A.She is a trade union representative.B.She is in charge of public relations.C.She is a
A. She is a trade union representative.
B. She is in charge of public relations.
C. She is a senior manager of the shop.
D. She is better at handling such matters.
查看答案
下列PLC系列中不属于单元式结构的是()
A. 西门子S7-200系列
B. 三菱F1.F2系列
C. 欧姆龙CPM1A.CPM2A系列
D. 西门子S7-400系列
34×7的轮胎外径为()英寸。
A. 17
B. 24
C. 34
D. 7
为了有明显区别,并列安装的同型号开关应不同高度,答案:B落有致。
要使绝缘栅双极晶体管导通,应()。
A. 在栅极加正电压
B. 在集电极加正电
C. 在栅极加负电压
D. 在集电极加负电压