性能优良的锚应具有:()
①、较大的抓力系数;②、抛起迅速;③、结构坚固;④、重量较大
A.①、②、④
B.①、②、③
C.②、③、④
D.①、②、③、④
参考答案:B
—Does your son like carrots?
— ______ . [ ]
A. Yes, she does
B. No, she doesn't
C. No, he doesn't
精子受精前的准备。