由于光辐射而产生游离的形式称为（  ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69492' and id < 4501713 and id<>'4501713' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69492' and id > 4501713 and id<>'4501713' order by id asc limit 5