题目内容

8. Tourists may be defined _______ persons who travel away from their home for a period not exceeding one year.

A. for
B. as
C. to
D. by

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9. According to the contract, the salary of the employee_______ for the whole contract period.

A. is fixing
B. is fixed
C. fixes
D. to fix

10. The hotel charges $20 a day, exclusive _______ meals.

A. in
B. for
C. on
D. of

倒档惰轮位于倒档主动齿轮和倒档从动齿轮之间,则倒车时倒档从动齿轮( )

A. 转动方向与倒档主动齿轮相同
B. 转动方向与倒档主动齿轮相反
C. 保持静止
D. 转动方向与倒档主动齿轮无关

变速器中的倒档中间齿轮(惰轮)的作用是( )。

A. 改变传动比
B. 改变传动比和传动方向
C. 改变传动方向
D. 变速变矩