在双母线同时运行时的母线完全差动保护中，大差动的作用是(    )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id < 4501565 and id<>'4501565' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69493' and id > 4501565 and id<>'4501565' order by id asc limit 5