共用题干Eat to LiveA meager diet may give you health and long life,but it's not much fun-and it might not even be necessary.We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.The genetic rejuvenation won't reverse other damage caused by time for the mouse,but could help its liver metabolize drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that-46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production-probably bad news for mouse health .In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly,"says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,says Spindler,could be enough to make sure a drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:‘I can only eat half of that.’"Spindler hopes we soon won't need to diet at all.His company,Lifespan Genetics in California,is looking for drugs that have the effects of calorie restriction. According to the last two paragraphs,Spindler believes that______.A: drugs do not have the effects of calorie restrictionB: dieting is not a good method to give us health and long lifeC: seeing the effect of a diet,people will like to eat less than normalD: calorie restriction is very important to young people
共用题干
Eat to Live
A meager diet may give you health and long life,but it's not much fun-and it might not even be necessary.We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.
Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.The genetic rejuvenation won't reverse other damage caused by time for the mouse,but could help its liver metabolize drugs or get rid of toxins.
Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years.
The researchers checked the activity of 11,000 genes from the mouse livers,and found that-46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production-probably bad news for mouse health .In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes.
"This is the first indication that these effects kick in pretty quickly,"says Huber Warner from the National Institute on Aging near Washington D.C.
No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.
If it does work in people,there might be good reasons for rejuvenating the liver. As we get ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,says Spindler,could be enough to make sure a drug is effective.
But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:‘I can only eat half of that.’"
Spindler hopes we soon won't need to diet at all.His company,Lifespan Genetics in California,is looking for drugs that have the effects of calorie restriction.
Eat to Live
A meager diet may give you health and long life,but it's not much fun-and it might not even be necessary.We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.
Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.The genetic rejuvenation won't reverse other damage caused by time for the mouse,but could help its liver metabolize drugs or get rid of toxins.
Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years.
The researchers checked the activity of 11,000 genes from the mouse livers,and found that-46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production-probably bad news for mouse health .In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes.
"This is the first indication that these effects kick in pretty quickly,"says Huber Warner from the National Institute on Aging near Washington D.C.
No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.
If it does work in people,there might be good reasons for rejuvenating the liver. As we get ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,says Spindler,could be enough to make sure a drug is effective.
But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:‘I can only eat half of that.’"
Spindler hopes we soon won't need to diet at all.His company,Lifespan Genetics in California,is looking for drugs that have the effects of calorie restriction.
According to the last two paragraphs,Spindler believes that______.
A: drugs do not have the effects of calorie restriction
B: dieting is not a good method to give us health and long life
C: seeing the effect of a diet,people will like to eat less than normal
D: calorie restriction is very important to young people
A: drugs do not have the effects of calorie restriction
B: dieting is not a good method to give us health and long life
C: seeing the effect of a diet,people will like to eat less than normal
D: calorie restriction is very important to young people
参考解析
解析：第一段第一句讲“节食可能不是非做不可的事”，第二句讲“即使上了年纪再节食，我们仍然有可能在很大程度上保持青春活力”，因此，“我们必须从小就开始节食”是错误的，D是正确答案。
第二段提及“一只高龄老鼠”的时候，作者谈到，“只要连续四周限制它进食，它的肝脏基因就会变得和衰老前一样充满活力”。据此，“为了描述节食对老鼠所产生的影响”最好地回答了题干中的问题。
第四段提到，“正常饲养的老鼠随着年龄的增长有46条肝脏基因会发生变化，这种变化与炎症和有机体组织无限激增有关”，因此D正确。
第四段最后一个句子讲“但最惊人的发现是那些上了年纪才开始节食的老鼠也能从70%的基因变化中受益”。“最惊人的”自然是“最令研究人员感兴趣的”。
文章的最后两段谈及Spindler时节食的看法。首先，他不能肯定节食是否值得。其次，他希望在不久的将来，我们不必节食。所以我们可以推知，他认为节食不是得以健康长寿的好办法。
第二段提及“一只高龄老鼠”的时候，作者谈到，“只要连续四周限制它进食，它的肝脏基因就会变得和衰老前一样充满活力”。据此，“为了描述节食对老鼠所产生的影响”最好地回答了题干中的问题。
第四段提到，“正常饲养的老鼠随着年龄的增长有46条肝脏基因会发生变化，这种变化与炎症和有机体组织无限激增有关”，因此D正确。
第四段最后一个句子讲“但最惊人的发现是那些上了年纪才开始节食的老鼠也能从70%的基因变化中受益”。“最惊人的”自然是“最令研究人员感兴趣的”。
文章的最后两段谈及Spindler时节食的看法。首先，他不能肯定节食是否值得。其次，他希望在不久的将来，我们不必节食。所以我们可以推知，他认为节食不是得以健康长寿的好办法。
相关考题：
—What should a healthy diet contain? —() A.We shouldn’t eat too much fast food because it’s rich in fat.B.A healthy diet should contain all the essential nutrients.C.A lot of food safety issues have been exposed in the food industry.
CIs there someone you hate? Well, maybe you don’t really hate them. But you get really angry every time you think of them. If you don’t let this anger go, it can turn into bitterness (痛苦).Bitterness appears when we can’t forgive (原谅) someone who has hurt us or made us angry. Someone might say or do something that hurts us. But instead of controlling the anger, we keep it deep inside. Before long, a bitter feeling begins to grow. We may think we’re hurting that person by criticizing (指责) him or her often, but we’re really only hurting ourselves.Bitterness can not only lead to serious health problems such as heart disease, but also hurt our relationships with friends and family members. No one enjoys being around an angry person for very long.If you see bitterness in your life, here are some ways to deal with it.l Accept itInstead of trying to deny your anger, make it clear to yourself and accept it. See your anger for what it is and quickly deal with it.l Stop making excuses for itYou may feel you have a right to be angry. You may think you’re right and the other person is wrong. You may even secretly enjoy making the other person look bad. But in the end, bitterness hurts you much more than the other person. The bitterness will hold you back, and the other person will go on with his or her life.l Forgive and forget itYou probably can’t completely put the anger out of your mind. But you can decide to forgive the other person. Forget it and move on. You’ll enjoy better health and peace of mind.66. According to the passage, we might get angry when someone __________.A. holds us back B. forgets us C. doesn’t like us D. does hurt us
Jack ___ you more help, even though he was busy. A.might have givenB.might giveC.may have givenD.may give
BBreakfast is very important． It- s one of the most important meals of the day． To build strong bodies and keep healthy, everyone should always eat a good breakfast． Eating the right food is needed for good health． We may have eggs, bread, milk, etc．for our breakfast．Many fathers and mothers don-t get their children to eat breakfast because they don't have breakfast themselves． It-s bad for their health．Without breakfast children may not grow as fast as they should and may not study and play as well in school in the morning as they could． They can be often ill, and when they're ill, it may take them longer to be in good health again than it takes children with good health habits．Without food the body will stop working． Nobody will live without food．( )26．If we eat a good breakfast,________A． we’ll be happy in the morningB． we’ll make our bodies strong and keep healthyC． we’ll eat less for lunchD． we’ll pass the exam
Passage 2The Ancient Greek philosopher Pythagoras is best known today for his mathematical theorem,which haunts the dreams of many geometry students, but for centuries he was also celebrated as thefather of vegetarianism. A meatless diet was referred to as a "Pythagorean diet" for years, up untilthe modem vegetarian movement began in the mid-1800s.While Pythagoras was an early proponent of a meatless diet, humans have been vegetarianssince well before recorded history．Most anthropologists agree that early humans would have eaten apredominantly plant-based diet；after all，plants can ’t run away．Additionally，our digestive systemsresemble those of herbivores closer than camivorous animals．Prehistoric man ate meat，of course，but plants formed the basis of his diet．Pythagoras and his many followers practiced vegetarianism for several reasons，mainly due toreligious and ethical objections．Pythagoras believed all living beings had souls．Animals were noexception，SO meat and fish were banished from his table．Strangely enough，he also banished avegetable that has a place of honor on most vegetarian menus today，the humble bean．His followerswere forbidden to eat or even touch beans，because he thought beans and humans were created fromthe same material．Fava beans were especially bad，as they have hollow steams that could allow thesouls of the dead to travel up from the soil into the growing beans．While the edict against beans was lifted not long after Pythagoras’death，his followerscontinued to eat a meatless diet．His principles influenced generations of academics and religiousthinkers，and it was a group of these like-minded individuals who founded the Vegetarian Society inEnglish in the mid-1800s．The virtues of temperance，abstinence and self．control were all tied tovegetarian Ideals，while lust，drunkenness and general hooliganism all resulted from a diet too rich inmeat products．Notable early vegetarians included Leo Tolstoy，George Bernard Shaw，MahatmaGandhi and American Bronson Alcott，a Transcendentalist teacher，reformer and the father of“LialeWomen”author Louisa May Alcott．It wasn’t until the 1960s that vegetarianism moved into mainstream American life and themovement’sgrowth picked up speed in the l 970s when a young graduate student named FrancisMoore Lappe wrote a book called Diet for a Small Planet．In it，she advocated a meatless diet not forethical or moral reasons，but because plant-based foods have much less impact on the environmentthan meat does．Today，many vegetarians refuse meat because of animal rights issues，or concernsover animal treatment，a principle first espoused in Peter Singer’s 1975 work A nimal Liberation．Which of the following is true according to the passageA.Pythagoras made a great contributing to biology.B.Pythagoras thought beans, like humans, had souls.C.Francis Moore Lappe is a contemporary vegetarian.D.Both Bronson Alcott and his daughter were vegetarians.
Passage 2The Ancient Greek philosopher Pythagoras is best known today for his mathematical theorem,which haunts the dreams of many geometry students, but for centuries he was also celebrated as thefather of vegetarianism. A meatless diet was referred to as a "Pythagorean diet" for years, up untilthe modem vegetarian movement began in the mid-1800s.While Pythagoras was an early proponent of a meatless diet, humans have been vegetarianssince well before recorded history．Most anthropologists agree that early humans would have eaten apredominantly plant-based diet；after all，plants can ’t run away．Additionally，our digestive systemsresemble those of herbivores closer than camivorous animals．Prehistoric man ate meat，of course，but plants formed the basis of his diet．Pythagoras and his many followers practiced vegetarianism for several reasons，mainly due toreligious and ethical objections．Pythagoras believed all living beings had souls．Animals were noexception，SO meat and fish were banished from his table．Strangely enough，he also banished avegetable that has a place of honor on most vegetarian menus today，the humble bean．His followerswere forbidden to eat or even touch beans，because he thought beans and humans were created fromthe same material．Fava beans were especially bad，as they have hollow steams that could allow thesouls of the dead to travel up from the soil into the growing beans．While the edict against beans was lifted not long after Pythagoras’death，his followerscontinued to eat a meatless diet．His principles influenced generations of academics and religiousthinkers，and it was a group of these like-minded individuals who founded the Vegetarian Society inEnglish in the mid-1800s．The virtues of temperance，abstinence and self．control were all tied tovegetarian Ideals，while lust，drunkenness and general hooliganism all resulted from a diet too rich inmeat products．Notable early vegetarians included Leo Tolstoy，George Bernard Shaw，MahatmaGandhi and American Bronson Alcott，a Transcendentalist teacher，reformer and the father of“LialeWomen”author Louisa May Alcott．It wasn’t until the 1960s that vegetarianism moved into mainstream American life and themovement’sgrowth picked up speed in the l 970s when a young graduate student named FrancisMoore Lappe wrote a book called Diet for a Small Planet．In it，she advocated a meatless diet not forethical or moral reasons，but because plant-based foods have much less impact on the environmentthan meat does．Today，many vegetarians refuse meat because of animal rights issues，or concernsover animal treatment，a principle first espoused in Peter Singer’s 1975 work A nimal Liberation．What issue were vegetarians in the mid-1800s in England primary reason with whenrefusing to eat meatA.Environmental protection.B.Animal rights.C.Religious belief.D.Moral purity.
Passage 2The Ancient Greek philosopher Pythagoras is best known today for his mathematical theorem,which haunts the dreams of many geometry students, but for centuries he was also celebrated as thefather of vegetarianism. A meatless diet was referred to as a "Pythagorean diet" for years, up untilthe modem vegetarian movement began in the mid-1800s.While Pythagoras was an early proponent of a meatless diet, humans have been vegetarianssince well before recorded history．Most anthropologists agree that early humans would have eaten apredominantly plant-based diet；after all，plants can ’t run away．Additionally，our digestive systemsresemble those of herbivores closer than camivorous animals．Prehistoric man ate meat，of course，but plants formed the basis of his diet．Pythagoras and his many followers practiced vegetarianism for several reasons，mainly due toreligious and ethical objections．Pythagoras believed all living beings had souls．Animals were noexception，SO meat and fish were banished from his table．Strangely enough，he also banished avegetable that has a place of honor on most vegetarian menus today，the humble bean．His followerswere forbidden to eat or even touch beans，because he thought beans and humans were created fromthe same material．Fava beans were especially bad，as they have hollow steams that could allow thesouls of the dead to travel up from the soil into the growing beans．While the edict against beans was lifted not long after Pythagoras’death，his followerscontinued to eat a meatless diet．His principles influenced generations of academics and religiousthinkers，and it was a group of these like-minded individuals who founded the Vegetarian Society inEnglish in the mid-1800s．The virtues of temperance，abstinence and self．control were all tied tovegetarian Ideals，while lust，drunkenness and general hooliganism all resulted from a diet too rich inmeat products．Notable early vegetarians included Leo Tolstoy，George Bernard Shaw，MahatmaGandhi and American Bronson Alcott，a Transcendentalist teacher，reformer and the father of“LialeWomen”author Louisa May Alcott．It wasn’t until the 1960s that vegetarianism moved into mainstream American life and themovement’sgrowth picked up speed in the l 970s when a young graduate student named FrancisMoore Lappe wrote a book called Diet for a Small Planet．In it，she advocated a meatless diet not forethical or moral reasons，but because plant-based foods have much less impact on the environmentthan meat does．Today，many vegetarians refuse meat because of animal rights issues，or concernsover animal treatment，a principle first espoused in Peter Singer’s 1975 work A nimal Liberation．Which of the following might be the best title for the passageA.The History of VegetarianismB.The Father of VegetarianismC.The Advocates of VegetarianismD.The Benefits of Vegetarianism
Passage 2The Ancient Greek philosopher Pythagoras is best known today for his mathematical theorem,which haunts the dreams of many geometry students, but for centuries he was also celebrated as thefather of vegetarianism. A meatless diet was referred to as a "Pythagorean diet" for years, up untilthe modem vegetarian movement began in the mid-1800s.While Pythagoras was an early proponent of a meatless diet, humans have been vegetarianssince well before recorded history．Most anthropologists agree that early humans would have eaten apredominantly plant-based diet；after all，plants can ’t run away．Additionally，our digestive systemsresemble those of herbivores closer than camivorous animals．Prehistoric man ate meat，of course，but plants formed the basis of his diet．Pythagoras and his many followers practiced vegetarianism for several reasons，mainly due toreligious and ethical objections．Pythagoras believed all living beings had souls．Animals were noexception，SO meat and fish were banished from his table．Strangely enough，he also banished avegetable that has a place of honor on most vegetarian menus today，the humble bean．His followerswere forbidden to eat or even touch beans，because he thought beans and humans were created fromthe same material．Fava beans were especially bad，as they have hollow steams that could allow thesouls of the dead to travel up from the soil into the growing beans．While the edict against beans was lifted not long after Pythagoras’death，his followerscontinued to eat a meatless diet．His principles influenced generations of academics and religiousthinkers，and it was a group of these like-minded individuals who founded the Vegetarian Society inEnglish in the mid-1800s．The virtues of temperance，abstinence and self．control were all tied tovegetarian Ideals，while lust，drunkenness and general hooliganism all resulted from a diet too rich inmeat products．Notable early vegetarians included Leo Tolstoy，George Bernard Shaw，MahatmaGandhi and American Bronson Alcott，a Transcendentalist teacher，reformer and the father of“LialeWomen”author Louisa May Alcott．It wasn’t until the 1960s that vegetarianism moved into mainstream American life and themovement’sgrowth picked up speed in the l 970s when a young graduate student named FrancisMoore Lappe wrote a book called Diet for a Small Planet．In it，she advocated a meatless diet not forethical or moral reasons，but because plant-based foods have much less impact on the environmentthan meat does．Today，many vegetarians refuse meat because of animal rights issues，or concernsover animal treatment，a principle first espoused in Peter Singer’s 1975 work A nimal Liberation．Which of the following statements fails to be inferred from the passageA.A meatless diet was supported and practiced by Pythagoras.B.After his death, Pythagoras' followers continued to eat beans.C.Pythagoras influenced a lot of people who chose not to eat meat.D.Pythagoras refused to eat any meat for religious and ethical reasons.
Passage 2The Ancient Greek philosopher Pythagoras is best known today for his mathematical theorem,which haunts the dreams of many geometry students, but for centuries he was also celebrated as thefather of vegetarianism. A meatless diet was referred to as a "Pythagorean diet" for years, up untilthe modem vegetarian movement began in the mid-1800s.While Pythagoras was an early proponent of a meatless diet, humans have been vegetarianssince well before recorded history．Most anthropologists agree that early humans would have eaten apredominantly plant-based diet；after all，plants can ’t run away．Additionally，our digestive systemsresemble those of herbivores closer than camivorous animals．Prehistoric man ate meat，of course，but plants formed the basis of his diet．Pythagoras and his many followers practiced vegetarianism for several reasons，mainly due toreligious and ethical objections．Pythagoras believed all living beings had souls．Animals were noexception，SO meat and fish were banished from his table．Strangely enough，he also banished avegetable that has a place of honor on most vegetarian menus today，the humble bean．His followerswere forbidden to eat or even touch beans，because he thought beans and humans were created fromthe same material．Fava beans were especially bad，as they have hollow steams that could allow thesouls of the dead to travel up from the soil into the growing beans．While the edict against beans was lifted not long after Pythagoras’death，his followerscontinued to eat a meatless diet．His principles influenced generations of academics and religiousthinkers，and it was a group of these like-minded individuals who founded the Vegetarian Society inEnglish in the mid-1800s．The virtues of temperance，abstinence and self．control were all tied tovegetarian Ideals，while lust，drunkenness and general hooliganism all resulted from a diet too rich inmeat products．Notable early vegetarians included Leo Tolstoy，George Bernard Shaw，MahatmaGandhi and American Bronson Alcott，a Transcendentalist teacher，reformer and the father of“LialeWomen”author Louisa May Alcott．It wasn’t until the 1960s that vegetarianism moved into mainstream American life and themovement’sgrowth picked up speed in the l 970s when a young graduate student named FrancisMoore Lappe wrote a book called Diet for a Small Planet．In it，she advocated a meatless diet not forethical or moral reasons，but because plant-based foods have much less impact on the environmentthan meat does．Today，many vegetarians refuse meat because of animal rights issues，or concernsover animal treatment，a principle first espoused in Peter Singer’s 1975 work A nimal Liberation．Which of the following is closest in meaning to the underlined word in PARAGRAPHTHREEA.Evil.B.Palatable.C.Plain.D.Notorious
共用题干Eat for a Good and Healthful LifeFood is essential to us as it_________(1)us alive.But recently,research has shown that the eating habits of the average Americans may be dangerous to future ________(2).The foods Americans now choose are often too________(3) in calories（卡路里） and fats. So this article reports a new study: Diet and Health, Implications（含意）for Reducing Chronic Disease Risk.The study,conducted_________(4)the National Research Council's Committee on Diet and Health,__________(5)that balancing nutrition（营养）,calories and activity is the_____(6)to enjoying a long and healthful life.The report recommends that most Americans increase_____(7)activity to a moderate level and make changes in food__________(8)and the amount of calories taken to maintain ideal weight.Most of us-even_________(9)of us at ideal weight-need to eat less fat so _________(10)no more than 30%of our daily calories will come from fat.That means cutting _______ ( 1 1 ) on red meat and whole milk dairy（乳制品） products.Indeed,eat fish,chicken without skin,meats containing little or no fat,and low-fat or no-fat dairy__________(12).The report of the Committee on Diet and Health recommends we eat five or more 1/2- cup servings（一份）of vegetables and fruits___________(13）一especially green and yellow vegetables and such fruits as oranges and lemons.Eating more fruits_________(14)vegetables doesn't have to mean taking increased amounts of calories.Many plant foods are rich in nutritional substances:they provide many vitamins and minerals for very few__________(15)._________(10) A:long B: much C: that D: as
共用题干A Health ProfileA health profile is a portrait of all of the factors that influence your health.To draw your health profile, you will______(51)what diseases run in your family,what health hazards you may be exposed to ______(52)work,how your daily______(53)compares to the recommended standards,how much time per week you______(54)exercising and what type of exercise you engage______(55),how stressful your work and family environments are,what kinds of illnesses you get regularly,and______(56) or not you have any one of a number of addictions.______(57)this portrait,you should have a checkup to determine how your blood,heart,and lungs are functioning.This checkup will serve______(58)a baseline,to which you can then compare later tests.______(59)this profile is thoroughly drawn,you can begin to think about setting health priorities based______(60)your particular portrait.For example,if you drink two martinis every evening,have a high-stress______(61),are overweight,smoke a pack of cigarettes a day,and use marijuana occasional-ly on weekends,you should quit smoking first,followed______(62)losing the excess weight,reducing the stress of your job,giving up your marijuana habit,and then finally giving some______(63)to those martinis if you want to prevent first cancer,and then heart disease.Even for the youthful working person who has never been sick a day in his life,who is______(64)excellent health,agood look at allhealth habits and at work and home environments may suggest.changes that will______(65)him in the future.53._________A:diet B:meals C:food D:dinner
共用题干第一篇A meager（不足的）diet may give you health and long life, but it's not much fun一and it might not even be necessary. We may be able to hang on to most of that youthful（有青春活力的）vigor （精力）even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation（恢复活力，返老还童） won't reverse other damage caused by time for the mouse,but could help its liver metabolize（使进入新陈代谢过程）drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old一equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that 46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production一probably bad news for mouse health.In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes.But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly",says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get older,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of dieting,says Spindler,could be enough to make sure a. drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:I can only eat half of that."Spindler hopes we soon won't need to diet at all. His company,Lifespan Genetics in California, is looking for drugs that have the effects of calorie restriction.Why does the author mention an elderly mouse in paragraph 2?A:To describe the influence of old age on mice.B:To illustrate the effect of meager food on mice.C:To tell us how mice's liver genes behave.D:To inform us of the process of metabolizing drugs.
共用题干第一篇A meager（不足的）diet may give you health and long life, but it's not much fun一and it might not even be necessary. We may be able to hang on to most of that youthful（有青春活力的）vigor （精力）even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation（恢复活力，返老还童） won't reverse other damage caused by time for the mouse,but could help its liver metabolize（使进入新陈代谢过程）drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old一equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that 46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production一probably bad news for mouse health.In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes.But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly",says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get older,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of dieting,says Spindler,could be enough to make sure a. drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:I can only eat half of that."Spindler hopes we soon won't need to diet at all. His company,Lifespan Genetics in California, is looking for drugs that have the effects of calorie restriction.What can be inferred about completely normally fed mice mentioned in the passage?A:They will not experience free radical production.B:They will experience more genetic rejuvenation in their lifetime.C:They have more old liver genes to behave like young genes.D:They are more likely to suffer from inflammation.
共用题干第一篇A meager（不足的）diet may give you health and long life, but it's not much fun一and it might not even be necessary. We may be able to hang on to most of that youthful（有青春活力的）vigor （精力）even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation（恢复活力，返老还童） won't reverse other damage caused by time for the mouse,but could help its liver metabolize（使进入新陈代谢过程）drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old一equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that 46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production一probably bad news for mouse health.In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes.But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly",says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get older,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of dieting,says Spindler,could be enough to make sure a. drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:I can only eat half of that."Spindler hopes we soon won't need to diet at all. His company,Lifespan Genetics in California, is looking for drugs that have the effects of calorie restriction.According to the author,which of the following most interested the researchers? A:The mice that started dieting in old ageB:27 of those 46 old genes that continued to behave like young genesC:Calorie restriction that works in peopleD:Dieting that makes sure a drug is effective
共用题干第一篇A meager（不足的）diet may give you health and long life, but it's not much fun一and it might not even be necessary. We may be able to hang on to most of that youthful（有青春活力的）vigor （精力）even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation（恢复活力，返老还童） won't reverse other damage caused by time for the mouse,but could help its liver metabolize（使进入新陈代谢过程）drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old一equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that 46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production一probably bad news for mouse health.In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes.But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly",says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get older,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of dieting,says Spindler,could be enough to make sure a. drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:I can only eat half of that."Spindler hopes we soon won't need to diet at all. His company,Lifespan Genetics in California, is looking for drugs that have the effects of calorie restriction.According to the last two paragraphs,Spindler believes that__________.A:calorie restriction is very important to young people.B:seeing the effect of a diet,people will like to eat less than normal.C:dieting is not a good method to give us health and long life.D:drugs do not have the effects of calorie restriction.
共用题干第一篇A meager（不足的）diet may give you health and long life, but it's not much fun一and it might not even be necessary. We may be able to hang on to most of that youthful（有青春活力的）vigor （精力）even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation（恢复活力，返老还童） won't reverse other damage caused by time for the mouse,but could help its liver metabolize（使进入新陈代谢过程）drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old一equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that 46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production一probably bad news for mouse health.In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes.But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly",says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get older,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of dieting,says Spindler,could be enough to make sure a. drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:I can only eat half of that."Spindler hopes we soon won't need to diet at all. His company,Lifespan Genetics in California, is looking for drugs that have the effects of calorie restriction.According to the passage,which of the following is NOT true?A:Eating less than usual might make us live longer.B:If we go on a diet when old,we may keep healthy.C:Dieting might not be needed.D:We have to begin dieting since childhood.
共用题干Old Man Myths and Realities1 When does a middle-aged man become an old man?Officially,of course,it's when we reach retirement age. But, as we all know, this is a fairly blunt（生硬的）method of decision making. As life expectancy（预期寿命）increases, retirement planning needs to be changed .This is because being an old man today is very different from what it was a generation or so ago.2 Sixty-five is the new middle-aged man. These days people are talking about the young-old,that is ages 70-75,and those over 75 as the old-old. The young-old frequently continue in good health and maintain strong links with friends and family.The old-old have a much higher chance of poor health and social isolation.3 Although men are living longer,there are still more old women than old men.This fact alone should arouse interest as to why.Relatively little is actually known about why this is the case or about the experiences of the old man .Sure,we are aware that the old man experiences anxiety,financial problems,loneliness,etc.,but that's really about all we know.4 It is usually believed that the old man often complains about their health.In fact,most rate their health as good even though most are diagnosed with at least one chronic illness. The physical health of the old man is strongly affected by their health behavior when they were younger.A man in his mid-60s is now regarded as________.A: in good healthB: in the pastC: in the wrongD: the old manE: a middle-aged manF: a young man
共用题干Many Women Who Beat Cancer Don't Change HabitsMany women who battle breast cancer will tell you it's a life-changing experience. However,a new study shows that for many___1___ ,the changes aren't always positive or permanent.Beth Snoke has watched her mother and both grandmothers battle and survive breast ___2___.So when she was diagnosed,there was no doubt in her mind ___3___ she had to do.“I do exactly what the doctors say as far as the medicine that I'm on,as ___4___ as the vitamins,the diet,and the fitness. And I can't stress enough___5___ important that is,”saysBeth Snoke. But a surprising new study shows that___ 6___ every woman who beats breast cancer is getting that message. In fact,nearly 40% of them say even___7___ surviving breast cancer,they haven't made significant changes in the 8 they eat or how much they exer- cise.“Not all survivors are taking advantage of this teachable moment and making positive health changes in___9___life,”says Electra Paskett,PhD,at Ohio State University's Cornprehensive Cancer Center. Paskett says diet and exercise have been proven to not only help women feel better during and after treatment,they may___10___play a role in preventing some cancers from coming back.___ 11___ growing evidence,some women just aren't listening.“Colon cancer survivors ___12___ exercise have actually been shown to have improved survival rates.So,yes,it is true that perhaps by making some of these healthy choices we can actually increase their health,”says Paskett.As a breast cancer survivor ___13___ ,Paskett knows first hand how much difference diet and exercise can___14___.The challenge,she says,is to get more survivors to be more like Beth,during and after treatment.Experts-say exercising more and eating a healthier diet can also cut___15___on stress and help women overcome depression. There are more than 2 million breast cancer survivors liv-ing in the U. S. of those,nearly a million have yet to change their diet or exercise routines.9._________A: theirB: hisC: her D: our
共用题干Many Women Who Beat Cancer Don't Change HabitsMany women who battle breast cancer will tell you it's a life-changing experience. However,a new study shows that for many___1___ ,the changes aren't always positive or permanent.Beth Snoke has watched her mother and both grandmothers battle and survive breast ___2___.So when she was diagnosed,there was no doubt in her mind ___3___ she had to do.“I do exactly what the doctors say as far as the medicine that I'm on,as ___4___ as the vitamins,the diet,and the fitness. And I can't stress enough___5___ important that is,”saysBeth Snoke. But a surprising new study shows that___ 6___ every woman who beats breast cancer is getting that message. In fact,nearly 40% of them say even___7___ surviving breast cancer,they haven't made significant changes in the 8 they eat or how much they exer- cise.“Not all survivors are taking advantage of this teachable moment and making positive health changes in___9___life,”says Electra Paskett,PhD,at Ohio State University's Cornprehensive Cancer Center. Paskett says diet and exercise have been proven to not only help women feel better during and after treatment,they may___10___play a role in preventing some cancers from coming back.___ 11___ growing evidence,some women just aren't listening.“Colon cancer survivors ___12___ exercise have actually been shown to have improved survival rates.So,yes,it is true that perhaps by making some of these healthy choices we can actually increase their health,”says Paskett.As a breast cancer survivor ___13___ ,Paskett knows first hand how much difference diet and exercise can___14___.The challenge,she says,is to get more survivors to be more like Beth,during and after treatment.Experts-say exercising more and eating a healthier diet can also cut___15___on stress and help women overcome depression. There are more than 2 million breast cancer survivors liv-ing in the U. S. of those,nearly a million have yet to change their diet or exercise routines.8._________A: placeB: kindC: wayD: much
共用题干第二篇People who forgive show less depression,anger and stress and more hopefulness.To forgive may be divine,but no one ever said it was easy.When someone has deeply hurt you,it can be extremely difficult to let go of your grudge.But forgiveness is possible,and it can be surprisingly beneficial to your physical and mental health."People who forgive show less depression,anger and stress and more hopefulness,"says Fredric,Ph.D,author of Forgive for Good."So it can help save on the wear and tear on our organs, reduce the wearing out of the immune system and allow people to feel more vital."So how do you start the healing?Try the following steps:Calm yourself. To defuse your anger,try a simple stress management technique."Take a couple of breaths and think of something that gives you pleasure:a beautiful scene in nature,or someone you love."Frederic says.Don't wait for an apology. "Many times the person who hurt you has no intention of apologizing,"Frederic says."They may have wanted to hurt you or they just don't see things the same way.So if you wait for people to apologize,you could be waiting an awfully long time."Keep in mind that forgiveness does not necessarily mean reconciliation with the person who upset you or condoning of his or her action.Take the control away from your offender. Mentally replaying your hurt gives power to the person who caused you pain."Instead of focusing on your wounded feeling,learn to look for the love, beauty and kindness around you,"Frederic says.Try to see things from the other person's perspective.If you empathize with that person,you may realize that he or she was acting out of ignorance,fear,even love.To gain perspective,you may want to write a letter to yourself from your offender's point of view.Recognize the benefits of forgiveness.Research has shown that people who forgive report more energy,better appetite and better sleep patterns.Don't forget to forgive yourself."For some people,forgiving themselves is the biggest challenge,"Frederic says."But it can rob you self-confidence if you don't do it."Your offender may not want to apologize because_________.A:they are afraid that they won't be forgivenB:they don't even realize they had hurt youC:they don't share the same feeling with youD:they think that time can heal any wound
共用题干Eat to LiveA meager diet may give you health and long life,but it's not much fun-and it might not even be necessary.We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.The genetic rejuvenation won't reverse other damage caused by time for the mouse,but could help its liver metabolize drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that-46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production-probably bad news for mouse health .In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly,"says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,says Spindler,could be enough to make sure a drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:‘I can only eat half of that.’"Spindler hopes we soon won't need to diet at all.His company,Lifespan Genetics in California,is looking for drugs that have the effects of calorie restriction. What can be inferred about completely normally fed mice mentioned in the passage?A: They will not experience free radical production.B: They will experience more genetic rejuvenation in their lifetime.C: They have more old liver genes to behave like young genes.D: They are more likely to suffer from inflammation.
共用题干Houses of the FutureWhat will houses be like in thirty years'time?Nol one really knQws,but architects are trying to pre-diet. ____________(46)Future houses will have to be flexible.In thirty years'time even more of us will be working from home. So we will have to be able to use areas of the house for work for part of the day and for living for the rest.Families grow and change with children arriving,growing up and leaving home._________(47)Nothing will be as fixed as it is now. The house wi ll always be changing to meet changing needs.Everyone agrees that in thirty years'time we wiii be living in "intelligent" houses.We will be able to talk to our kitchen machines and discuss w lth them what to do.Like this:"we'11 be having a party this weekend.What food shall we cook?"__________ (48)We will be able to leave most of the cooking to the machines,just tasting things from time to time to check.The house of the future will be personal一each house will be different.________(49)You won't have to paint them一you'11 be able to tell the wall to change the color!And if you don't like the color the next day,you will be able to have a new one.__________(50)____________(46)A:You will be able to change the color of the wall easily.B:The only thing you won't be able to do is moving the house somewhere else!C:And the machine will tell us what food we will have to buy and how to cook it.D:What will our home be like then?F:The house of the future will have to grow and change with the family.F:The kids might take their bedrooms with them as they leave.
共用题干Eat to LiveA meager diet may give you health and long life,but it's not much fun-and it might not even be necessary.We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.The genetic rejuvenation won't reverse other damage caused by time for the mouse,but could help its liver metabolize drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that-46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production-probably bad news for mouse health .In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly,"says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,says Spindler,could be enough to make sure a drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:‘I can only eat half of that.’"Spindler hopes we soon won't need to diet at all.His company,Lifespan Genetics in California,is looking for drugs that have the effects of calorie restriction. According to the passage,which of the following is NOT true?A: Eating less than usual might make us live longer.B:If we go on a diet when old,we may keep healthy.C: Dieting might not be needed.D: We have to begin dieting since childhood.
共用题干Eat to LiveA meager diet may give you health and long life,but it's not much fun-and it might not even be necessary.We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.The genetic rejuvenation won't reverse other damage caused by time for the mouse,but could help its liver metabolize drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that-46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production-probably bad news for mouse health .In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly,"says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,says Spindler,could be enough to make sure a drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:‘I can only eat half of that.’"Spindler hopes we soon won't need to diet at all.His company,Lifespan Genetics in California,is looking for drugs that have the effects of calorie restriction. Why does the author mention an elderly mouse in paragraph 2?A: To describe the influence of old age on mice.B: To illustrate the effect of meager food on mice.C: To tell us how mice's liver genes behave.D: To inform us of the process of metabolizing drugs.
共用题干Eat to LiveA meager diet may give you health and long life,but it's not much fun-and it might not even be necessary.We may be able to hang on to most of that youthful vigor even if we don't start to diet until old age.Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks.The genetic rejuvenation won't reverse other damage caused by time for the mouse,but could help its liver metabolize drugs or get rid of toxins.Spindler's team fed three mice a normal diet for their whole lives,and fed another three on half-rations.Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years.The researchers checked the activity of 11,000 genes from the mouse livers,and found that-46 changed with age in the normally fed mice.The changes were associated with things like inflammation and free radical production-probably bad news for mouse health .In the mice that had dieted all their lives,27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes."This is the first indication that these effects kick in pretty quickly,"says Huber Warner from the National Institute on Aging near Washington D.C.No one yet knows if calorie restriction works in people as it does in mice,but Spindler is hopeful."There's attracting and tempting evidence out there that it will work,"he says.If it does work in people,there might be good reasons for rejuvenating the liver. As we get ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,says Spindler,could be enough to make sure a drug is effective.But Spindler isn't sure the trade-off is worth it."The mice get less disease,they live longer,but they're hungry,"he says."Even seeing what a diet does,it's still hard to go to a restaurant and say:‘I can only eat half of that.’"Spindler hopes we soon won't need to diet at all.His company,Lifespan Genetics in California,is looking for drugs that have the effects of calorie restriction. According to the author,which of the following most interested the researchers?A: The mice that started dieting in old age.B: 27 of those 46 old genes that continued to behave like young genes.C: Calorie restriction that works in people.D: Dieting that makes sure a drug is effective.
单选题What’s the _____ of having a public open space where you can’t eat, drink or even simply hang out for a while?AsenseBmatterCcaseDopinion
单选题But even if you never give another speech in your life, you still have much to（）from studying public speaking.AgainBgrainCtrainDrain