含量在20%以上具有防腐作用的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30289' and id < 2449138 and id<>'2449138' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30289' and id > 2449138 and id<>'2449138' order by id asc limit 5