相对标准偏差用来表示

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30783' and id < 2478893 and id<>'2478893' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30783' and id > 2478893 and id<>'2478893' order by id asc limit 5