按规定在焊接作业时，乙炔瓶和氧气瓶之间的间距应不少于7m，两者距明火之间的距离不少于（ ）m。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='24819' and id < 2121767 and id<>'2121767' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24819' and id > 2121767 and id<>'2121767' order by id asc limit 5