_____to nuclear radiation, even for a short time , may produce variants(变异体) of genes in human bodies.
A.Being exposed | B.Having expose |
C.Exposed | D.After being exposed |
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_____to nuclear radiation, even for a short time , may produce variants(变异体) of genes in human bodies.
A.Being exposed | B.Having expose |
C.Exposed | D.After being exposed |