商品的交换原则是（ )

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29487' and id < 2399734 and id<>'2399734' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29487' and id > 2399734 and id<>'2399734' order by id asc limit 5