采用销连接分削弱轴的强度，因此用来传递不大的载荷。
查看答案
切向键连接的最大优点是轴与轮的对中性好。
A. 对
B. 错
Which of the following is NOT a reason why soap operas are popular?
A. They are about activities in our daily lives.
B. They are about popular stars' daily lives.
C. They provide easy entertainment.
D. They use a technique called the "cliff-hanger" ending.
The stories of soap operas are often based on _________ .
A. personal relationships
B. family life
C. both A and B
D. neither A nor B
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