对于普通平键连接，主要失效形式是工作面的压溃，有时也会出现键的剪断。
查看答案
花键连接的承载能力高，定心性和导向性好，对轴的削弱小，但加工花键需专门的设备和刀具，成本高。
A. 对
B. 错
The company whose CEO was recently dismissed is now performing ______.
A. strongly
B. stronger
You should not send ______ information such as your ID number via email.
A. personally
B. personal
When you are talking with your customers, you must avoid _____ with them.
A. to argue
B. arguing
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