小接地电流系统发生单相接地故障时有（    ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69481' and id < 4500225 and id<>'4500225' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69481' and id > 4500225 and id<>'4500225' order by id asc limit 5