数字式万用表当数值左边出现“—”时,则表示表笔极性与实际电源极性()。
查看答案
测量电动车电瓶电压时,应选择万用表的( )。
A. 欧姆档
B. 直流电压档
C. 交流电压档
D. 蜂鸣档
Who is the man _______ made a mistake yesterday?
A. who
B. whom
C. that
D. which
The boss is satisfied with _______ you have done.
A. all that
B. that
C. which
D. all what