()应设在闭塞分区或所间区间的分界处。
A、进站信号机
B、出站信号机
C、通过信号机
D、进路信号机
参考答案:C
He says men are more able than women and this is _____ I am really not for.
A.which
B.where
C.what
D.why
石油入海后要经过什么自然过程而消除污染的?