需求曲线是显示（ ）与需求量关系的曲线。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='31470' and id < 2523432 and id<>'2523432' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31470' and id > 2523432 and id<>'2523432' order by id asc limit 5