铁路行车基本闭塞法有自动闭塞和()两种。A:半自动闭塞B:电气联锁C:路签闭塞D:手动闭塞

作者: rantiku 人气: - 评论: 0

问题铁路行车基本闭塞法有自动闭塞和()两种。

选项 A:半自动闭塞 B:电气联锁 C:路签闭塞 D:手动闭塞

答案 A

解析

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