差动保护从原理上来讲更适用于（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69394' and id < 4492110 and id<>'4492110' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69394' and id > 4492110 and id<>'4492110' order by id asc limit 5