问题 单项选择题

主轴部件的精度包括主轴的径向圆跳动、()以及主轴旋转的均匀性和平稳性。

A、加工精度

B、装配精度

C、位置精度

D、轴向窜动

答案

参考答案:D

单项选择题 案例分析题
阅读理解

阅读理解。

        On the evening of June 21, 1992, a tall man with brown hair and blue eyes entered the beautiful hall

of the Bell Tower Hotel in Xi’an with his bicycle. The hotel workers received him and telephoned the

manager, for they had never seen a bicycle in the hotel ball before though they lived in “the kingdom of

bicycles.”    

        Robert Friedlander, an American, arrived in Xi’an on his bicycle trip across Asia which started last

December in New Delhi, India.    

        When he was 11, he read the book Marco Polo and made up his mind to visit the Silk Road. Now,

after 44 years , he was on the Silk Road in Xi’an and his early dreams were coming true.     

        Robert Friedlander’s next destinations (目的地) were Lanzhou, Dunhuang, Urumqi, etc. He will

complete his trip in Pakistan.

1. The best headline(标题) for this newspaper article would be ______     .  

A. The Kingdom of Bicycles        

B. A Beautiful Hotel in Xi’an   

C. Marco Polo and the Silk Road  

D. An American Achieving His Aims

2. Friedlander is visiting the three countries in the following order, _______   .  

A. China, India, and Pakistan    

B. India, China, and Pakistan   

C. Pakistan, China, and India    

D. China, Pakistan, and India

3. What made Friedlander want to come to China?  

A. The stories about Marco Polo .

B. The famous sights in Xi’an .  

C. His interest in Chinese silk.  

D. His childhood dreams about bicycles .

4. Friedlander can be said to be _______      .  

A. clever    

B. friendly    

. hardworking

D. strong-mindedC