智能变电站一体化监控系统的结构分为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29474' and id < 2398471 and id<>'2398471' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29474' and id > 2398471 and id<>'2398471' order by id asc limit 5