继电保护的作用不包括（  ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69477' and id < 4500119 and id<>'4500119' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69477' and id > 4500119 and id<>'4500119' order by id asc limit 5