PLC布尔助记符OR NOT对应的梯形图符号是()。 A. B. C. D. 发布时间:2018-10-28 07:28 │ 来源:www.tikuol.com 题型:单项选择题 问题: PLC布尔助记符OR NOT对应的梯形图符号是()。A.B.C.D.
题型:单项选择题 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