若厂商的销售收入随着商品价格的上升而减少，那么这种产品的需求弹性为（ )

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='31436' and id < 2520118 and id<>'2520118' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31436' and id > 2520118 and id<>'2520118' order by id asc limit 5