组分物料堆密度不同时，应采用的混合方法是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29766' and id < 2417084 and id<>'2417084' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29766' and id > 2417084 and id<>'2417084' order by id asc limit 5