图中沙丘由风力沉积形成，A,B,C,D中正确表示风向的是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19472' and id < 1686077 and id<>'1686077' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19472' and id > 1686077 and id<>'1686077' order by id asc limit 5