题目内容

Today, I am delighted to announce the opening of our new branch in this neighborhood. We hope we’ll be able to meet the demands of the local11. You’ll notice that the branch is staffed by local people. Because we feel they’ll have more 12of your particular needs. We have extended our13because this has been one of the suggestions we have been given. So whether you are an early riser or you work late, we will be able to meet your particular14. Our aim is to serve you, the local people locally. I promise you that offering15is always our top priority.

查看答案
更多问题

齿轮采用渗碳淬火的热处理方法,则齿轮材料只可能是__。

A. 45号钢
B. ZG340~640
C. 40Cr
D. 20CrMnTi

对于开式齿轮传动,在工程设计中,一般__。

A、按接触强度设计齿轮尺寸,再校核弯曲强度
B、按弯曲强度设计齿轮尺寸,再校核接触强度
C、只需按接触强度设计
D. 只需按弯曲强度设计

闭式软齿面常见的失效形式有______。

A. 点蚀
B. 磨损
C. 胶合
D. 断裂

一对啮合齿轮,使小齿轮齿宽略大于大齿轮齿宽的目的是_______。

A. 提高小齿轮齿根弯曲强度
B. 补偿安装误差,保证全齿宽接触
C. 减小小齿轮载荷分布不均
D. 减小小齿轮齿根弯曲强度

答案查题题库