大学英语四级模拟试题9.docx

1、大学英语四级模拟试题9大学英语四级模拟试题(9)Directions: There are four reading passages in this part. Each passage is followed by some questions. For each question there are four suggested answers marked A, B, C and D. You should choose the one best answer and blacken the corresponding letter on the ANSWER SHEET with a

2、 pencil. Passage 1How do you send a message to a submerged submarine, particularly one carrying mi Water may not look like a barrier to communications, but appearances are deceiving. Water strongly absorbs all electromagnetic waves except blue green light and extremely low frequency radio waves. The

3、 very low frequency waves now used to contract submarines penetrates only a short distance into the ocean, so the craft must either surface or send up and antenna (天线) to receive messages, thereby increasing its weakness. A laser system - accurate over long distances and capable of carrying more dat

4、a than the very low frequency waves - would talk to submarine at their normal depths.In the system, a very broad beam spreading out freely in all directions would be scanned (扫描) over thousands of square miles of ocean so that it wouldnt endanger boats, birds or fishor the submarines it is supposed

5、to reach.Since only a small fraction of the laser system will make its way through the air and ocean, receivers mounted on the submarines must be able not only to detect the laser but also to discriminate between it and sunlight. So, military scientists are now working hard on special filter that al

6、low through only the precise wavelengths emitted by the laser. The filtered light, when transformed into electrical signal, can then be decoded. Military planners are confident that laser communication with submarines is feasible.1. Which of the following does the passage mainly discuss?A. Missiles

7、carried by submerged submarines.B. Messages sent by submerged submarines.C. Blue-green lasers used by submerged submarines.D. The way to send a message to submerged submarines.2. Which of the following is TRUE according to the passage?A. Water is a barrier to radio communication.B. Lasers have found

8、 wide application in submarine communication.C. Water absorbs all kinds of electromagnetic waves.D. Very low frequency radio waves cannot be used to contact submarines.3. Which of the following is NOT true of a laser system?A. It is able to make its way through water.B. It is able to communicate wit

9、h submarines at work.C. Its beam reaches a submerged submarine with the help of an antenna.D. It is able to carry more data than low frequency waves.4. The reference word “it” (Sentence 1, para.3) refers to .A. the air B. the laser beam C. the ocean D. the submarine5. Who would be very much interest

10、ed in the passage?A. Missile builders B. Military scientists C. Fishermen D. Ship builderPassage 2The West begun to take more notice of the East. The fifth volume of an enormous work re-assessing the Chinese contribution to science and technology is to be published next year. The first volume, which

11、 was published twenty years ago, set the tone for the whole work. In it, evidence was given to show that many inventions which, until then, western historians had claimed for Europe, were made first in China. The attempt to rewrite the intellectual history of the world was not received without prote

12、st by some reputable historians. However, the evidence that has been presented so far in the first four volumes has persuaded many historians who were skeptical at first. Chinas invention of paper, printing, the magnetic compass and gunpowder has never been disputed, but this new history has added a

13、dvanced bridge design, mechanical clocks, paddle boats and many other inventions to the list. In the four volumes published so far no attempt has been made to explain why China has not kept up with the West in science and technology in modern times. It is probable that the answer is to be found in t

14、he social and economic history of China, where a static society under a relatively benevolent regime of scholar-gentry contrasts with the potentially revolutionary and dynamic society of the West at the end of the Middle Ages. In recent years, the Chinese government has been making every effort to c

15、atch up with the West again, and there is little doubt that the gap is being reduced year by year. But will China avoid the Wests mistakes? 6. So far, how many volumes have been published? A. Five. B. Four. C. Three. D. None. 7. The first volume was published . A. ten years agoB. last year C. five y

16、ears ago D. twenty years ago 8. In Line 7, the word “skeptical means . A. doubtful B. worried C. sad D. angry 9. Which of the following is not mentioned in the passage? A. Gunpowder. B. Needle. C. Paddle boats. D. Bridge design.10. The best title for this passage is . A. Chinas Inventions B. Compari

17、sons Between the East and the West C. China Is Catching Up D. Situations in China Passage 3Within fifteen years Britain and other nations should be well on with the building of huge industrial complexes for the recycling of waste. The word rubbish could lose its meaning because everything which goes

18、 into the dustbin would be made into something useful. Even the most dangerous and unpleasant wastes would provide energy if nothing else. The new concept of recycling waste is taking shape at the British technological laboratory at Warren Spring, not far from the north of London. Today, the laborat

19、ory spends four times as much money in studying recycling as it did five years ago. The latest project is to take a city of around half a million inhabitants and discover exactly what raw materials go into it and what go out. The aim is to find out how much of these raw materials could be provided i

20、f a plant for recycling waste were built just outside the city. This plant would recycle not only metal such as steel, lead and copper, but also paper and rubber as well. Methods have been discovered, for example, for removing the ink from newsprint so that the paper can be used again, and for obtai

21、ning valuable oils and gases from old motor car types. All these ideas are already being made use of, but what is new is the idea of combining them on such a large scale in a single plant designed to recycle most types of waste. Another new project is being set up to discover the best ways of sortin

22、g and separating the rubbish. When this project is complete, the rubbish will be processed like this: first, it will pass through sharp metal spikes which will tear open the plastic bags in which rubbish is usually packed; then it will pass through a powerful fan to separate the lightest elements fr

23、om the heavy solids; after that crushers and rollers will break up everything that can be broken finally, and the rubbish will pass under magnets, which will remove the bits of iron and steel; finely the rubber and plastic will then be sorted out in the final stage. The first full-scale giant recycl

24、ing plants are, perhaps, fifteen years away. But in some big industrial areas, where rubbish has been dumped for so long that there are no holes left to fill up with rubbish, these new automatic recycling plants may be built sooner. Indeed, with the growing cost of transporting rubbish to more dista

25、nt dumps, some big cities will be forced to build their own recycling plants before long. 11. Projects for recycling waste in Britain .A. will not be started for at least fifteen years B. are being developed all over Britain C. have not yet been fully tested D. have been abandoned because they are t

26、oo expensive 12. The purpose of the latest recycling project is A. to prevent people from putting rubbish into holes B. to find a way of destroying all kinds of waste C. to extract useful raw materials from the waste D. to find out how much raw materials should be provided of people want to recycle

27、the waste 13. The new type of recycling plant will . A. recycle only paper and rubberB. not recycle metals, paper or rubber C. recycle paper, rubber and metalsD. not recycle steel, lead or copper 14. The first recycling plants . A. have already been built in large industrial areas B. will not be bui

28、lt for at least fifteen years C. will probably be built in the next fifteen years D. will be too expensive to build near big cities. 15. “Well on with in the first paragraph probably means . A. finished with B. nearing completion C. getting ready to start D. making improvements on Passage 4 People w

29、ith disabilities comprise a large part of the population. It is estimated that over 35 million Americans have physical, mental, or other disabilities. About half of these disabilities are “developmental, i.e., they occur prior to the individuals twenty-second birthday, often from genetic conditions,

30、 and are severe enough to affect three or more areas of development, such as mobility, communication, employment, etc. Most other disabilities are considered “adventitious, i.e., accidental or caused by outside forces. Prior to the 20th century, only a small percentage of people with disabilities su

31、rvived for long. Medical treatment for these disabilities was unavailable. Advancements in medicine and social services have created a climate in which people with disabilities can expect to have such basic needs as food, shelter, and medical treatment. Unfortunately, these basics are often not avai

32、lable. Civil liberties such as the right to vote, marry, get an education, and gain employment have historically been denied on the basis of disability. In recent decades, the disability rights movement has been organized to fight against these infringements of civil rights. Congress responded by passing major legislation recognizing people with disabilities as a protected class under civil rights s