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     It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.

    A. process   B. attention    C. measure    D. part

    D


    解析:

    take part in参加。

    本题译文：显然，整个世界正经历着一场社会革命；科学家和技术人员必定是这场革命地主要参加者。

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