(单选题)4: 有关自锁和互锁说法错误的是()。 A: 自锁利用动合辅助触点 B: 互锁利用动断辅助触点 C: 自锁能保证两个交流接触器的线圈不会在同一时间内都处于导通状态 D: 互锁环节与另一交流接触器的线圈串联 ...
(判断题)18: 单线触电比两线触电更危险。 A: 对 B: 错 ...
(判断题)12: 电路简单地说就是电流流通的路径。 A: 对 B: 错 ...
(单选题)6: 交流电变化一个循环所需要的时间称为()。 A: 周期 B: 频率 C: 相位 D: 瞬时值 ...
(判断题)30: Much as we would like to close the business with you, we find your bid unacceptable. A: 对 B: 错 ...
(判断题)24: Zhao is taking an interview in the meeting room on the third floor. A: 对 B: 错 ...
(单选题)18: She asked them to report to the sales manager, ______ office is on the first floor. A: which B: whose C: who D: that ...
(单选题)12: Go along this street ______ a few minutes and then ______ the next turning. A: in…take B: for…taking C: for… take D: at…takes ...
(单选题)6: We are having a party ______ our home ______ Saturday, ______ 6 p.m.. A: on…at…on B: at…at…on C: at…on…at D: on…on…at ...
(判断题)30: Students increase the sense of serving the people. A: 对 B: 错 ...