采用高速旋杯式自动静电喷涂机时,涂料液滴雾化直径可达到( )μm。
A.20~30
B.30~50
C.50~100
D.100~200
参考答案:C
Nowadays, in some western countries, coffee is ____ most popular drink, while tea comes ____ second.
A.a; the
B.the; the
C.the; /
D.a; /
10(6)kV变电所当露天或半露天变压器供给一级负荷用电时,相邻的可燃性油浸变压器的防火净距不应小于5m,若小于5m时,应设置防火墙。( )