发酵生产各类产品时，必须设法满足所利用的微生物生长和繁殖所需的各种条件。[ ]
√
—It is said that Mike fought with Tom in class.
—It ______ be him. It is not ______ him to have done it like that. [ ]
A. can't; like
B. may not; as
C. can't; as
D. mustn't; like
（）不属于继电保护的基本要求。
A.选择性
B.迅速性
C.跳跃性
D.灵敏性
