题目内容

切向键连接的最大优点是轴与轮的对中性好。

A. 对
B. 错

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请简述平键的特点与应用场合。

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

Which of the following topic may NOT interest the viewers?

A. career
B. birth
C. death
D. marriage

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