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简述点火装置的功用？

答案

参考答案：

将蓄电池或发电机供给的低压电（12～14V）变成高压电（15～20KV），并根据发动机各气缸的工作顺序和点火时间的要求，适时、准确地将高压电分送给各气缸的火花塞，在其电极间隙处产生电火花，点燃气缸内的可燃混合气，并能根据转速、负荷等自动调整点火时间

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     There once lived a young man who was always unhappy and complained about his poverty. One
day, he went to see a fortune teller to inquire how to become __1__. The fortune teller said, "Young
man, you are already wealthy now."
     "Where is my wealth?" the young man asked __2__.
     "It is with you. Your __3__ is (are) your wealth. You use them to see this world. You use them to
see all the __4__things in this world. You can read, study and learn. Your hands are your wealth. You
can use them to work. You can use them to hug your beloved ones. Your __5__are your wealth. You
can go to any places. . . " the fortune teller said.
     "You call these wealth? Everyone has them, " the young man said.
     "These are wealth. What you have now are not what others can luckily have. Are you __6__to give
your eyes to me? I am willing to give you a lot of money to __7__ for them, " the fortune teller said.
     "No, are you crazy? I am not going to exchange my eyes for money! They are __8__ to me!" the
young man __9__.
     "Precisely, these are wealth to you. You will not exchange them for money. Furthermore, although
a lot of people have their wealthy things, they do not __10__them or treasure them. They are not __11__
to Heaven for giving them their wealth. They even complain that Heaven is unfair to them. Do you want to
__12__one of them before you will treasure them? " the fortune teller said.
     Everyone is wealthy. But we should not __13__it for granted. We need to treasure our wealth, take
care of it and use it __14__. We should not overuse it because once it is __15__, it is gone forever.
Remember it is our wealth that we do not want to lose.
( )1. A. happy  
( )2. A. anxiously
( )3. A. knowledge
( )4. A. ugly      
( )5. A. legs      
( )6. A. lovely    
( )7. A. charge    
( )8. A. precious  
( )9. A. wept      
( )10. A. see      
( )11. A. grateful
( )12. A. get      
( )13. A. take    
( )14. A. wrongly  
( )15. A. old      		B. young        
B. sadly        
B. skills        
B. beautiful    
B. cars          
B. optimistic    
B. buy          
B. useless      
B. demonstrated  
B. realize      
B. careful      
B. grasp        
B. make          
B. wisely        
B. used          		C. wealthy    
C. quietly    
C. brain      
C. strange    
C. jewels    
C. angry      
C. exchange  
C. extra      
C. smiled    
C. keep      
C. meaningful
C. have      
C. set        
C. naturally  
C. gone       		D. poor      
D. patiently  
D. eyes      
D. useful    
D. banknotes  
D. willing    
D. change    
D. special    
D. yelled    
D. hold      
D. faithful  
D. lose      
D. sell      
D. really    
D. dead      
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阅读理解

阅读理解。

     As an experienced photojournalist in Nashville, Tennessee, I was hired by USA Today newspaper to

photograph a spinal bifida (脊柱畸形) corrective surgical procedure. It was to be performed on a

twenty-one week old fetus (胎儿)in uterus (子宫)at Vanderbilt University Medical Center. At that time, in

1999, twenty-one weeks in uterus was the earliest that the surgical team would consider for surgery. The

worst possible outcome would be that the surgery would cause premature delivery, and no child born earlier

than twenty-three weeks had survived.

     The tension could be felt in the operating room as the surgery began. A typical C-section incision (切口)

 was made to access the uterus, which was then lifted out and laid at the junction of the mother's thighs

(大腿). The entire procedure would take place within the uterus, and no part of the child was to breach the

surgical opening. During the procedure, the position of the fetus was adjusted by gently manipulating ( 熟练

操作) the outside of the uterus. The entire surgical procedure on the child was completed in one hour and

thirteen minutes. When it was over, the surgical team breathed a sigh of relief, as did I.

     As a doctor asked me what speed of film I was using, out of the corner of my eye I saw the uterus

shake, but no one's hands were near it. It was shaking from within. Suddenly, an entire arm thrust out of the

opening, then pulled back until just a little hand was showing. The doctor reached over and lifted the hand,

which reacted and squeezed the doctor's finger. As if testing for strength, the doctor shook the tiny fist.

Samuel held firm. I took the picture! Wow! It happened so fast that the nurse standing next to me asked,

"What happened?" "The child reached out," I said. "Oh. They do that all the time," she responded.

     The surgical opening to the uterus was closed and the uterus was then put back into the mother and

the C-section opening was closed.

     It was ten days before I knew if the picture was even in focus. To ensure no digital manipulation of

images before they see them, USA Today requires that film be submitted (提交) unprocessed. When the

photo editor finally phoned me he said, "It's the most incredible picture I've ever seen."

1. In 1999, people believed that it was ______.

A. possible for a fetus 21 weeks born to survive

B. likely for a fetus born 21 weeks to become deformed (畸形的)

C. right time for a fetus born 21 weeks to receive an operation

D. risky for a fetus 21 weeks in uterus to receive an operation

2. From the second paragraph, we can see that the surgery was ______.

A. challenging but successful

B. demanding and unsuccessful

C. simple and short

D. long-lasting and difficult

3. The underlined"It" in paragraph 3 refers to ______.

A. the shaking of the uterus

B. the arm of the fetus

C. the taking of the picture

D. the head of the fetus

4. From the editor said in the last paragraph, we know the photo editor was very ______.

A. disappointed

B. satisfied

C. annoyed

D. depressed

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