凡参加高处作业的人员，应每（   ）进行一次体检。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69528' and id < 4504968 and id<>'4504968' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69528' and id > 4504968 and id<>'4504968' order by id asc limit 5