【正文】 As a result, these areas send out less heat and light and thus appear from Earth to be almost dark irregular surface patches. Sun spot activity generally fluctuates in steady, 11year cycles. Scientists have long formed the opinion that as the size and number of sun spots increased, the overall energy sent out by the sun would decrease. Indeed, recent studies confirmed it, revealing that during peak periods of sun spot activity, the Earth experiences a small drop that can be seen clearly in received solar energy. Could such a small drop in energy have an effect here on Earth? Perhaps. Some scientists think the world temperature could fall by as much as ℃ during periods of high solar magism enough to cause significant fluctuations in weather patterns. 1. According to the passage, it is believed that the sun ______.【 直接法 】 [A] moves in a quick but steady way year after year [B] sends out less and less heat and light with each passing year [C] radiates the same amount of light every year [D] might have a strong influence on the weather patterns 2. Which of the following is NOT true of the sun spots? 【 直接法 】 + 【 排除法 】 [A] They are caused by the magic pull from inside the sun. [B] They are areas of highlevel magism. [C] They are actually black holes in the sun. [D] They reach their peak in a cycle of 11 years. 3. It can be inferred that Livingston ______. 【 直接法 】 + 【 排除法 】 [A] thinks he has discovered a new possibility in the link between the sun spots and the weather on the Earth [B] has great doubts about the theory that the sun39。 bombs are placed and exploded from time to time to set off small avalanches before a big one has time to build up。 of the heart, liver and lung, after 10 to 30 minutes。s inconstancy is magism. Professor William Livingston has developed new theories about its magic nature. ―We don39。 s first man of letters He was， in fact， one of the most successful writers of his time in either country， delighting a large general public and at the same time winning the admiration of fellow writers like Scott in Britain and Poe and Tarwthorne in the United States. 2. What is implied by the ment about Scott, Poe and Hawthorne? A) More Americans than Britons admired Irving. B) Irving39。 signals to us f。s success. D) Irving enjoyed great popular admiration. The respect in which he was held was partly owing to the man himself， with his warm friendliness， his good sense， his politeness， his gay spirits， his artistic integrity， his love of both the old World and the New. Thackery described Irving as a gentleman， who， though himself born in no very high sphere， was most finished， polished， witty。re areas of highlevel magism that e up from the sun39。 and of the skin, after 6 to 12 hours. A) kidney is one of the most delicate B) brain is more delicate D) many people are w Although the shorter the time the an is deprived of its blood supply the better, the cornea(角膜 )can be removed for grafting(移植 )at relative leisure, but …. 34. Which of the following ans can survive the longest? A) Livers B) Lungs C) Hearts … .For a kidney to be preserved from 48 to 72 hours, a plicated machine is required to provide artificial circulation. To keep a kidney undamaged for longer than 72 hours is difficult. Blood cells, spermatozoa(精子 )and certain other dissociated tissue cells can be frozen to subzero temperatures and kept alive indefinitely. 35. A) can help preserve kidneys without d Special preserving fluids will prevent cell destruction by icecrystals, but these fluids have damaging effects if introduced into whole ans 33. B) A dead kidney can be made to live after blood is reinfused into its blood ve 7 P320P4（雪崩） Death es quickly in the mountains. Each winter holidaymakers are caught unconscious as they happily ski away from the fixed runs, little realizing that a small avalanche can send them crashing in a bonebreaking fall down the slope and leave them buried under tons of crisp white snow. … .. 51. Each winter holiday makers in the mountains e face to face with death because ___ . A. they fail to realize how dangerous avalanches can be B. they are not expert enough at skiing on the fixed runs C. they are trying to avoid areas where avalanches happen D. they ski great distances down the mountainsides The snow in the Salzburg of Austria, where a recent disaster took place, was typical avalanche material. … 52. According to the writer, skiing conditions in the Salzburg area of Austria before the accident happened were ___. A. perfect for the inexperienced skier B. unsafe because the new snow was covered with ice C. typical of conditions resulting in avalanches D. suitable only for skiing locally …. Problems e when any particular section is too thick and not sticking to the section beneath. …. The result of these conditions is that even a slight increase in the temperatures sends a thin stream of water between the new snow and the old. Then the new snow simply slides off the mountain. 53. It would appear from the passage that avalanches are brought about because ___ . A. a particular section of snow is not thick enough B. there is a slight fall in the temperature C. heavy snowfalls turn into rain D. the ice between different sections of snow melts Such slides are not unexpected. Local citizens know the slopes which tend to avalanche and the weather in which such slides are likely. Traps are set to catch the snow or prevent it slipping。 of the kidney(腎 )， after 50 to 100 minutes。t yet know what causes sun spots,‖ he says, ―but we now think they39。 s work was not only popular, but also of high literary quality. C) Scott, Poe, and Hawthorne were primarily responsible for Irving3