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【单选题】
列车临时停车时要将主控手柄拉到全常用制动位，列车停车超过 （ ）时，司机需将方向手柄置零位。如发生溜车时应按压停放制动施加按钮
A.
10分钟
B.
20分钟
C.
30分钟
D.
1小时
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】After the birth of my second child，I got a job at a restaurant.Having worked with an experienced 16for a few days，I was 17to wait tables on my own.All went 18that first week.When Saturday night came，I...
A.
repeated
B.
discovered
C.
corrected
D.
described