下面所列各种电力网接线方式中，属于有备用接线方式的是(    )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69457' and id < 4498214 and id<>'4498214' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69457' and id > 4498214 and id<>'4498214' order by id asc limit 5