在圆筒形壳体中径向应力是环向应力的（ ）倍。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='24904' and id < 2124936 and id<>'2124936' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24904' and id > 2124936 and id<>'2124936' order by id asc limit 5