单选题:题共用以下备选答案。A.微核试验B.显性致死试验C.细菌回复突变试验 D.骨髓染色体畸变试验E.程序外DNA合成试验检测

题目内容:
题共用以下备选答案。
A.微核试验
B.显性致死试验
C.细菌回复突变试验 
D.骨髓染色体畸变试验
E.程序外DNA合成试验
检测化学毒物的基因突变作用选用
参考答案:
答案解析:

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教育心理学家建议那些受孩子们“我觉得无聊”之类的话所累的父母,“无聊”远非某种不可挽回的判决,反而具有很多积极方面。它能激起孩子的创造力,帮助孩子观察、反思、理

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