【正文】 ight are constantly being tested. 26. The two main requirements of aircraft design are ______. A) speed and cheapness B) reliability and passenger fort C) making things both light and dependable D) ability to stay up in the air and avoid breakdowns 正確答案是 27. The stress man39。t digest the huskless rice B) proved beriberi is transmitted by germs C) were later cooked for the patients39。re going to flunk anyway, why not cheat. Cheating is most likely in situations where the vital interests are high and the chances of getting caught are low, says social psychologist Lynn Kahle of the University of Oregon in Eugene. 1. The passage centers on ______. A) convincing the reader that cheating is immoral B) discussing the reasons for cheating C) describing how students cheat in exams D) suggesting how to control cheating 正確答案是 2. Cheating tends to occur in all the following situations except when ______. A) one wants something badly B) one can39。re willing to run the risk of being caught. That39。ll do it regardless of any guilt or deep regret, and you39。s nothing. If you39。 ______. A) kills a large number of western people B) is a vitamin deficiency disease C) is transmitted by diseased rice D) can be caught from diseased chickens 正確答案是 19. The chickens Eijkman noticed in the hospital yard ______. A) couldn39。the proportion of testtube girls to boys is high. B) Heart defect usually occurs in only 15 out of 60,000 in Australia. C) Heart defect shows up in one out of nine testtube babies. D) The testtube babies are growing well. 正確答案是 25. Where did the passage most probably appear? A) In a specialized publication for moral philosophers. B) In a specialized report for doctors. C) In a weekly news magazine with a large readership. D) On the front page of a daily newspaper. 正確答案是 Passage 6 There are two main things that make aircraft engineering difficult: the need to make every ponent as reliable as possible and the need to build everything as light as possible. The fact that an aeroplane is up in the air and cannot stop if anything goes wrong, makes it perhaps a matter of life or death that its performance is absolutely dependable. Given a certain power of engine, and consequently a certain fuel consumption, there is a practical limit to the total weight of aircraft that can be made to fly. Out of that weight as much as possible is wanted for fuel, radio navigational instruments, passenger seats, or freight room, and, of course, the passengers or freight themselves. So the structure of the aircraft has to be as small and light as safety and efficiency will allow. The designer must calculate the normal load that each part will bear. This specialist is called the stress man. He takes account of any unusual stress that may be put on the part as a precaution against errors in manufacture, accidental damage, etc. The stress man39。s future energy needs. At present the EEC spends about 39。s needs before the year 20xx. D) 3% of the EEC39。s free time D) to fight with neighbor39。 structure and the people who lived in them C) castles39。s needs after the year 20xx B) only 3% of the EEC39。s scientific laboratories at Ispra, near Milan. The senior West German scientist in charge of the Community39。s like to carry, a test tube baby. Are these pregnancies normal Are the babies normal The earliest answers came from Australia, where a group of medical experts at the Queen Victoria Medical Center in Melbourne took a look at the continent39。vitamins39。re seeing more of the kind of person who regards the world as a series of things to be dealt with. Whether to cheat depends on whether it39。大學(xué)英語(yǔ)四級(jí)考試練習(xí) 作者：佚名 CET4 Exercise 30 Reading Comprehension amp。s in the person39。. Quite a number of such substances are known and they are given letters to identify them, A, B, C, D, and so on. Different diseases are associated with deficiencies of particular vitamins. The vitamins necessary for a healthy body are normally supplied by a good mixed diet, including a variety of fruit and green vegetables. It is only when people try to live on a very restricted diet, say during extended periods of religious fasting, or when trying to lose weight, that it is necessary to make special provision to supply the missing vitamins. One example of the dangers of a restricted diet may be seen in the disease known as beriberi, which used to afflict large numbers of Eastern peoples who lived mainly on rice. In the early years of this century, a Dutch scientist called Eijkman was trying to discover the cause of beriberi. At first he thought it was transmitted by a germ. He was working in a Japanese hospital, where the patients were fed on rice which had had the outer husk removed from the grain. It was thought this would be easier for weak, sick people to digest. Eijkman thought his germ theory was confirmed when he noticed, the chickens in the hospital yard, which were fed on scraps from the patients39。s first nine successful testtube pregnancies. The Australians report that the pregnancies themselves seemed to proceed according to the plan, but at birth some unusual trends did show up. Seven of the nine babies turned out to be girls. Six of the nine were delivered by Caesarean section. And one baby, a twin, was born with a serious heart defect and a few days later developed lifethreatening abdominal problems. What does it all mean Even the doctors don39。s solar energy program, Mr. Joachim Gretz, told journalists that at present levels of research spending it was most unlikely that solar energy would provide as much as three per cent of the Community39。s needs before the year 20xx C) lees than 3% of the EEC39。 structure and the life in them D) castles39。s alarm clock because he crows every morning. This is how everyone on a farm wakes up. Only hens, fullgrown female chickens, can lay