仅作为企业内部技术经济考核而不是作计费用的2.0级有功电能表及3.0级无功电能表,宜配用的互感器等级应不低于()级。
A.0.5
B.1.0
C.1.5
D.2.0
参考答案:B
Out _____, with a stick in his hand. [ ]
A. did he rush
B. rushed he
C. he rushed
D. he did rush
简述油封顶原因及处理方法。