题目

胚胎移植能否成功，与供体和受体的生理状况有关，首先应对供体和受体动物进行同期发情处理。最常用的方法是（     ） A、假阴道法         B、激素处理        C、电刺激           D、克隆 答案：B---The girl hardly holds on to her dream, _______?---_______. I’m sure her dream will come true soon.A. doesn’t she; No, she doesn’t B. isn’t she; Yes, she isC. does she; Yes, she does D. does she; No, she doesn’t