题目内容
锥形封头一般用作下封头,主要是为了( )。
2021-10-04
A.与筒体施焊容易
B.避免应力集中
C.与接管连接方便
D.易于排料
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='24907' and id < 2125065 and id<>'2125065' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24907' and id > 2125065 and id<>'2125065' order by id asc limit 5