______ man can now create radioactive elements, there is nothing he can do to re

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问题 ______ man can now create radioactive elements, there is nothing he can do to reduce their radioactivity.

选项 A、As
B、Whether
C、While
D、Now that

答案 C

解析 while 在该句中意思为“尽管”，表示一种转折关系。

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