(    )是系统中无功功率的主要消耗者。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id < 4498479 and id<>'4498479' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69460' and id > 4498479 and id<>'4498479' order by id asc limit 5