2.In regenerative braking,________.
A.the conventional brakes are used to slow down the car
B.energy wasted in conventional cars is stored in the battery
C.the battery charges itself when the car is accelerating
D.the petrol engine is usually turned off automatically
3.From the last paragraph we can learn that hybrid cars ________.
A.will gain more popularity
B.were first available in the USA
C.free their owners from tax
D.are free to park anywhere in the city4.The main purpose of this text is to ________.
A.show how hybrid cars slow down
B.encourage people to buy hybrid cars
C.inform people of a kind of energysaving car
D.explain why hybrid cars use less energy
答案:
解题导语:文章介绍了以汽油和电为动力的混合动力车,它是一种节约能源的汽车。
1.D 解析:细节理解题。根据第三段中的第二句“Hybrid cars have much smaller petrol engines, improved by electric motors when needed, so they use less petrol.”可知,混合动力车必要时有电力支持,所以消耗较少的能源。
2.B 解析:细节理解题。根据第三段可知,混合动力车用电动马达减速而不是用传统的刹车,电动马达降低车速时产生的电能会被自动储存在电池里,而传统汽车浪费了刹车时产生的能量,由此可知B项表述正确。
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