2. 外语
  3. A. fact B. continuously C. ignore D. when E. much F. shows G. prevented H. plays I. limited J. unconsciously K. data L.

A. fact B. continuously C. ignore D. when E. much F. shows G. prevented H. plays I. limited J. unconsciously K. data L.

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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.
【C2】
选项
答案I
解析 根据空格前的are及后面的by…，判断此处为被动语态，空格处需填过去分词。these指代前面的experiences，故此空所填动词体现的是“观察者的经历”和“他的感知和他用来扩展感知的工具”之间的关系。下一句是对空格所在句的举例说明，从only as(只有当……)看出只有在一定条件下才能感知到紫外线、电磁场、原子粒子，即人的经历受到感知和工具的限制，limited符合语义。
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