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  A very rapid increase in the number of cars began almost immediately after they were invented to meet the need for the regular rapid transportation and convenience.The car is such a part of our everyday life and so much taken for granted nowadays that we rarely think twice when we get into it and get it started.The USA is even referred to as“a nation on wheels”.But how many of you have ever thought how the car is designed and operated?

  In cars of normal design, the petrol system is made up of three main parts:storage tank, a pump and a carburetor.

  The petrol tank is fitted at the back of the car where it is out of the way, yet easily filled at a gas station.Tanks are in various capacity but they usually hold enough petrol for 250-300 miles running.Because the tank is at the opposite end of the car from the carburetor, which is fitted high up on the engine, a pump is needed to draw the petrol from one to the other, so it is from the carburetor that the petrol is finally fed into the engine.Pumps can be of two kinds:electrically operated or mechanically driven from the engine.

  Next time when you are driving a car, you may wonder what a great and magic invention the car is.

(1)

Choose one picture which shows the correct petrol system described in this passage.

[  ]

A.

B.

C.

D.

(2)

The passage tells the reason why ________.

[  ]

A.

there are different types of tanks in capacity

B.

the tank is designed at the back of the car

C.

the pump is mechanically driven from the engine

D.

the petrol is fed into the engine from the carburetor

(3)

It is necessary to use a pump to send petrol to carburetor because ________.

[  ]

A.

the engine needs supplying with a certain amount of petrol

B.

the pump can press the petrol to recycle

C.

the carburetor has difficulty in drawing petrol from the tank

D.

the tank isn't fitted in proper position

答案:1.D;2.B;3.C;
解析:

(1)

細節題.根據The petrol tank is fitted at the back of the car where it is out of the way(油箱放在車子的后外側)可排除B.Because the tank is at the opposite end of the car from the carburetor, which is fitted high up on the engine, a pump is needed to draw the petrol from one to the other, so it is from the carburetor that the petrol is finally fed into the engine.中可知油箱與汽化器分別在車的兩頭,一前一后,汽化器置于發動機的上方,泵將油箱的油吸入汽化器后,油再進入發動機.D項的圖示符合原理.

(2)

推斷題.從yet easily filled at a gas station可知油箱設置在車的后部(the tank is designed at the back of the car)的原因.

(3)

判斷題.文中提到油必須由泵來吸入汽化器,這說明直接用汽化器吸油是很難的(the carburetor has difficulty in drawing petrol from the tank).


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