通过信号机一般设于区间闭塞的入口处或线路所所在地。
参考答案：对
"Mr. Smith is ill in hospital." "_____." [ ]
A. I'm sorry to hear that
B. Yes, he has to see the doctor
C. Don't worry about it
D. I'm glad to hear that
证券由卖方向买方转移和对应的资金由买方向卖方转移的过程属于( )。
A．交收
B．清算
C．成交
D．结算
