大学英语一级教程练习题答案第三单元

大学英语一级教程练习题答案（第三单元）

　　Part I Pre-reading Task

　　Script for the recording:

　　This unit begins with an article on science. Before you read it, let me tell you something about its author, Stephen Hawking.

　　Hawking is perhaps the most well-known scientist since Einstein. Like Einstein his work tackles the big questions, questions such as How did the universe begin? Why is the universe the way it is? and How will it end? He is now working on what is sometimes known as the 'theory of everything.' Among other things, this promises to explain what caused the Big Bang that started the universe.

　　But it is not simply the power of Hawking's mind that has led to his fame. For what many people find most striking about him is the contrast between the strength of his mind and the weakness of his body. For for many years Hawking has suffered from an illness that has left him unable to move and to speak normally.

　　Born in England in 1942, Hawking had a normal childhood, and it was not until he was a student at university that his illness started to affect him. Hospital tests showed he was suffering from a disease that weakens control over the muscles. The disease gets worse with time and there is no known cure. But Hawking did not lose heart. As he says, "although there was a cloud hanging over my future, I found, to my surprise, that I was enjoying life more than before. I began to make progress with my research, and I got engaged to a girl called Jane Wilde. That engagement changed my life. It gave me something to live for."

　　Hawking started research at Cambridge and went on to hold the same post that another great scientist, Newton, once held. Over the years his condition has worsened, but even when he finally lost the ability to speak, he managed to get round the problem. He now uses a computer that enables him to select words which are then turned into speech. "The only trouble," the English scientist says, "is that it gives me an American accent!"

　　- 102 - Appendix I

　　Part II Text A

　　Text Organization

　　2. 1) The importance of the teaching of science in schools.

　　2) The role mass media can play, especially what television can do.

　　Vocabulary

　　2) brief

　　4) cut...off

　　6) anyway

　　8) moreover

　　10) in the form of

　　12) initiative

　　14) fit into

　　inquired

　　in terms of

　　tend

　　precise

　　grasped

　　sufficient

　　convey

　　in two minds

　　Winning the match today has ensured their team a place in the Cup Final. Susan was not informed of the reasons why she was dismissed. These computer games entertain as well as educate the learner. No living thing can do without air and water. The election is likely to be held in June.

　　The film's appeal lies in not only the entertainment it provides to the audience but also the questions it raises about the possible contact between human beings and alien civilizations.

　　2) The decision on the new project is made on the basis of scientific study. The project is

　　Appendix I - 103 -

　　likely to succeed despite the fact that we do not have sufficient funds at the moment.

　　3) True it is hard to make accurate predictions (预言), but the steady growth of the informa-tion industry ensures that this line of products will be highly profitable.

　　II. Prefixation

　　1. regained

　　3. undersupplied

　　5. precondition

　　7. mispronounced

　　2. undecided 4. disabled

　　6. foresight

　　8. enrich

　　III. Antonyms

　　2. 1)majority

　　3) increased

　　5) local

　　7) wrong

　　2) accepted

　　4) weaknesses

　　6) late

　　8) false

　　Structure

　　1) My income is now twice as much as I used to earn two years ago.

　　2) I am wearing only half as much as I usually do because of the warm weather.

　　3) If you had spent half as much time on your studies as your elder sister did, you could have made the honor roll.

　　4) I could eat/could have eaten as much again if the doctor had not told me to go on a diet.

　　1) As is shown by the growth rate of GDP in the last two decades, China's reform and open policy is a great success.

　　2) As is predicted by some newspapers, there will be a substantial cut in tax on imported cars in

　　- 104 - Appendix 1

　　the coming year.

　　3) As is proved by the records, China's human rights situation has been steadily improving over the years.

　　4) The failure of the joint venture was not, as was assumed by outsiders, because of lack of capital, but because of poor management.

　　Comprehensive Exercises

　　I. Cloze

　　II. Translation

　　It is hard to imagine how our forefathers could do without so many conveniences that modern technology has brought about. Back then only a small proportion of the population en-joyed some comforts. The majority didn't even have sufficient food, not to speak of/let alone the privilege of being educated. However, many people blame modern technology for the problems it has created. They want to slow down the rate of progress. But no one can put the clock back. The best we can do is to make informed decisions as to the direction in which technology is to develop.

　　Appendix I

　　105

　　Part III TextB

　　Comprehension Check

　　l.d

　　3. a 5. c 7. b

　　2. b

　　4. c

　　6. a

　　Translation

　　(参见 Appendix III)

　　Language Practice

　　1. outcome

　　3. yield

　　5. worn down

　　7. amount

　　9. proposed

　　11. Somehow

　　13. process

　　15. challenges

　　2. frustrating

　　4. Failure

　　6. conclusions

　　8. professional 10. evaluating 12. bulk

　　14. step by step

　　Part IV Theme-related Language Learning Tasks

　　Model paper

　　How Science Changes Our Lives

　　Science has certainly changed our lives, bringing benefits to some and hardships to others. Computers, for example, have provided some with the comfort of working from home while at the same time throwing others out of work as their jobs are automated. In the future changes are likely to be even much greater as science reaches out to shape life itself. New organisms (有机体) are already being engineered. New genetically modified crops promise benefits from higher yields and less use of harmful chemicals.

　　But once again we cannot be sure that science will only change our lives for the better. The possibility remains that some modern Frankenstein may carelessly or deliberately let loose a new and

　　- 106- Appendix I

　　dangerous form of life. However, we should have sufficient faith in the good sense of the public to

　　believe that we could prevent this from happening. (146 words)

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