保护接地是将电气设备的(    )与接地网的接地极连接起来。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69523' and id < 4504166 and id<>'4504166' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69523' and id > 4504166 and id<>'4504166' order by id asc limit 5