大學英語六級閱讀理解練習及答案

　　下面是小編給大家整理的，希望對大家有幫助。

　　Laziness is a sin***罪***, everyone knows that. We have probably all had lectures pointing out that laziness is immoral, that it is wasteful, and that lazy people will never amount to anything in life. But laziness can be more harmful than that, and it is often caused by more complex reasons rather than simple wish to avoid work. Some people who appear to be lazy are suffering from much more serious problems. They may be so distrustful of their fellow workers that they are unable to join in any group task for fear of ridicule or of having their idea stolen. These people who seem lazy may be ruined by a fear of failure that prevents fruitful work. Or other sorts of fantasies ***幻想*** may prevent work; some people are so busy planning, sometimes planning great deals of fantastic achievements that they are unable to deal with whatever "lesser" work is on hand. Still other people are not avoiding work; strictly speaking, they are merely procrastinating rescheduling their day.

　　Laziness can actually be helpful. Like procrastinators, some people may look lazy when they are really thinking, planning, researching. We should all remember that great scientific discoveries occurred by chance. Newton wasn't working in the orchard when the apple hit him and he devised the theory of gravity. All of us would like to have someone "lazy" build the car or stove we buy, particularly if that "laziness" were caused by the worker's taking time to

　　check each step of his work and to do his job right. And sometimes, being "lazy"—that is,, taking time off for a rest—is good for the overworked students or executives. Taking a rest can be particularly helpful to the athlete who is trying too hard or the doctor who's simply working himself overtime too many evenings at the clinic. So be careful when you're tempted to call someone lazy. That person may be thinking, resting, or planning his or her next work.

　　26. The main idea of this passage is that_______.

　　A. laziness is a moral sin

　　B. there are advantages and disadvantages in being lazy

　　C. laziness is the sign of deep-seated emotion problems

　　D. lazy people do more careful work

　　27. The passage states that_______.

　　A. laziness is a disease

　　B. laziness is more beneficial than harmful

　　C. a good definition of laziness is emotional illness

　　D. some people appear lazy because they are insecure

　　28. Which of the following conclusions does the passage support?

　　A. Most of the time laziness is a virtue.

　　B. Most assembly workers are lazy.

　　C. The word laziness is sometimes applied incorrectly.

　　D. Most insecure people are lazy.

　　29. As used in this passage, the word "devised"***Para. 2*** means_______.

　　A. understood B. wrote

　　C. made D. proved

　　30. Being lazy may be good for_______.

　　A. doctors B. athletes

　　C. executives D. those who overwork themselves

　　26. B 27. D 28. C 29. C 30. D

　　Plastics are materials which are softened by heat and set into lasting form when shaped in a mold. Some are natural; some are semi-synthetic***半合成的*** , the result of chemical action on natural substance; some are synthetic, built up from the constituents of oil or coal. All are based on the chemistry of carbon, with its capacity for forming chains. The molecules that compose them ***monomers*** link together in the setting or curing***硫化*** process to form chains ***polymers*** , which give plastics their flexible strength. Some plastics retain their ability to be softened and reshaped; like wax, they are thermoplastic. Others set permanently in the shapes they are given by heat and pressure; like eggs, they are thermosetting.

　　From industrial beginnings in the nineteenth century, plastics have struggled through a hundred and twenty years of glory, failure, disrepute and suspicion on the slow road to public acceptance. Now, at last, one can positively say that plastics are appreciated and enjoyed for what they are; that they make modern life richer, more comfortable and convenient, and also more fun. Plastics are warm materials, sympathetic to the human touch, and their transformation into things that come into contact with human beings is entirely appropriate.

　　The fact that there are plastic antiques comes as a shock to most people. How can a material that seems so essentially twentieth century, and one that is so much associated with cheap, disposable products, has a history at all? It is a young technology, and a great part of the fun of collecting plastics is that beautiful pieces of historical interest can still be found very cheaply.

　　21. The word "sympathetic" in Paragraph 2 most probably means_______.

　　A. harmful B. agreeable

　　C. pitiful D. sorry

　　22. It can be concluded from this passage that_______.

　　A. plastics are synthetic materials

　　B. plastics won public acceptance 120 years ago

　　C. plastics are very harmful in modern life

　　D. plastics are cheap as antiques

　　23. Which of the following is essential to create any type of plastics? A. Carbon. B. Eggs.

　　C. Oil. D. Coal.

　　24. Plastics that harden into permanent shapes are called_______.

　　A. chained B. thermoplastic