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问题 选择题

The salesman scolded the girl caught ____ and let her off．

A．to have stolen

B．stealing　

C．to steal 　

D．to be stealing

答案

答案：B

题目分析：句意是：销售员责备了被抓住偷东西的女孩，让她走了。这里过去分词caught是定语修饰the girl，而“抓住某人正在做什么”是：catch sb doing，用现在分词做宾语补足语，选B。

单项选择题

闭环控制系统的反馈装置______。

A、装在电机轴上；

B、装在位移传感器上；

C、装在传动丝杠上；

D、装在机床移动部件上。
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单项选择题

There is a difference between science and technology. Science is a method of answering (1) questions; technology is a method of solving practical problems. Science has to do with discovering the facts and relationships between (2) phenomena in nature and with establishing theories that (3) to organize these facts and relationships; technology has to do with tools, techniques, and (3) for applying the findings of science. Another (5) between science and technology has to do with the progress in each.

Progress in science (6) the human factor. Scientists, who seek to understand the universe and know the truth within the highest degree of (7) and certainty, cannot (8) their own or other people’s likes or dislikes or to popular ideas about the fitness of things. What scientists discover may shock or (9) people-as did Darwin’s theory of evolution. But even an unpleasant truth is (10) than likely to be useful; besides, we have the choice of refusing to believe it! But (11) so with technology; we do not have the choice of refusing to hear the sound produced by a supersonic aircraft flying overhead; we cannot refuse to breathe polluted air. (12) science, progress in technology must be measured (13) the human factor. The purpose of technology is to serve people—people (14) , not merely some people; and future generations, not merely those who presently wish to (15) advantage for themselves.

We are all familiar with the (16) use of technology. Many people blame technology itself (17) widespread pollution, resource depletion (枯竭) and even social decay in general—so much (18) the promise of technology is " (19) " That promise is a cleaner and healthier world. If wise applications of science and technology do not (20) a better world, what else will

13（）

A. in terms of

B. by means of

C. by virtue of

D. as a result of
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