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______ to nuclear radiation, even for a ...

______ to nuclear radiation, even for a short time, may influence genes in human bodies.

A.Exposed

B.Being exposed

C.To expose

D.Having exposed

 

B 【解析】 试题分析:考查动名词做主语,分析句子成分发现even for a short time, 是插入语,may influence是谓语,前面的部分应该是主语,be exposed to“暴露于”,要用动名词Being exposed to,句意是:暴露于核辐射中甚至很短时间都会影响人体的基因。选B。 考点:考查动名词做主语
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