A-A+
Genetic engineering may be defined as________．
问题详情
Genetic engineering may be defined as________．
A.the altering of normal cell reproduction
B.a branch of applied chemistry
C.a procedure that holds little promise
D.a study on life-saving enzymes请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
题意：基因工程应该被定义为……。关于基因工程(geneticengineering)的定义，与点明全文主旨的相关句是同一个句子：Anunder-standingofDNAledtothealteringofnormalcellreproduction所以基因工程的中心就是改变正常的人体细胞繁殖(thealteringofnormalcellreproduction)。所以本题选A。
