問題詳情

Exposure to ultraviolet light, chemicals from the ______ or even the byproducts of normal metabolism may damage one of the genes in a cell.
(A)environment
(B)government
(C)sentiment
(D)movement

參考答案

答案:A
難度:簡單0.84047
統計:A(1001),B(68),C(96),D(26),E(0)

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