_____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in bodies.
A.Being exposed |
B.Having exposed |
C.Exposed |
D.After being exposed |
推荐套卷
_____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in bodies.
A.Being exposed |
B.Having exposed |
C.Exposed |
D.After being exposed |