我国标准规定加速器旋转运动标尺的零刻度位置的检定周期为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='29523' and id < 2401448 and id<>'2401448' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29523' and id > 2401448 and id<>'2401448' order by id asc limit 5