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參考答案：
l. A 2. C 3. D 4. B 5. D
6. C 7. D 8. B 9. A 1O. C
21. D 22. B 23. D 24. C 25. A
26. B 27. D 28. B 29. A 30. C
31. D 32. A 33. 34. DC 35.C
36. B37. D 38. B 39. A 40. D
41. C 42. D 43. A 44. B 45. C
46. A 47. D 48. B 49. C 50. A
51. B 52. A 53. D 54. A 55. B
56. C 57. C 58. D 59. C 60. A
61. C 62. D 63. D 64. A 65. B
66. A 67. D 68. B 69. B 70. A
71.在這些原因中，有些完全是自然而然地來自社會需求；另一些則是由於科學在一定程度上自我加速而產生某些特定發展的必然結果。
72.這種趨勢始於第二次世界大戰期間，當時一些國家的政府得出結論：政府要向科研機構提出的具體要求通常是無法詳盡預見的。
73.給某些與當前目標無關但將來可能產生影響的科研以支持，看來通常能有效地解決這個問題。
74.然而，世界就是如此，完美的體系一般而言是無法解決世上某些更加引人人勝的課題的。
75.同過去—樣，將來必然會出現新的思維方式和新的思維對象，給完美以新的標準。
Part V . Writing
GOOD HEALTH . . .
Wherever you are and whatever you do, staying healthy is always important. With the improvement of our living standards, people are attaching more and more importance to their health. We students can' t keep the high study efficiency without good. health. The same thing is true with workers, scientists and doctors. In my opinion, good diet and exercises are two major ways to keep healthy. The food we eat every day must be rational and should include meat, vegetables, eggs, and fruit. It is important to drink water every day and not to get addicted to drinking coffee or some other soft drinks. Ex-ercising every day is also essential for us to stay healthy. We can ride bicycles, play tennis or swim. Of course we don' t need to exhaust ourselves. We should plan our physical exercises according to our actual condition. An hour a day is enough. As a university student, I have much free time to do exercises. l usually play badminton and tennis. But sometimes I am lazy and do not exercise for all kinds of excuses, such as cold weather and exams. I must correct it. I am also careful with my diet. In a way, keeping healthy is not very hard, if you just take it seriously.
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