根据IEC61850通信协议定义，数字化变电站在逻辑结构上可分为（   ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69524' and id < 4504320 and id<>'4504320' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69524' and id > 4504320 and id<>'4504320' order by id asc limit 5