题目内容

运行值班人员应认真执行调度员的操作命令。

A. 对
B. 错

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电气运行定义?

The track equipment includes:steel track, ____________, a sleeper,____________,____________,and connecting parts.

For the power supply system, ____________ has been adopted as the mode of providing direct current for the contact rail(the third rail).

The ________ and the ________ are the foundation (基础)ofthe steel track.

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