【判断题】PLC基本指令ANB称为“电路块或指令”,其功能是使电路块与电路块并联。()
【判断题】O和ON是用于将单个触点与上面的触点(或电路块)串联连接的指令。
【单选题】在高温和发热中强烈脱水,从而质变干硬,并可生霉和遭受虫蛀的中药是
【简答题】ANB指令是(),ORB是电路块或指令,与and、or指令不同
【单选题】— Must I go to the shop with you, Mum? — Err...I can make it myself, Mike. You go with me. [ ]
【单选题】I can't go shopping with you. I must______ the lessons first.