My mother likes _____ TV, but she doesn't like _____ it now. [ ]

A. to watch; watching

B. watching; to watch

C. to watch; to watch

关于开关失灵保护描述正确的是（）

A.失灵保护的整定时间应大于线路主保护的时间

B.失灵保护动作后，应检查母差保护范围，以发现故障点

C.失灵保护动作将启动母差保护

D.若线路保护拒动，失灵保护将无法启动