单选题The author thinks that ______.Apacking is actually useless and could be ignoredBpeople will soon stop using packaging altogetherCenough research has been done into recyclingDit is better to produce new materials than to re-use old ones
单选题
The author thinks that ______.
A
packing is actually useless and could be ignored
B
people will soon stop using packaging altogether
C
enough research has been done into recycling
D
it is better to produce new materials than to re-use old ones
参考解析
解析：
先看四个选项的意思：A“实际上包装很没用，可以被忽略”，B“不久人们就会停止使用包装”，C“在回收再利用方面已经有了足够的研究成果”，D“发掘新材料好过回收利用旧的材料”。由文章可知，只有少数包装是有用的，绝大多数包装只是为了吸引消费者，而消费者对包装并不感兴趣f并且专家认为解决污染问题的唯一途径是不再用塑料包装物。可总结得出：包装并无多大用处，我们可以忽略它。故选A。
先看四个选项的意思：A“实际上包装很没用，可以被忽略”，B“不久人们就会停止使用包装”，C“在回收再利用方面已经有了足够的研究成果”，D“发掘新材料好过回收利用旧的材料”。由文章可知，只有少数包装是有用的，绝大多数包装只是为了吸引消费者，而消费者对包装并不感兴趣f并且专家认为解决污染问题的唯一途径是不再用塑料包装物。可总结得出：包装并无多大用处，我们可以忽略它。故选A。
相关考题：
When John and Victoria Falls arrived in New York City for one-year stay, they did not bring very many things with them. They had planned either to live in a furnished apartment or to buy used furniture. But they soon learned about a new system that more and more people are using. The renting of home furnishings (bed, tables, dishes, and so on) has become one of America’s fastest growing businesses.What kinds of people rent tent officials, foreign students, airline workers, young married couples - people whose job or buw homes. Young people with little money do not want to buy cheap furniture that they may soon dislike. They prefer to wait until they have enough money to buy furniture they really like. Meanwhile, they find they can rent better quality furniture than they could afford to buy.One family, who now have a large, beautiful home of their own, liked their rented furniture so much that they decided to keep renting it instead of buying new things. But usually people don’t like to tell others about it. The idea of renting home furnishings is still quite new, and they are not sure what their neighbors might think.11.Which of the following has become one of America’s fastest growing businesses?A.Selling home furnishings.B.Renting furnished apartments.C.Selling used furniture.D.Renting home furnishings.12.Why do some people prefer to rent furniture?A.Because the furniture they get in this way is new.B.Because it saves them a lot of money.C.Because it saves them much trouble and money.D.Because they can always get better quality furniture in this way.13.What can you infer from the passage?A.The idea of renting furniture is not acceptable.B.Renting furniture is not popular in the couple’s home town.C.Only those who don’t have enough money to rent furniture.D.People usually grow to like the furniture they have rented.14.Which of the following can best serve as the title of the passage?A.Rent or Buy?B.A New Way of Getting Home Furnishings.C.Furnished Apartments.D.A New Idea.15.Young people liked renting home furniture because_________A.they have less money.B.they don’t want to buy old furniture.C.the new furniture is of good quality.D.they don’t have much money and don’t want to buy the cheap furniture.
The author thinks that replacing gas with corn ethanol is.A. impracticalB. acceptable C. admirable D. useless
Much research( ) into the possibiecauses of the disease in the past few years. A.has been doneB.was doneC.have been doneD.were done
By saying "the world has been spared a t.rue water war" (Line 1, Para.4), the author means（ ）[A] the water supply in the world is more than needed[B] the world has saved enough water to avoid the war[C] the world has never suffered a war triggered by water[D] the world spares no effort to avoid a war caused by water
Thousands of papers are submitted every month to the platforms arXiv and bioRxiv,which make manuscripts available before they have been peer reviewed and accepted by a journal.Scientists applaud preprints because they enable researchers to claim priority and make their findings available more quickly,unshackled from sluggish and tyrannical journals.This might make sense within the scientific community,but this method of publication holds substantial risks for the broadcr community-risks that are not being given proper consideration by the champions of preprint.Weak work that hasn't been reviewed could get overblown in the media.Conversely,better work could be ignored.Many people still learn about science the same way they learn about Syria or the World Cup:through news sites,television and radio.The bulk of research reported through these channels is peer reviewed.A few days before a paper is published,the science journal will issue a restricted press release to qualified journalists under an agreement that no one will report on the paper until a designated time.The system has its flaws,but it does give reporters time to assess the research and gather expert reaction.Contrast this with preprints.As soon as research is in the public domain,there is nothing to stop a journalist writing about it,and rushing to be the first to do so.Imagine early findings that seem to show that climate change is natural or that a common vaccine is unsafe.Preprints on subjects such as those could,if they become a story that goes viral,end up misleading millions,whether or not that was the intention of the authors.Another risk is the inverse-and this one could matter more to some researchers.Under the preprint system,one daring journalist searching through the servers can break a story;by the time other reporters have noticed,it's old news,and they can't persuade their editors to publish.There have been cases in which a preprint that garnered news stories got a second wave of coverage when it was published in a journal.But generally,the rule is'it has to be new to be news'.It is not enough to shrug and blame journalists,and it is unhelpful to dismiss those journalists who can accurately convey complex science to a mass audience.Journalists do include appropriate warnings or even decide not to run a story when conclusions are uncertain,but that happens only because they have been given enough time and breathing space to assess it.If the scientific community isn't careful,preprints coulcl take that resource away.How can we have preprints and support good journalism?Should scientific societies or preprint advocates develop guidelines for what should and should not be posted as a preprint?Should all preprints be emblazoned with a warning aimed at journalists that work has not been peer reviewed'?Preprints could bring great prizes for science.But these questions must be brought up now,so that public understanding is not damaged as preprints flourish.The author argues in Paragraph 6 that journalistsA.are mainly to blame for spreading bad science.B.can help the audience recognize faulty research.C.should be given more time to evaluate research.D.have to respect the uncertainty inherent in science.
Another important factor is the technical efficiency of a country’s people.Old countries that have numerous（ ）craftsmen are better placed to produce wealth than countries whose workers are largely unskilleD.Furthermore,wealth also produces wealth.A.skillfulB.skilledC.capableD.shrewd
Thousands of papers are submitted every month to the platforms arXiv and bioRxiv,which make manuscripts available before they have been peer reviewed and accepted by a journal.Scientists applaud preprints because they enable researchers to claim priority and make their findings available more quickly,unshackled from sluggish and tyrannical journals.This might make sense within the scientific community,but this method of publication holds substantial risks for the broadcr community-risks that are not being given proper consideration by the champions of preprint.Weak work that hasn't been reviewed could get overblown in the media.Conversely,better work could be ignored.Many people still learn about science the same way they learn about Syria or the World Cup:through news sites,television and radio.The bulk of research reported through these channels is peer reviewed.A few days before a paper is published,the science journal will issue a restricted press release to qualified journalists under an agreement that no one will report on the paper until a designated time.The system has its flaws,but it does give reporters time to assess the research and gather expert reaction.Contrast this with preprints.As soon as research is in the public domain,there is nothing to stop a journalist writing about it,and rushing to be the first to do so.Imagine early findings that seem to show that climate change is natural or that a common vaccine is unsafe.Preprints on subjects such as those could,if they become a story that goes viral,end up misleading millions,whether or not that was the intention of the authors.Another risk is the inverse-and this one could matter more to some researchers.Under the preprint system,one daring journalist searching through the servers can break a story;by the time other reporters have noticed,it's old news,and they can't persuade their editors to publish.There have been cases in which a preprint that garnered news stories got a second wave of coverage when it was published in a journal.But generally,the rule is'it has to be new to be news'.It is not enough to shrug and blame journalists,and it is unhelpful to dismiss those journalists who can accurately convey complex science to a mass audience.Journalists do include appropriate warnings or even decide not to run a story when conclusions are uncertain,but that happens only because they have been given enough time and breathing space to assess it.If the scientific community isn't careful,preprints coulcl take that resource away.How can we have preprints and support good journalism?Should scientific societies or preprint advocates develop guidelines for what should and should not be posted as a preprint?Should all preprints be emblazoned with a warning aimed at journalists that work has not been peer reviewed'?Preprints could bring great prizes for science.But these questions must be brought up now,so that public understanding is not damaged as preprints flourish.The author suggests in the last paragraph that preprintsA.are incompatible with good journalism.B.should be forbidden for quality concerns.C.are usually misinterpreted by journalists.D.could promote confusion and distortion.
共用题干New Understanding of Natural Silk's MysteriesNatural silk,as we all know,has a strength that man-made materials have long struggled to match.In a discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT re- searchers have discovered that silk gets its strength from its weakness.Or,more specifically,its many weak- nesses. Silk gets its extraordinary durability and ductility（柔韧性）from an unusual arrangement of hydrogen bonds that are intrinsically very weak but that work together to create a strong,flexible structure.Most materials一especially the ones we engineer for strength一get their toughness from brittleness.As such,natural silks like those produced by spiders have long fascinated both biologists and engineers because of their light weight,ductility and high strength(pound for pound,silk is stronger than steel and far less brittle). But on its face,it doesn't seem that silks should be as strong as they are;molecularly,they are held together by hydrogen bonds , which are far weaker than the covalent（共价的）bonds found in other molecules.To get a better understanding of how silk manages to produce such strength through such weak bonds, the MIT team created a set of computer models that allowed them to observe the way silk behaves at the atomic level. They found that the arrangement of the tiny silk nanocrystals（纳米晶体）is such that the hydro- gen bonds are able to work cooperatively,reinforcing one another against external forces and failing slowlywhen they do fail,so as not to allow a sudden fracture to spread across a silk structure.The result is natural silks that can stretch and bend while retaining a high degree of strength.But while that's all well and good for spiders,bees and the like,this understanding of silk geometry could lead to new materials that are stronger and more ductile than those we can currently manufacture.Our best and strongest materials are generally expensive and difficult to produce(requiring high temperature treatments or energy-intensive processes).By looking to silk as a model,researchers could potentially devise new manufacturing methods that rely on inexpensive materials and weak bonds to create less rigid,more forgiving materials that are nonetheless stronger than anything currently on offer. And if you thought you were going to get out of this materials science story without hearing about carbon nanotubes（纳米碳管）, think again. The MIT team is already in the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural silk-like carbon nanotubes. Super-silks are on the horizon.The MIT team had tried different materials before they studied natural silk in their research.A:RightB:WrongC:Not mentioned
Many people use wood stoves and fireplaces to heat their homes．Scientists have become worried about the smoke that they give off．Harmful chemicals are in the smoke．The smoke is causing air pollution．The pieces of pollution,called soot,are floating in the air．They are too tiny to see．Scientists must use a microscope to see them. Small amounts of soot are safe,but large amounts can be dangerous．The govenment wants to limit this kind of pollution．It may stop people from using their fireplaces. The air is tested every day．When soot levels are high,more than 65 micrograms of soot per cubic meter,factories must stop making smoke．The government thinks that limit should be much lower.Factories produce the most smoke and soot．But the government thinks that all types of burning should be limited．The soot levels from factories and homes could be limited．Home owners may have to install new wood stoves that they comply with the new law．Or,they may not be able to bum on days when the air quality is bad. Residents of some towns are fined if they violate the burning ban．Scientists hope these new regulations will make the air cleaner and less harmful to breathe.What could home owners do to comply with the new regulation?A.Write a letteB.Ask for permissioC.Use more electricitD.Install new low-soot fireplace
Many people use wood stoves and fireplaces to heat their homes．Scientists have become worried about the smoke that they give off．Harmful chemicals are in the smoke．The smoke is causing air pollution．The pieces of pollution,called soot,are floating in the air．They are too tiny to see．Scientists must use a microscope to see them. Small amounts of soot are safe,but large amounts can be dangerous．The govenment wants to limit this kind of pollution．It may stop people from using their fireplaces. The air is tested every day．When soot levels are high,more than 65 micrograms of soot per cubic meter,factories must stop making smoke．The government thinks that limit should be much lower.Factories produce the most smoke and soot．But the government thinks that all types of burning should be limited．The soot levels from factories and homes could be limited．Home owners may have to install new wood stoves that they comply with the new law．Or,they may not be able to bum on days when the air quality is bad. Residents of some towns are fined if they violate the burning ban．Scientists hope these new regulations will make the air cleaner and less harmful to breathe.What happens to some residents who bum too much wood?A.They could lose their homeB.They pay for the punishmenC.They get sick from the smokD.The fire could get out of contro
Many people use wood stoves and fireplaces to heat their homes．Scientists have become worried about the smoke that they give off．Harmful chemicals are in the smoke．The smoke is causing air pollution．The pieces of pollution,called soot,are floating in the air．They are too tiny to see．Scientists must use a microscope to see them. Small amounts of soot are safe,but large amounts can be dangerous．The govenment wants to limit this kind of pollution．It may stop people from using their fireplaces. The air is tested every day．When soot levels are high,more than 65 micrograms of soot per cubic meter,factories must stop making smoke．The government thinks that limit should be much lower.Factories produce the most smoke and soot．But the government thinks that all types of burning should be limited．The soot levels from factories and homes could be limited．Home owners may have to install new wood stoves that they comply with the new law．Or,they may not be able to bum on days when the air quality is bad. Residents of some towns are fined if they violate the burning ban．Scientists hope these new regulations will make the air cleaner and less harmful to breathe.Why is it dangerous to burn too much wood?A.The fire could burn yoB.It's not healthy to be too warC.Harmful chemicals are released in the soD.The smoke is filled with un see able tiny piece
Construction on a new wing at the Markunas Museum ____as soon as additional funding has been arranged.A.has been resumedB.to be resumingC.was resumedD.will resume
Research Is a State of Mind For many years there has been much misunderstanding as to just what research is. The popular conception seems to be that there is something mysterious about it， and before any research can be done it is necessary to have expensive scientific apparatus and large， elaborately equipped laboratories. Actually， this is not so. （6） It is a simple， organized way of trying to accomplish something you wish to do—so simple that anyone can do research anywhere at any time. First， you select the problem you would like to solve， then you list at least ten reasons why it has not been solved. （7） It takes just as much effort to solve a useless problem as a useful one. （8） After carefully—and I want to emphasize that word “carefully”—selecting the problem and the ten things between you and the solution， you then use the same procedure as in solving a crossword puzzle.（9）In the solution of the remaining obstacles you may need some simple apparatus， but the things you will probably need most are infinite patience and persistence. Few people realize the difficulties of doing any new thing. Maybe one of the reasons people are so easily discouraged is because of their education. During all our years at school we were examined two or three times a year. If we failed once， we were out. （10）If we are going to make progress， we must learn to fail intelligently so that we won't become discouraged at the 99.9 per cent failure.9.（）A、Make sure the game is worth the candle.B、That is a step in the right direction， but I don't believe it is enough.C、You take the easy obstacles first and by a process of elimination you eventually arrive at the one or two major ones.D、But in selecting the problem， you need to be sure to analyze it carefully to see that it is worth the effort.E、Research isn't a physical thing at all； it's a state of mind.F、By contrast， all research work is 99. 9 per cent failure and， if we succeed once， we are in.
I think your sister is old enough to know （） to spend all her money on fancy goods.A、better thanB、thanC、other thanD、rather than
单选题By saying “condemning all of us to remain boys and girls forever, jogging and doing push-ups against eternity”, the author means that .Ashe thinks people shouldn’t be so concerned about physical fitnessBshe feels too old and tired to do such hard exerciseCAmerican society is overemphasizing youth and physical appearanceDwhat happened to children centuries ago may occur to adults in America soon
问答题练习14 Research has also been done into the way people’s behavior changes in a number of small, apparently unimportant ways when they lie. It has been found that if they are sitting down at the same time, they tend to move about in their chairs more than usual.
单选题From the last paragraph the author tells us that ______.Aeconomy is the only reason for small car’s popularity.Bthe size of a car also does matter to people in their 20sCHonda is better than Suburban in terms of quality.Dsmall car already has been popular for 10 years.
单选题Research Is a State of Mind For many years there has been much misunderstanding as to just what research is. The popular conception seems to be that there is something mysterious about it， and before any research can be done it is necessary to have expensive scientific apparatus and large， elaborately equipped laboratories. Actually， this is not so. （6） It is a simple， organized way of trying to accomplish something you wish to do—so simple that anyone can do research anywhere at any time. First， you select the problem you would like to solve， then you list at least ten reasons why it has not been solved. （7） It takes just as much effort to solve a useless problem as a useful one. （8） After carefully—and I want to emphasize that word “carefully”—selecting the problem and the ten things between you and the solution， you then use the same procedure as in solving a crossword puzzle.（9）In the solution of the remaining obstacles you may need some simple apparatus， but the things you will probably need most are infinite patience and persistence. Few people realize the difficulties of doing any new thing. Maybe one of the reasons people are so easily discouraged is because of their education. During all our years at school we were examined two or three times a year. If we failed once， we were out. （10）If we are going to make progress， we must learn to fail intelligently so that we won't become discouraged at the 99.9 per cent failure.6.（）AMake sure the game is worth the candle.BThat is a step in the right direction， but I don't believe it is enough.CYou take the easy obstacles first and by a process of elimination you eventually arrive at the one or two major ones.DBut in selecting the problem， you need to be sure to analyze it carefully to see that it is worth the effort.EResearch isn't a physical thing at all； it's a state of mind.FBy contrast， all research work is 99. 9 per cent failure and， if we succeed once， we are in.
单选题AShe thinks she needs more acting experience.BShe is excited about learning new acting skills.CShe thinks she is not very skilled at acting.DShe thinks she is better at acting than directing.
问答题Practice 11 (1) Research has also been done into the way people’s behavior changes in a number of small, apparently unimportant ways when they lie. (2) It has been found that if they are sitting down at the same time, they tend to move about in their chairs more than usual. To the trained observer they are saying “I wish I were somewhere else now.”
单选题By saying “raw materials do not exist, they are created” the author means _____.Athat there will be no more raw materials on the earth some time later, and man will have to create materials by themselvesBthat it is use that makes raw materials valuableCthat people have created various useful materials by using their intelligence and wisdomDhuman creativity is amazing
单选题The author thinks that the conclusions of any research about people’s state of mind are _____.AsurprisingBconfusingCillogicalDquestionable
单选题On notification by Admiralty Notice to Mariners that a new edition of one of the books，or a new supplement to one，has been published，it should be obtained（）.Aas soon as possibleBprior to its publicationCin advance of any possible accidentDby means of other than airmails
单选题The first paragraph tells us that a new product is _____.Anot easily accepted by the publicBoften inferior to old ones at firstCoften more expensive than old onesDusually introduced to satisfy different tastes
单选题The author thinks that _____.Amany people have labored to be leadersBleaders are beyond our understandingCthe essence of leadership has not been graspedDthe definitions of leadership should vary
单选题— Could you tell me ______?— More than a year.Ahow soon will Yangzhou-Taizhou Airport be builtBhow long has Yangzhou-Taizhou Airport been in serviceChow soon Yangzhou-Taizhou Airport will be builtDhow long Yangzhou-Taizhou Airport has been in service
单选题______ has been done to stop pollution caused by traffic.ALotBMuchCFewDNone