问题 填空题

现代社会中汽车是一种重要的交通工具,很多汽车使用的发动机是四冲程汽油机,在它工作的过程中,在______冲程中将机械能转化为内能,此冲程是通过______方式改变了缸内气体的内能.为了降低汽缸体的温度,汽缸外有一个水箱体,使汽缸被水包围着,这是通过______的方式减少汽缸内能的.

答案

(1)在汽油机的压缩冲程中,活塞压缩混合气体做功,机械能转化为内能,是通过做功的方式改变缸内气体的内能;

(2)内燃机汽缸外有一个水套,让汽缸被水包围着,水从汽缸吸收热量,使汽缸的温度降低,这是通过热传递的方式改变汽缸的内能;

故答案为:压缩;做功;热传递.

阅读理解

阅读理解

     If you are looking for a summer camp job opportunity, the following are some summer camp jobs

available for 2010 summer.

     1. Fishing / Fly-fishing

     Male 21+. Teach fishing and fly-fishing (用假蝇钓鱼) techniques. Live with 6-8 campers, teach

basic outdoor skills, lead backpacking trips and assist with canoe trips.

    Salary: $2,400.00-$3,000.00

     Roaring Brook Camp for Boys

    480 Roaring Brook Road

    Bradford, Vermont 05033, USA

    Contact: Dr. Candice Raines at (800) 802-747-0282

    2. Athletic Trainer

    International Sports Training Camp is a specialized sports camp located on a private 100-acre lake

in the scenic Pocono Mountains of Northeastern Pennsylvania. We are famous for our outstanding

facilities, innovative (创新的) programs and friendly staff. We are looking for both students and certified

athletic trainers.

     Salary: $2,500.00

     International Sports Training Camp.

    1100 Twin Lake Road

    Stroudsburg, Pennsylvania 18360, USA

    Contact: Kara Klaus at (570) 6202267

    3. Head Cook

     Manage kitchen staff of 4, order food and prepare meals and snacks for 50-60 campers and staff

daily during sessions and training periods.

    Salary: $3, 000.00-$4,000.00

     Burgundy Center for Wildlife Studies

    HC 83, Box 38DD

    Capon Bridge, West Virginia 26711, USA

    Contact: Vini Schoene at (540) 465-1516

    4. Drama Department Head

     Camp Airy (for boys) is seeking an experienced individual with a theater background and experience

in directing children's productions. Supervise counselor staff and direct two major productions in our

600-seat Outdoor Theatre. Our summer season runs from June 17 to August 18. Be sure to visit our

outstanding website at www.airylouise.org.

    Salary: Depends on Experience.

     Camp Airy & Camp Louise

    14938 Old Camp Airy Road

     Thurmont, Maryland 21788, USA

    Contact: Steve Goldklang at (410) 466-9010

1. Who would be most interested in the passage?

A. College teachers.      

B. Online bloggers.    

C. Holiday-goers.      

D. Job seekers.

2. Mr. Smith is good at fishing and he plans to spend the summer doing what he loves and earn

    some money. Which number should he dial?

A. (570) 6202267.          

B. (540) 465-1516.

C. (800) 802-717-0282.      

D. (410) 466-9010.

3. Which of the following statements about Athletic Trainer is TRUE?

A. College graduates are preferred.      

B. Only professional athletes can apply.

C.This position offers a monthly salary of $3,500.

D. Applicants can get in touch with Kara Klaus.

4. Which of the following organizations offers a salary depending on experience?  

A. Camp Airy & Camp Louise.      

B. International Sports Training Camp.

C.Roaring Brook Camp for Boys.    

D. Burgundy Center for Wildlife Studies.

单项选择题