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  3. There is a difference between science and technology. Science is a method of answering theoretical (31); technology is a method

There is a difference between science and technology. Science is a method of answering theoretical (31); technology is a method

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问题     There is a difference between science and technology. Science is a method of answering theoretical (31); technology is a method of (32) practical problems (and sometimes creating new problems out of the "solutions"). Science has to do with discovering the facts and relationships (33) observable phenomena in nature and with establishing theories that serve to organize (34) facts and relationships; technology has to do (35) tools, techniques, and procedures for implementing the findings of science. Another distinction between science (36) technology has to do with the progress in each.
    Progress (37) science excludes the human factor. And this is justly so. Scientists, (38) seek to comprehend the universe and know the truth within the highest degree of accuracy and certainty cannot pay attention to their own or other people’s likes or (39) or to popular ideas about the fitness of things. What scientists discover may shock or anger people—as (40) Darwin’s theory of evolution. But even an unpleasant truth is more than likely to be useful; besides, we have the option of refusing to (41) it! But hardly so with technology; we do not have the option of refusing to (42) the sonic boom produced by a supersonic aircraft (43) overhead; we do not have the option of refusing to breathe polluted (44); and we do not have the option of living in a non-atomic age. Unlike science, progress in (45) must be measured in (46) of the human factor. Technology must be our slave and not the reverse. The legitimate purpose of technology is to serve people—people in (47), not merely some peoples and future generations, not merely (48) who presently wish to gain advantage (49) themselves. Technology must be humanistic (50) it is to lead to a better world.

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答案those
解析 考查代词。由空格后从句连接词who可以看出，此处应填入一个表人的先行词。而由句意可知，这里应指"那些…的人"，所以填入表远指的代词复数those。
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