短路电流中一定存在零序分量的短路类型是(  )。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69515' and id < 4503478 and id<>'4503478' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69515' and id > 4503478 and id<>'4503478' order by id asc limit 5