人们所说的”泵”是指()
A.载体
B.膜脂
C.主动运输的载体
D.膜上的受体
参考答案:C
–You used to live in the city, ____ you?
–Yes, but so far I’ve already get used to ____ in the countryside.
A.didn’t; live
B.didn’t; living
C.did; live
D.did; living
内啮合齿轮泵或转子泵的轮齿()是吸油区,()是压油区。