Individuals who have consumed alcohol within 24 hours of exposure to H2S can tolerate ______.A.unusually large concentrations of H2SB.smaller than normal concentrations of H2SC.moderate concentrations of H2S without the usual reactionsD.longer exposure to H2S concentrations
Individuals who have consumed alcohol within 24 hours of exposure to H2S can tolerate ______.
A.unusually large concentrations of H2S
B.smaller than normal concentrations of H2S
C.moderate concentrations of H2S without the usual reactions
D.longer exposure to H2S concentrations
相关考题：
The college will provide ________ for students who have problems with alcohol or drugs.A contradictionB counselingC contactD conception
After abandoning a vessel，water that is consumed within the first 24 hours will ______.A.pass through the body with little absorbed by the systemB.help to prevent fatigueC.quench thirst for only 2 hoursD.help to prevent seasickness
Drunken driving, sometimes called America's socially accepted form of murder, has become a national epidemic. Every hour of every day about three Americans on average are killed hydrunken drivers, adding up an incredible 350,000 over the past decade.A drunken driver is usually defined as one with a 0.10 blood alcohol content or roughly three beers, glasses of wine or shots of whisky drunk within two hours. Heavy drinking used to be an acceptable part of the American alcohol image and judges were lenient in most courts, but the drunken slaughter has recently caused so many well-publicized tragedies, especially involving young children, that public opinion is no longer so tolerant.Twenty states have raised the legal drinking age to 21, reversing a trend in the 1960s to reduce it to 18. After New Jersey lowered it to 18, the number of people killed by 18 to 20-year-old drivers more than doubled, so the state recently upped it back to 21.Reformers, however, fear raising the drinking age will have little effect unless accompanied by educational programs to help young people to develop"responsible attitudes" about drinking and teach them to resist peer pressure to drink.Tough new laws have led to increased arrests and in many areas already, to a marked decline in fatalities. Some states are also penalizing bars for serving customers too many drinks.As the fatalities continue to occur daily in every state, some Americans are even beginning to speak well of the 13 years' national prohibition of alcohol that began in 1919, which President Hoover called the"noble experiment". They forget that legal prohibition didn't stop drinking, but encouraged political corruption and organized crime. As with the booming drug trade generally, there is no easy solution.Which of the following four drivers can be defined as an illegal driver?A.A sixteen-year-old boy who drank a glass of wine three hours ago.B.An old lady who took four shots of whisky in yesterday's party.C.A policeman who likes alcohol very much.D.A pregnant woman who drank a beer an hour ago.
共用题干第一篇In what may be bad news for bars and pubs,a European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those taking their libations with food.Luigino Dal Maso and his colleagues studied the drinking pattems of 1 ,500 patients from four cancer studies and another 3,500 adults who had never had cancer.After the researchers accounted for the amount of alcohol consumed,they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity（腔）,pharynx（咽）,and esophagus（食管）,when compared with people who drank only at meals.Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal（喉）cancer."Roughly 95 percent of cancers at these four sites traced to smoking or drinking by the study volunteers,"Dal Maso says.The discouraging news,his team reports, is that drinking with meals didn't eliminate cancer risk at any of the sites.For their new analysis,the European scientists divided people in the study into four groups, based on how many drinks they reported having in an average week.The lowest-intake group includ-ed people who averaged up to 20 drinks a week.The highest group reported downing at least 56 servings of alcohol weekly for an average of eight or more per day.Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals.For instance,compared with people in the lowest-consumption group,participants who drank 21 to 34 alcohol servings a week at least doubled their cancer risk for all sites other than the laryngeal cancer. If people in these consumption groups took some of those drinks outside meals,those in the higher consumption group at least quadrupled their risk for oral cavity and esophageal cancers.People in the highest-consumption group who drank only with meals had 10 times the risk of oral cancer,7 times the risk of pharyngeal cancer,and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals.In contrast,laryngeal cancer risk in the high-intake,with-meals-only group was only triple that in the low-intake consumers who drank with meals."Alcohol can inflame tissues.Over time,that inflammation can trigger cancer."Dal Maso says.He suspects that food reduced cancer risk either by partially coating digestive-tract tissues or by scrubbing alcohol off those tissues.He speculates that the reason laryngeal risks were dramatically lower for all study participants traces to the tissue's lower exposure to alcohol.Approximately how many drinks do the lowest-intake group average per day?A:3 drinks. B:8 drinks.C:20 drinks. D:56 drinks.
共用题干第一篇In what may be bad news for bars and pubs,a European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those taking their libations with food.Luigino Dal Maso and his colleagues studied the drinking pattems of 1 ,500 patients from four cancer studies and another 3,500 adults who had never had cancer.After the researchers accounted for the amount of alcohol consumed,they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity（腔）,pharynx（咽）,and esophagus（食管）,when compared with people who drank only at meals.Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal（喉）cancer."Roughly 95 percent of cancers at these four sites traced to smoking or drinking by the study volunteers,"Dal Maso says.The discouraging news,his team reports, is that drinking with meals didn't eliminate cancer risk at any of the sites.For their new analysis,the European scientists divided people in the study into four groups, based on how many drinks they reported having in an average week.The lowest-intake group includ-ed people who averaged up to 20 drinks a week.The highest group reported downing at least 56 servings of alcohol weekly for an average of eight or more per day.Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals.For instance,compared with people in the lowest-consumption group,participants who drank 21 to 34 alcohol servings a week at least doubled their cancer risk for all sites other than the laryngeal cancer. If people in these consumption groups took some of those drinks outside meals,those in the higher consumption group at least quadrupled their risk for oral cavity and esophageal cancers.People in the highest-consumption group who drank only with meals had 10 times the risk of oral cancer,7 times the risk of pharyngeal cancer,and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals.In contrast,laryngeal cancer risk in the high-intake,with-meals-only group was only triple that in the low-intake consumers who drank with meals."Alcohol can inflame tissues.Over time,that inflammation can trigger cancer."Dal Maso says.He suspects that food reduced cancer risk either by partially coating digestive-tract tissues or by scrubbing alcohol off those tissues.He speculates that the reason laryngeal risks were dramatically lower for all study participants traces to the tissue's lower exposure to alcohol.According to the last paragraph,tissue's lower exposure to alcohol__________.A:explains why inflammation triggers cancerB:accounts for why food can coat digestive-tract tissuesC:is the reason why food can scrub alcohol off tissuesD:reduces the risk of laryngeal cancer
共用题干第一篇In what may be bad news for bars and pubs,a European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those taking their libations with food.Luigino Dal Maso and his colleagues studied the drinking pattems of 1 ,500 patients from four cancer studies and another 3,500 adults who had never had cancer.After the researchers accounted for the amount of alcohol consumed,they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity（腔）,pharynx（咽）,and esophagus（食管）,when compared with people who drank only at meals.Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal（喉）cancer."Roughly 95 percent of cancers at these four sites traced to smoking or drinking by the study volunteers,"Dal Maso says.The discouraging news,his team reports, is that drinking with meals didn't eliminate cancer risk at any of the sites.For their new analysis,the European scientists divided people in the study into four groups, based on how many drinks they reported having in an average week.The lowest-intake group includ-ed people who averaged up to 20 drinks a week.The highest group reported downing at least 56 servings of alcohol weekly for an average of eight or more per day.Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals.For instance,compared with people in the lowest-consumption group,participants who drank 21 to 34 alcohol servings a week at least doubled their cancer risk for all sites other than the laryngeal cancer. If people in these consumption groups took some of those drinks outside meals,those in the higher consumption group at least quadrupled their risk for oral cavity and esophageal cancers.People in the highest-consumption group who drank only with meals had 10 times the risk of oral cancer,7 times the risk of pharyngeal cancer,and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals.In contrast,laryngeal cancer risk in the high-intake,with-meals-only group was only triple that in the low-intake consumers who drank with meals."Alcohol can inflame tissues.Over time,that inflammation can trigger cancer."Dal Maso says.He suspects that food reduced cancer risk either by partially coating digestive-tract tissues or by scrubbing alcohol off those tissues.He speculates that the reason laryngeal risks were dramatically lower for all study participants traces to the tissue's lower exposure to alcohol.Researchers have found that the risk of cancer in the mouth and neck is higher with people_________.A:who drink alcohol outside of mealsB:who drink alcohol at mealsC:who never drink alcoholD:who drink alcohol at bars and pubs
共用题干SleepingPeople who sleep for more than eight hours a night do not live as long as those who sleep for six hours,according to the biggest study yet into sleep patterns and mortality（死亡率）.Scientists have no explanation for the findings and do not know if they mean people who like a lie-in（睡懒觉）can extend their lives by sleeping less.Although it is a common belief that sleeping for at least eight hours a night is vital forhealth and well-being,the six-year study involving more than 1.1 million Americans older than 30 found that those who slept for less than eight hours were far from doing themselves any long-term harm."Individuals who now average 6.5 hours of sleep a night can be reassured that this is a safe amount of sleep.From a health standpoint,there is no reason to sleep longer,"said Daniel Kripke , a professor of psychiatry（精神病学）at the University of California, San Diego.Dr. Kripke said,"We don't know if long sleep periods lead to death.Additional studies are needed to determine if setting your alarm clock earlier will actually improve your health."The scientists,who were funded by the American Cancer Society,found that the best survival rates were among the men and women who slept for seven hours a night.Those who slept for eight hours were 12 per cent more likely to die during the six-year period of the study,when other factors such as diet and smoking were taken into account.Even those who spent a mere five hours a night in bed lived longer than those who slept eight or more hours.However,an increasing death rate was found among those who slept for less than five hours.Dr. Kripke said,"Previous sleep studies have indicated that both short-and long-duration （持续时间）sleep had higher mortality rates. However, none of those studies were large enough to distinguish the difference between seven and eight hours a night,until now." Most of the participants slept for 7 hours a night during the study.A:Right B:Wrong C:Not mentioned
共用题干第一篇“Don' t Drink Alone" Gets New MeaningIn what may be bad news for bars and pubs,a European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those who drink with food.Luigino Dal Maso and his colleagues studied the drinking patterns of 1,500 patients from four cancer studies and another 3,500 adults who had never had cancer.After the researchers accounted for the amount of alcohol consumed,they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity（口腔）,pharynx（咽）,and esophagus（食管）,when compared with people who drank only at meals.Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal cancer（喉癌）."Roughly 95 percent of cancers at these four sites traced to smoking or drinking by the study volunteers,"Dal Maso says.The discouraging news,his team reports,is that drinking with meals didn't eliminate cancer risk at any of the sites.For their new analysis,the European scientists divided people in the study into four groups,based on how many drinks they reported having in an average week.The lowest-intake group included people who averaged up to 20 drinks a week.The highest group reported downing at least 56 cups of alcohol weekly for an average of eight or more per day.Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals.For instance,compared with people in the lowest group,participants who drank 21 to 34 alcohol cups a week at least doubled their cancer risk for all sites other than the larynx.If people in these consumption groups took some of those drinks outside meals,those in the higher consumption group at least quadrupled（四倍）their risk for oral cavity and esophageal cancers.People in the highest-consumption group who drank only with meals had 10 times the risk of oral cancer,7 times the risk of pharyngeal cancer,and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals.In contrast,laryngeal cancer risk in the high-in- take,with-meals-only group was only triple that in the low-intake consumers who drank with meals."Alcohol can inflame（使发炎）tissues. Over time,that inflammation can trigger cancer."Dal Maso says. He suspects that food reduced cancer risk either by partially covering digestive-tract（消化道）tissues or by taking alcohol off those tissues.He speculates that the reason laryngeal risks were dramatically lowerfor all study participants traces to the tissue's lower exposure to alcohol. Which of the four cancers has the lowest risk? A:Oral cancer.B:Laryngeal cancer.C:Pharyngeal cancerD:Esophageal cancer.
共用题干第一篇“Don' t Drink Alone" Gets New MeaningIn what may be bad news for bars and pubs,a European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those who drink with food.Luigino Dal Maso and his colleagues studied the drinking patterns of 1,500 patients from four cancer studies and another 3,500 adults who had never had cancer.After the researchers accounted for the amount of alcohol consumed,they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity（口腔）,pharynx（咽）,and esophagus（食管）,when compared with people who drank only at meals.Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal cancer（喉癌）."Roughly 95 percent of cancers at these four sites traced to smoking or drinking by the study volunteers,"Dal Maso says.The discouraging news,his team reports,is that drinking with meals didn't eliminate cancer risk at any of the sites.For their new analysis,the European scientists divided people in the study into four groups,based on how many drinks they reported having in an average week.The lowest-intake group included people who averaged up to 20 drinks a week.The highest group reported downing at least 56 cups of alcohol weekly for an average of eight or more per day.Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals.For instance,compared with people in the lowest group,participants who drank 21 to 34 alcohol cups a week at least doubled their cancer risk for all sites other than the larynx.If people in these consumption groups took some of those drinks outside meals,those in the higher consumption group at least quadrupled（四倍）their risk for oral cavity and esophageal cancers.People in the highest-consumption group who drank only with meals had 10 times the risk of oral cancer,7 times the risk of pharyngeal cancer,and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals.In contrast,laryngeal cancer risk in the high-in- take,with-meals-only group was only triple that in the low-intake consumers who drank with meals."Alcohol can inflame（使发炎）tissues. Over time,that inflammation can trigger cancer."Dal Maso says. He suspects that food reduced cancer risk either by partially covering digestive-tract（消化道）tissues or by taking alcohol off those tissues.He speculates that the reason laryngeal risks were dramatically lowerfor all study participants traces to the tissue's lower exposure to alcohol. Which of the following is NOT a research finding about"drinking with meals"?A:It lowers cancer risk compared with drinking without food.B:It may be a cause of cancer.C:It does not eliminate cancer risk at any of the four sites.D:It increases by 20 percent the risk of cancer in all the four sites.
共用题干SleepingPeople who sleep for more than eight hours a night do not live as long as those who sleep for six hours,according to the biggest study yet into sleep patterns and mortality（死亡率）.Scientists have no explanation for the findings and do not know if they mean people who like a lie-in（睡懒觉）can extend their lives by sleeping less.Although it is a common belief that sleeping for at least eight hours a night is vital forhealth and well-being,the six-year study involving more than 1.1 million Americans older than 30 found that those who slept for less than eight hours were far from doing themselves any long-term harm."Individuals who now average 6.5 hours of sleep a night can be reassured that this is a safe amount of sleep.From a health standpoint,there is no reason to sleep longer,"said Daniel Kripke , a professor of psychiatry（精神病学）at the University of California, San Diego.Dr. Kripke said,"We don't know if long sleep periods lead to death.Additional studies are needed to determine if setting your alarm clock earlier will actually improve your health."The scientists,who were funded by the American Cancer Society,found that the best survival rates were among the men and women who slept for seven hours a night.Those who slept for eight hours were 12 per cent more likely to die during the six-year period of the study,when other factors such as diet and smoking were taken into account.Even those who spent a mere five hours a night in bed lived longer than those who slept eight or more hours.However,an increasing death rate was found among those who slept for less than five hours.Dr. Kripke said,"Previous sleep studies have indicated that both short-and long-duration （持续时间）sleep had higher mortality rates. However, none of those studies were large enough to distinguish the difference between seven and eight hours a night,until now." Sleeping for less than 5 hours each night is better than sleeping for 5 hours.A:Right B:Wrong C:Not mentioned
共用题干SleepingPeople who sleep for more than eight hours a night do not live as long as those who sleep for six hours,according to the biggest study yet into sleep patterns and mortality（死亡率）.Scientists have no explanation for the findings and do not know if they mean people who like a lie-in（睡懒觉）can extend their lives by sleeping less.Although it is a common belief that sleeping for at least eight hours a night is vital forhealth and well-being,the six-year study involving more than 1.1 million Americans older than 30 found that those who slept for less than eight hours were far from doing themselves any long-term harm."Individuals who now average 6.5 hours of sleep a night can be reassured that this is a safe amount of sleep.From a health standpoint,there is no reason to sleep longer,"said Daniel Kripke , a professor of psychiatry（精神病学）at the University of California, San Diego.Dr. Kripke said,"We don't know if long sleep periods lead to death.Additional studies are needed to determine if setting your alarm clock earlier will actually improve your health."The scientists,who were funded by the American Cancer Society,found that the best survival rates were among the men and women who slept for seven hours a night.Those who slept for eight hours were 12 per cent more likely to die during the six-year period of the study,when other factors such as diet and smoking were taken into account.Even those who spent a mere five hours a night in bed lived longer than those who slept eight or more hours.However,an increasing death rate was found among those who slept for less than five hours.Dr. Kripke said,"Previous sleep studies have indicated that both short-and long-duration （持续时间）sleep had higher mortality rates. However, none of those studies were large enough to distinguish the difference between seven and eight hours a night,until now." The study shows that the longer you sleep each night,the longer you'll live.A:Right B:Wrong C:Not mentioned
共用题干第一篇“Don' t Drink Alone" Gets New MeaningIn what may be bad news for bars and pubs,a European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those who drink with food.Luigino Dal Maso and his colleagues studied the drinking patterns of 1,500 patients from four cancer studies and another 3,500 adults who had never had cancer.After the researchers accounted for the amount of alcohol consumed,they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity（口腔）,pharynx（咽）,and esophagus（食管）,when compared with people who drank only at meals.Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal cancer（喉癌）."Roughly 95 percent of cancers at these four sites traced to smoking or drinking by the study volunteers,"Dal Maso says.The discouraging news,his team reports,is that drinking with meals didn't eliminate cancer risk at any of the sites.For their new analysis,the European scientists divided people in the study into four groups,based on how many drinks they reported having in an average week.The lowest-intake group included people who averaged up to 20 drinks a week.The highest group reported downing at least 56 cups of alcohol weekly for an average of eight or more per day.Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals.For instance,compared with people in the lowest group,participants who drank 21 to 34 alcohol cups a week at least doubled their cancer risk for all sites other than the larynx.If people in these consumption groups took some of those drinks outside meals,those in the higher consumption group at least quadrupled（四倍）their risk for oral cavity and esophageal cancers.People in the highest-consumption group who drank only with meals had 10 times the risk of oral cancer,7 times the risk of pharyngeal cancer,and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals.In contrast,laryngeal cancer risk in the high-in- take,with-meals-only group was only triple that in the low-intake consumers who drank with meals."Alcohol can inflame（使发炎）tissues. Over time,that inflammation can trigger cancer."Dal Maso says. He suspects that food reduced cancer risk either by partially covering digestive-tract（消化道）tissues or by taking alcohol off those tissues.He speculates that the reason laryngeal risks were dramatically lowerfor all study participants traces to the tissue's lower exposure to alcohol. Who are more likely to develop cancer in the mouth and neck?A:People who drink alcohol at meals.B:People who never drink alcohol.C:People who drink alcohol outside of meals.D:People who drink alcohol only at bars and pubs.
共用题干第一篇“Don' t Drink Alone" Gets New MeaningIn what may be bad news for bars and pubs,a European research group has found that people drinking alcohol outside of meals have a significantly higher risk of cancer in the mouth and neck than do those who drink with food.Luigino Dal Maso and his colleagues studied the drinking patterns of 1,500 patients from four cancer studies and another 3,500 adults who had never had cancer.After the researchers accounted for the amount of alcohol consumed,they found that individuals who downed a significant share of their alcohol outside of meals faced at least a 50 to 80 percent risk of cancer in the oral cavity（口腔）,pharynx（咽）,and esophagus（食管）,when compared with people who drank only at meals.Consuming alcohol without food also increased by at least 20 percent the likelihood of laryngeal cancer（喉癌）."Roughly 95 percent of cancers at these four sites traced to smoking or drinking by the study volunteers,"Dal Maso says.The discouraging news,his team reports,is that drinking with meals didn't eliminate cancer risk at any of the sites.For their new analysis,the European scientists divided people in the study into four groups,based on how many drinks they reported having in an average week.The lowest-intake group included people who averaged up to 20 drinks a week.The highest group reported downing at least 56 cups of alcohol weekly for an average of eight or more per day.Cancer risks for the mouth and neck sites rose steadily with consumption even for people who reported drinking only with meals.For instance,compared with people in the lowest group,participants who drank 21 to 34 alcohol cups a week at least doubled their cancer risk for all sites other than the larynx.If people in these consumption groups took some of those drinks outside meals,those in the higher consumption group at least quadrupled（四倍）their risk for oral cavity and esophageal cancers.People in the highest-consumption group who drank only with meals had 10 times the risk of oral cancer,7 times the risk of pharyngeal cancer,and 16 times the risk of esophageal cancer compared with those who averaged 20 or fewer drinks a week with meals.In contrast,laryngeal cancer risk in the high-in- take,with-meals-only group was only triple that in the low-intake consumers who drank with meals."Alcohol can inflame（使发炎）tissues. Over time,that inflammation can trigger cancer."Dal Maso says. He suspects that food reduced cancer risk either by partially covering digestive-tract（消化道）tissues or by taking alcohol off those tissues.He speculates that the reason laryngeal risks were dramatically lowerfor all study participants traces to the tissue's lower exposure to alcohol. According to the last paragraph,tissues'lower exposure to alcohol_________.A:reduces the risk of laryngeal cancerB:explains why inflammation triggers cancerC:accounts for why food can cover digestive-tract tissuesD:is the reason why food can take alcohol off them
根据以下材料，回答Using a computer or smartphone at nightcan cause us to 11 on the pounds, new research has revealed.The study found a link between blue light 12 --blue light is 13 by smartphones and tables--and increasedhunger. It found that exposure to the light increases hunger levels for severalhours and even increases hunger levels 14 eating a meal.Results of the US study show thatblue-enriched light exposure, compared with 15 light exposure, was 16 with an increase in hunger that began 15minutes after light onset and was still present almost two hours after themeal. Blue light exposure has also already been shown to decreased 17 in the evening, increasing the risk ofinsomnia.Study co-author Ivy Cheung, of NorthwesternUniversity in Chicago, said, "A single three-hour exposure toblue-enriched light in the evening 18 impacted hunger andglucose metabolism." "These results are important because theysuggest that 19 environmental light exposure for humansmay represent a novel 20 of influencing food intake patterns andmetabolism."The study group 21 10 healthy adults with regular sleep and eating schedules who received22 carbohydrate-rich meals. They completed afour-day trial 23 dim light conditions, which involvedexposure to less than 20 lux during 16 hours 24 and less than three lux duringeight hours of sleep. On day three they were exposed to three hours of 260 lux,blue-enriched light starting 10.5 hours after waking up, and the effects werecompared with dim light exposure on day two.Ms Cheung said more research is needed todetermine the 25 of action involved in the relationshipbetween light exposure, hunger and metabolism.A.touch B.exposure C.contact D.approach
Which three statements about BGP confederation and route reflectors are true？ （）A、Clusters are used in confederation schemes to avoid loops.B、BGP network can have a confederation within a route reflector area.C、An internal BGP network cannot have a route reflector within a confederation.D、An internal BGP network can have a route reflector within a confederation.E、Clusters are used in route reflector schemes to avoid loops.F、BGP network cannot have a confederation within a route reflector area.
单选题The AMVER system requires（）.ASailing plans to be sent before departureBMore frequent reports in heavy weatherCArrival reports to be sent within 8 hours of arrivalDA position report within 24 hours of departure
问答题Practice 2 Directions: Read the text below. Write an essay in about 120 words, in which you should summarize the key points of the text and make comments on them. Try to use your own words. Television can be a wonderful learning tool. Thirty years ago, some television program helped my sons learn to read, count, socialize and cope with feelings. Nature programs on public television taught them an enormous respect for the world at large and the creatures within it. The basic rule of my family was, “When it’s light out, you’re out”—that is, playing outdoors. With little TV, they were two strong, athletic children who grew up in a home without junk food, did not bother their parents to buy things they saw advertised, never smoked or drank alcohol and knew more about wildlife than the leader of a trip to Kenya. Unfortunately, our experience with television is rarely had by other families. These days, Sitting passively in front of the TV for hours is harmful for the bodies and minds of the nation’s children. Studies have documented unhealthy effects on weight, attention span, reading skills and socialization among children who spend hours a day watching television or playing video games. The average young child in this country watches about four hours of television a day and each year sees tens of thousands of commercials, often for high-fat, high-sugar or high-salt snacks and foods; thousands of episodes of violence; and countless instances of alcohol use and inappropriate sexual activity. By the time American children finish high school, they have spent nearly twice as many hours in front of the television set as in the classroom.
单选题According to the passage, what would happen to healthy cells within 48 hours of exposure to radio waves?AThe number of healthy cells will keep declining as more and more of them die.BThe number of healthy cells will initially drop before recovering rapidly.CThe number of healthy cells will be on steady increase throughout the process.DThe scientists have not yet arrived at any conclusion on this issue.
单选题Patients are now advised to ______.Amonitor the hours of doctors by themselvesBmake sure that the doctors who treat them have had enough sleepCask for legal control of the hours of doctorsDallow their doctors to sleep several hours before the operation
单选题Fire protection and manning regulations for towing vessels state that the Master or person in charge must ensure that all crew members who have not participated in the drills or received the safety orientation（）.Areceive a safety orientation or view a videotape before the vessel gets underwayBview a videotape on safety procedures within 48 hours of reporting for dutyCreceive a safety orientation within 24 hours of reporting for dutyDnone of the above
问答题Drinking too much alcohol can lead to alcohol dependency, accidents, liver damage and so on. Connections have been made between heavy drinking and cancer of the mouth, strokes, raised blood pressure, increased infertility, A host of other unwelcome conditions have also been reported, which casts a shadow over even light social drinking. And in the United States women have been persuaded that any alcohol consumption during pregnancy “may lead to birth defects”, a message printed on every bottle of wine in commercial circulation.
单选题After abandoning a vessel，water that is consumed within the first 24 hours will（）.Apass through the body with little absorbed by the systemBhelp to prevent fatigueCquench thirst for only 2 hoursDhelp to prevent seasickness
多选题Which three statements about BGP confederation and route reflectors are true？ （）AClusters are used in confederation schemes to avoid loops.BBGP network can have a confederation within a route reflector area.CAn internal BGP network cannot have a route reflector within a confederation.DAn internal BGP network can have a route reflector within a confederation.EClusters are used in route reflector schemes to avoid loops.FBGP network cannot have a confederation within a route reflector area.
问答题Teenagers who don't get enough rest have more learning, health, behavior and mood problems than students who get at least nine hours a night.
单选题On a vessel making a voyage more than 48 hours long，regulations require that（）.Aa lifeboat drill be held within 12 hours prior to departureBfire pumps be tested by starting within 12 hours prior to departureCthe emergency generator and lighting system be tested by starting and operating within 12 hours prior to departureDthe entire steering gear be tested within 12 hours prior to departure