双母线接线的母差保护、断路器失灵保护应经复合电压闭锁。（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69381' and id < 4491754 and id<>'4491754' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69381' and id > 4491754 and id<>'4491754' order by id asc limit 5