加工Φ20mm以下未淬火的小孔,尺寸精度IT8,表面粗糙度Ra3.2~1.6,应选用( )加工方案。 加工Φ20mm以下未淬火的小孔,尺寸精度IT8,表面粗糙度Ra3.2~1.6,应选用( )加工方案。(本题2.0分) A、 钻孔-镗-磨 B、 钻-粗镗-精镗 分类:河南农业大学大学英语 题型:选择题 查看答案
We are living in a highly (civilize) society. We are living in a highly (civilize) society. 分类:河南农业大学大学英语 题型:选择题 查看答案
Compared with his sister, Jerry is even more _____ Compared with his sister, Jerry is even more ______ (敏感)to, and more easily trou 分类:河南农业大学大学英语 题型:选择题 查看答案