题目

They will buy less if they find they are cheated, and your supermarket will get a bad ________. A . reputation B . identity C . fortune D . nickname 答案：A双链DNA分子中胸腺嘧啶的数量为M，占总碱基数的比例为q，若此DNA分子连续复制n次需要的鸟嘌呤脱氧核苷酸为 （ ）A．（2n－1）M B．M（1/2q－1） C．（2n－1）M（1－2q）/2q D．（2n－1）M/2nq