A. fact B. continuously C. ignore D. when E. much F. shows G. prevented

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问题 A. fact B. continuously C. ignore D. when E. much
F. shows G. prevented H. plays I. limited J. unconsciously
K. data L. unpredictable M. tools N. attend O. because
In recent decades, scientists have become increasingly aware of the part the observer 【C1】______ in the scientific process. In the first place, the observer can work only with his experiences, and these are【C2】______ by his senses and the instruments he uses to extend his senses. Ultraviolet light, electromagnetic fields, and atomic particles, for example, became known to us only as we devised【C3】______ with which we could observe their effects. Consequently, our picture of the real world is always incomplete.
Secondly, the observer is highly selective in choosing his【C4】______. Life is a narrative of ever new and often【C5】______ events. At any given moment, an individual is bombarded with sense experiences and can, if he desires, expose himself to more. But he is really interested in or concerned with only a few of these. Other experiences are consciously or【C6】______ screened out as irrelevant to the task at hand. For example, as we read a book, we are often surrounded by sounds and activities that we【C7】______, but by turning our attention to them we become conscious of their presence. What a scientist discovers depends, to a great extent, on what he is looking for— on the questions he is asking. Thus, academic disciplines differ in their study of human beings in large part【C8】______ they ask different questions.
Human beings live, so to speak, in a house with only a few windows of tinted and curved glass, through which we see the outside world. The glass colors and distorts our observations, and its effects can be determined only with【C9】______ difficulty. Scientists are increasingly aware of the 【C10】______ that they work with sense data, not with the world itself. [br] 【C3】

选项

答案 M

解析空格处需要填入名词，作devised的宾语。本句提到的紫外线、电磁场以及原子粒子都是不能通过肉眼观察直接感知到的，only as引导的从句表明了要感知它们的存在就需要借助某些事物或手段，即空格所填内容。词库中符合语义逻辑的名词只有tools“工具”。

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