食道癌中下段等中心定位时，把模拟中心放在肿瘤中心，照射野一般在肿瘤上下各放多长

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29151' and id < 2371473 and id<>'2371473' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29151' and id > 2371473 and id<>'2371473' order by id asc limit 5