[简答题]The train control system, based on parameters concerning trains and railway line, train operation schedule and the status of routes, controls train direction, headway and train speed through train speed measurement and train positioning. It can guarantee train safety and increase carrying capacity of the line.

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[单选题]An amber half frame appears when oxygen pressure is：
A. less than 1000 PSI
B. less than 600 PSI
C. lower than minimum release standard

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[多选题]Which of the following is/are half cardinal points? ( )
A. northeast
B. east north
C. east
D. northwest

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[单选题]The indication is half-boxed in amber, if:
A. Center tank pumps fail, or are switched OFF
B. Both transfer valves fail to open, when the inner tank is at low level
C. All of above

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[单选题]在本文中,“train antenna”的意思是( )。
A. 牵引电网
B. 车载天线
C. 行车电信号
D. 车辆受电弓

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[判断题]The last train arrives at half past eleven at night. 的中文翻译为：末班车晚上11点半到站。A.正确B.错误

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[判断题]The last train arrives at half past eleven at night. 的中文翻译为：末班车晚上11点半到站。
A.正确
B.错误