用聚乙二醇作软音基质时常采用不同分子 量的聚乙二醇混合，其目的是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29785' and id < 2418509 and id<>'2418509' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29785' and id > 2418509 and id<>'2418509' order by id asc limit 5