题目内容
医用加速器电子线治疗能量范围为
2021-12-13
A.4〜15MeV
B.10〜25MeV
C.10〜20MeV
D.4〜25MeV
E.4〜20MeV
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='29520' and id < 2401144 and id<>'2401144' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29520' and id > 2401144 and id<>'2401144' order by id asc limit 5