110kV交联聚乙烯外护层耐压试验,是在每相金属屏蔽、金属护套与大地间加直流电压(),1min。
A.10kV;
B.15kV;
C.20kV;
D.25kV。
参考答案:A
大额保单失效率()小额保单失效率。
A.高于
B.低于
C.等于
D.高于或低于
We should make____a rule for us that the last to leave the classroom shall turn the light off.
A.it
B.that
C.one
D.all