下列哪一生理或病理过程属于正反馈（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25931' and id < 2179232 and id<>'2179232' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25931' and id > 2179232 and id<>'2179232' order by id asc limit 5