通信標(biāo)準(zhǔn)通信電源設(shè)備安裝工程設(shè)計(jì)規(guī)范(YD/T 5040-2005)單項(xiàng)選擇題每日一練(2019.01.15)

A.2
B.3
C.4
D.5

A.0.1m
B.0.2m
C.0.3m
D.0.4m

A.40%
B.50%
C.60%
D.70%

A.5
B.6
C.7
D.8

A.0.5
B.1
C.1.5
D.2.5