【正文】 danger of nuclear power lies in _________. A) nuclear mystery B) radiation detection C) radiation level D) nuclear radiation 37. Radiation can cause serious consequences even at the lowest level _________. A) when it kills few cells B) if it damages few cells C) though the damaged cells can repair themselves D) unless the damaged cells can reproduce themselves 38. The word “significant” in paragraph 3 most probably means _________. A) remarkable B) meaningful C) fatal D) harmful 39. Radiation can hurt us in the way that it can _________. A) kill large numbers of cells in main ans so as to cause death immediately. B) damage cells which nay grow into cancer years later C) affect the healthy growth of our offspring D) All of the above. 40. Which of the following can be best inferred from the passage? A) The importance of protection from radiation cannot be overemphasized. B) The mystery about radiation remains unsolved. C) Cancer is mainly caused by radiation. D) Radiation can hurt those who are not aware of its danger. 5 Passage Two In some ways, the United States has made spectacular progress. Fires no longer destroy 18,000 buildings as they did in the Great Chicago Fire of 1871, or kill half a town of 2,400 people, as they did the same night in Peshtigo, Wisconsin. Other than the Beverly Hill Supper Club fire in Kentucky, in 1977, it has been four decades since more than 100 Americans died in a fire. But even with such successes, the United States still has one of the worst fire death rates in the world. Safety experts say the problem is neither money nor technology, but the indifference of a country that just will not take Fires seriously enough. American fire departments are some of the world39。s one example: plants and animals adapt to climate change over centuries. At the current estimate of half a degree centigrade of warming per decade, vegetation(植物 ) may not keep up. Climatologist James Hansen predicts climate zones will shift toward the poles by 50 to 75kilometres a yearfaster than trees can naturally migrate. Species that find themselves in an unfamiliar environment will die. The 1000kilometrewide strip of forest running through Canada, the USSR and Scandinavia could be cut by half. Millions of dying trees would soon lead to massive forest fires, releasing ions of CO2 and further boosting 7 global warming. There arc dozens of other possible. feedback mechanisms39。s surroundings and to the relationship between self and that environment. The mental map is best generated by moving through the environment and piecing together relationships, object by object, in an anized approach. With little or no visual feedback to reinforce this mental map, a visually impaired person must rely on memory for key landmarks and other clues. Landmarks and clues enable visually impaired persons to affirm their position in Space. Mobility, on the other hand, is the ability to travel safely and efficiently from one point to another within one39。re least effective when most needed. “You take your pill at 7and it39。t understand directions, for we made a wrong turn and found us lost, A B C confused as to which way we should go. D 2. It is indeed hard to overestimate the value of language in munication, but A B it is even hard to overestimate its value in thinking. C D 3. (Written English) has bee more (importantly) in (business English),(with) the A B C D invention of the fax and the puter. 4. When a post office handles (large quantities) of mail daily, it is essential that A mechanical methods (are used)(to maintain) production and insure (prompt) delivery B C D of the mails. 5. Vincent Van Gogh killed (himself) when he was only 37, but he (left behind) him A B more than 2022 paintings and drawings, (that) established his reputation in a way C he (would never have considered) possible 16 D 6. Perhaps (surprisingly) the (main) obstacles to (realiz。t been able to do anything about it. Most blood pressure drugs provide 18 to 20 hours of relief. But because they39。s Hospital Medical Center in Boston. Doctor Duffy found large differences in the brain activity of normal children and those with reading problems. The differences appeared throughout the brain. Doctor Duffy said his research is evidence that reading disabilities involve damage to a wide area of the brain, not just the left side. 51. Scientists found that the brain cells of a learningdisabled person differ from those of a normal person in ________. A) structure and function B) color and function C) size and arrangement D) color and arrangement . 52. Which of the following is NOT mentioned in the passage? A) Learning disabilities may result from the unknown area of the brain. B) Learning disabilities may result from damage to a wide area of the brain. C) Learning disabilities may result from abnormal anization of brain cells. D) Learning disabilities may result from problems in the left side of the brain. 53. All of the following statements are true EXCEPT that ________. A) many factors account for learning disorder B) a learning disabled person shows no outward signs C) reading disabilities are a mon problem that affects 10 percent of the population D) the brain activity of learning disabled children is different from that of normal children 54. Doctor Duffy believed that ________. A) he found the exact cause of learning disabilities B) the problem of learning disabilities was not limited to the left side of the brain C) the problem of learning disabilities resulted from the left side of the brain D) the problem of learning disabilities did not lie in the left side of the brain 55. According to the passage we can conclude that further researches should be