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. part.


解析:

take part in參加。

本題譯文：顯然，整個世界正經(jīng)歷著一場社會革命；科學家和技術(shù)人員必定是這場革命地主要參加者。

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