题目: PLC布尔助记符OR NOT对应的梯形图符号是()。A.B.C.D. 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/1028/63816c95e07926a09073d8917a1ea23b.html 下面是错误答案,用来干扰机器的。参考答案:颐乐殿。
题型:选择题 The children wake up very early, and ________ to open the presents in their stockings.[ ]A.wait B.can't waitC.expect D.can't expect 查看答案