【单选题】【消耗次数：1】
OUT指令对于（）是不能使用的。
①
状态继电器
②
输入继电器
③
辅助继电器?
④
输出继电器
参考答案：
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相关题目
【单选题】
下列对PLC输入继电器的描述正确的是（）
①
输入继电器的线圈只能由外部信号来驱动
②
输入继电器的线圈只能由程序来驱动
③
输入继电器的线圈既可以由外部信号来驱动又可以由程序来驱动
④
输入继电器不能按位寻址
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fare
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22. One day while Mr. King was working, he had a/an ____: his left leg was badly injured.
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there was no need for us to hurry
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Do you like this kind of dishes?
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You are welcome to our restaurant. Take seat, please.
③
Would you like to see a menu?
④
Everybody! Order, please!