The very ubiquity of electronic communications can have a surprising downside, notes Richard Kohn, a military historian at the University of North Carolina: a wire becomes accustomed to frequent email from her husband, until he can’t get to a computer. And then her anxiety increases.

A．failure

B．underside

C．drawback

D．consequence

当电压互感器出现（）情况时，应停用。

A.渗漏严重

B.高压熔丝连续熔断2-3次

C.套管破裂严重

D.有喷油现象