问题 问答题

电动机轴承润滑脂填加量的标准是什么?

答案

参考答案:一般内油盖充入量控制在1/6-1/3油室空间,外油盖充油量控制在1/3-2/3油室空间。轴承本身充入量控制在轴承总空间的1/2-2/3,对高速电机润滑脂应少一些,超过或低于这个标准都不利于轴承的运行。

阅读理解

阅读理解。

    In college , Spring Break (春假) is usually associated with the beach, parties and sleepless nights,

bringing about relaxation, free time and friends. Students who wish to spend their break doing

something productive and rewarding, however, may choose to participate in the Altemative Break

Program. It places college students in communities both at home and abroad.

      The Program allows students to take part in various projects dealing with  issues  such  as  

literacy  (识字 ) , homelessness  and  the environment. It includes helping kids with their lessons,

raising money for families in need and collecting data for environmental research.

     The hope is that, by getting themselves involved in different environments, students will have the

opportunity to learn about members of communities and broaden their view. In turn, they will

incorporate (融合) their experiences and lessons learned into their own communities. In a word ,

the Program aims to encourage students to be active citizens and engage themselves in making a

difference in society.

     In the spring of 2006, about 36, 000 students in the USA participated in the Altemative Break

Program.

     Samantha Giacobozzi, now director of the Program, has been on five alternative break trips herself,

including trips to New Orleans, India and Dominican Republic. "I was a student who went on alternative

break trips and had my life totally transformed by that experience , " she said. " Every year , we meet

many students who have attended the Program. You can see changes in their life that are connected

with their altemative break experiences. "

     The Program began in  1991. Today , it  has  become  increasingly popular with college students

in the United States.

1. Who may choose to participate in the Altemative Break Program?

  ( No more than 10 words)

___________________________________________________________________

2. What is the aim of the Program?  ( No more than 15 words)

____________________________________________________________________

3. What is the meaning of the underlined word "transformed" in

  Paragraph 5? (1 word)

_____________________________________________________________________

4. What is Samantha's attitude toward the Program?  ( No more than

   10 words)

______________________________________________________________________

5. If you take part in the Program,which project are you interested

   in? And why?  ( No more than 25 words)

_______________________________________________________________________

单项选择题