以下不属于削弱气体电离过程的措施是（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69351' and id < 4489485 and id<>'4489485' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69351' and id > 4489485 and id<>'4489485' order by id asc limit 5