GATE指什么()A、进闸机B、出闸机C、边门D、双向闸机
GATE指什么()
- A、进闸机
- B、出闸机
- C、边门
- D、双向闸机
相关考题:
要使8254通道2工作于方式3输出非对称的周期性方波,必须有()。A、GATE为高电平,计数初值为奇数B、计数初值为偶数,GATE为高电平C、GATE为低电平,计数初值为奇数D、计数初值为偶数,GATE为低电平
要使8254通道2工作于方式4输出对称的周期性方波,必须有()。A、GATE为高电平,计数初值为奇数B、计数初值为偶数,GATE为高电平C、GATE为低电平,计数初值为奇数D、计数初值为偶数,GATE为低电平
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
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?()AThe globe valve may be suitable for partially open operationBThe globe valve will give full bore flow with change of directionCThe gate valve gives full bore flow with change of directionDThe gate valve is suitable for full bore operation only
填空题8253—5作于方式2时,当门控信号GATE为()时,计数进行;当门控信号GATE为()时,计数停止。