.安全净距是指配电装置处于(    )时，其空气间隙不会被击穿的最小距离。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69521' and id < 4504005 and id<>'4504005' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69521' and id > 4504005 and id<>'4504005' order by id asc limit 5