黑色素瘤多发生于白种人，尤其是有日晒史的人群，而我国发病率较低，约为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29405' and id < 2394508 and id<>'2394508' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29405' and id > 2394508 and id<>'2394508' order by id asc limit 5