3000MW以上的系统频率容许偏差为（）Hz。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32642' and id < 2595573 and id<>'2595573' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32642' and id > 2595573 and id<>'2595573' order by id asc limit 5