故障选相元件应能保证动作选择性。（）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='33741' and id < 2729203 and id<>'2729203' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='33741' and id > 2729203 and id<>'2729203' order by id asc limit 5