下列生理活动过程中存在正反馈的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28371' and id < 2320027 and id<>'2320027' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28371' and id > 2320027 and id<>'2320027' order by id asc limit 5