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to nuclear radiation, even for a short time, may produce variants of genes on hu

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to nuclear radiation, even for a short time, may produce variants of genes on hu

 ____________ to nuclear radiation, even for a short time, may produce variants(变体) of genes on human bodies.
A. Being exposed  B. Having exposed        C. Exposed                     D. After being exposed

试题答案

A

标签：timeshortmayvariantsproduce

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