停用电压互感器，应事先取得（）的许可
A.巡视人员
B.有关负责
C.检修人员
D.试验人员
参考答案：B
—Can you ____ a good way to solve the problems?
—Sorry, I can't. But I believe somebody can. [ ]
A. give up
B. think over
C. come up with
螺栓孔孔壁表面粗糙使用（）检验
A.游标卡尺
B.卡尺
C.螺旋测微器
D.钢尺
