光缆架空线路防护接地设置在100<ρ(地阻率)≤500Ω情况下,其维护指示应小于或等于()Ω。
A、5
B、10
C、15
D、20
参考答案:C
Nowadays, few people form the habit of keeping the habit of candles in the house in case of power .
A.drop
B.lack
C.absence
D.failure
即时检测(POCT)