架空线路带有高电压的情况下，导线附近的空气游离而产生局部放电现象，称为（）。
A.集肤效应
B.邻近效应
C.电晕现象
D.污闪现象
参考答案：C
I want to return the book to Jack, but I can’t find him.
He the library . you can find him there.
A has been to B has gone to C has left D went to
对于密封件采用橡胶及牛皮的液压系统应使用（）或蓖麻油-醇型的液压油。
A、合成型
B、矿物基型
C、动物基型
