题目内容

按照配合的松紧不同,平键联接的配合分为()。

A. 松联接
B. 正常联接
C. 紧密联接
D. 一般联接

查看答案
更多问题

Why does the supplier reject the buyer's request for reduction of orders in Dialogue 3?

A. The products the buyer has ordered has been produced totally.
B. The supplier is going to arrange transportation soon.
C. The products the buyer has ordered are customerized(定制的).
D. The supplier may suffer from some losses.

动力电池组的总电压可以达到:

A. 36~88V
B. 420~500V
C. 90~400V
D. 12~35V
E. :C
F. 程度:中
G. :单选题

电线杆拉线的拉杆螺栓联接,其两端螺纹的旋向( )

A. 正扣
B. 反扣
C. 一个正扣一个反扣

在常用的螺旋传动中,传动效率最高的螺纹是()

A. 三角
B. 锯齿
C. 梯形
D. 矩形

答案查题题库