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当前学科:高级车站值班员考试
题目:
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调车手信号的显示,昼间展开的绿色信号旗在下部左右摇动,其含义为()。
A . A、发车指示信号
B . B、列车互检通告信号
C . C、指挥机车向显示人方向来的信号
D . D、指挥机车向显示人反方向去的信号
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