题目

 Most people would agree that nuclear science should be developed to benefit the human beings_______ harm them.     A. more than           B. other than        C. better than      D. rather than 答案:D 解析:     3.如图所示几种性染色体异常果蝇的性别,育性,下列相关叙述中,错误的是(  )A.正常果蝇在减数分裂过程中染色体组数目最多可达四个B.部分含有奇数条性染色体的个体既能正常生活又可育C.四个图中所示的变异都为染色体数目变异D.性染色体为XXY的个体产生的原因可能是卵细胞异常
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