1、Questions 16-20 are based on the following passage.Very high waves are destructive when they strike the land. Fortunately, this seldom happens. One reason is that out at sea, waves moving in one direction almost always run into waves moving in a different direction. The two sets of waves tend to can
2、cel each other out. Another reason is that water is shallower near the shore. As a wave gets closer to land, the shallow bottom helps reduce its strength.But the power of waves striking the shore can still be very great. During a winter gale, waves sometimes strike the shore with the force of 6,000
3、pounds for each square foot. That means a wave, 25 feet high and 500 feet along its face, may strike the shore with a force of 75 million pounds.(91) Yet the waves, no matter how big or how violent, affect only the surface of the sea. During the most raging storms, the water a hundred fathoms (600 f
4、eet) beneath the surface is just as calm as on a day without a breath of wind.21. According to the passage, destruction caused by high waves occurs .A. regularlyB. rarelyC. alwaysD. predictably22. It is implied that out at sea, when waves going in opposite directions meet, their force .A. cause grea
5、t damageB. extends to the ocean floorC. is liable to lessen D. increases rapidly23. Coastal depth .A. is the only factor influencing the strength of high wavesB. has enormous influence on the force of high wavesC. has on influence pm the strength of very high wavesD. is irrelevant to the power of hi
6、gh waves24. It can be inferred from Para. 2 that the power of high waves striking the shore is .A. constantB. equalizedC. variableD. perpetual25. It is impossible for the high waves .A. to bring about most raging stormsB. to have an effect on the sea bottomC. to affect the surface of the seaD. to ca
7、use damage to the landQuestions 26 to 30 are based on the following passageIf it were only necessary to decide whether teach elementary science to everyone on a mass basis or to find the rifled few and take them as far as they can go, our task would be fairly simple. The public school system, howeve
8、r, has no such choice, for the job must be carried on at the same time. Because we depend so heavily upon science and technology for our progress, we must produce specialists in many fields. (92) Because we live in a democratic nation, whose citizens make policies for the nation, large numbers of us
9、 must be educated to understand, to support, and when necessary, to judge the work of experts. The public school must educate both producers and users of scientific services.In education, there should be a good balance among the branches of knowledge that contribute to effective thinking and wise ju
10、dgment. Such balance is defeated by too much emphasis on any one field. The question of balance involves not only the relation of the natural sciences, the social sciences, and the arts but also relative emphases among the natural sciences themselves.Similarly, we must have a balance between current
11、 and classical knowledge. The attention of the public is continually drawn to new possibilities in scientific fields and the discovery of new knowledge; these should not be allowed to turn our attention away from the sound, established materials that form the basis of courses for beginners.26. It is
12、 indicated in Para. 1 that the task of education is fairly complicated because .A. the current public school system is too complicated to be understoodB. the public school system has no choice of what to teachC. it is difficult to decide whether elementary science should be taught in public schoolD.
13、 the educators have to take care of both ordinary and gifted students27. The word“defeated”(Para. 2) most probably means .A. brokenB. beatenC. lostD. smashed28. Which of the following statements is NOT included in the passage?A. One of the major tasks of education is to discover the most promising s
14、tudents.B. In order to teach effectively, educators are requested to lay emphasis on one particular field.C. Some subjects have been over-emphasized in public schools.D. The progress of the society cannot merely rely on inventors.29. It can be inferred from the passage that .A. students should learn more up-to-date knowledgeB. lack of scientific knowledge will lead to poor relations between producers and users of scientific servicesC. students are getting to know the importance of good balance among the branches of knowledgeD. sufficient attention should be given to basi
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