絕緣技術(shù)監(jiān)督上崗員監(jiān)督標(biāo)準(zhǔn)規(guī)范單項選擇題每日一練(2019.01.16)

A.15s
B.10s
C.5s
D.20s

A.2%
B.2.5%
C.3%
D.3.5%

A.15min
B.10m
inC.5min
D.20min

A.5V
B.10V
C.15V
D.20V

A.5℃
B.6℃
C.8℃
D.10℃