Radiation can cause serious consequences even at
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Radiation can cause serious consequences even at the lowest level______.
A.when it kills few cells
B.if it damages few cells
C.though the damaged cells can repair themselves
D.unless the damaged cells can reproduce themselves
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答案:B
由文章第三段内容可知,即使是在辐射强度最低的情况下,一些细胞被破坏,也会造成严重的影响,因为这些细胞可能会再生,发展为畸形,并最终生成癌细胞,对人体造成危害。故选B。
