220KV验电器怎样使用?
参考答案:
选用电压等级合适的验电器。先在有电设备上确证好用,应有蜂鸣,通过拉伸拉杆,在相应的设备上验电。使用时应注意安全距离。
I called you at 7:00 yesterday evening,but no one answered.
Sorry,I_______ with my family at that time in the cinema.
A.am watching a movie
B.watched a movie
C.was watching a movie
D.have been watching a movie
黄连用治肝火犯胃,肝胃不和,常配伍( )。
A.茵陈B.吴茱萸C.木香D.苍术E.黄柏