交流接触器吸引线圈的工作电压在额定电压的()范围内应能保证吸合。
A.70%-90%
B.75%-95%
C.80%-100%
D.85%-105%
参考答案:D
---Excuse me, does Mr. Zhang’s son live here?
---He________ be here, but he has moved?
A.used to
B.was used to
C.got used for
D.did use to
汽轮机从打闸停止进汽开始至转子静止,这段时间称()时间。