当加速器治疗床步进距离的误差为2mm时，剂量不均匀性可达

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29412' and id < 2394982 and id<>'2394982' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29412' and id > 2394982 and id<>'2394982' order by id asc limit 5