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单选题
FU指令选项“GATE”解释为()
A
登机口
B
到达时间
C
布局表号
D
取消修改
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若定时器T1受外部输入引脚电平(高电平起作用)的影响,则要启动定时器T1运行软件,必须满足()A、GATE=0,TR1=0B、GATE=0,TR1=1C、GATE=1,TR1=0D、GATE=1,TR1=1
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单选题Unlike the globe valve, gate valves give full bore flow without change of direction, such a valve is not suitable to partially open operationAccording to the above sentence, which of the following statements is not true?()A
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单选题以下选项中哪个选项不是常用制动的施加方式?()A
由司控器施加B
ATO制动指令C
ATP制动指令D
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