同期继电器是反应母线电压和线路电压的（  ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id < 4500991 and id<>'4500991' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69479' and id > 4500991 and id<>'4500991' order by id asc limit 5