题目内容
对齿轮轮齿材料的基本要求是( )。
2021-10-04
A.齿面要硬,齿芯要軔
B.齿面要硬,齿芯要脆
C.齿面要软,齿芯要脆
D.齿面要软,齿芯要韧
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='24895' and id < 2124529 and id<>'2124529' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='24895' and id > 2124529 and id<>'2124529' order by id asc limit 5