单选:()防护自动闭塞区段的闭塞分区和非自动闭塞区段的所有区间。A.进路信号机B.进站信号机C.出站信号机D.通过信号机

题目内容:
()防护自动闭塞区段的闭塞分区和非自动闭塞区段的所有区间。
A.进路信号机
B.进站信号机
C.出站信号机
D.通过信号机
参考答案:

CTCS-2级区段,()产生运行许可并连续向列车传送。A.轨道电路B.有源应答器C.无源应答器D.LEU

CTCS-2级区段,()产生运行许可并连续向列车传送。A.轨道电路B.有源应答器C.无源应答器D.LEU

查看答案

—They have learned about ______ in recent years.A. several hundreds English word

—They have learned about ______ in recent years.A. several hundreds English word

查看答案

—These desks and chairs ______to the children in the mountain villages next w...

—These desks and chairs ______to the children in the mountain villages next w...

查看答案

—The young seedlings remained alive ______the protecting snow.A. under B. below

—The young seedlings remained alive ______the protecting snow.A. under B. below

查看答案

美国的F—80飞机是活塞式战斗机。A.正确B.错误

美国的F—80飞机是活塞式战斗机。A.正确B.错误

查看答案