2012年12月英语四级考试考前预测试卷

　　选择

　　1. An object, if moving rhythmically when stimulated in a natural period, is said to __

　　[A] vibrate

　　[B] resonate

　　[C] swing

　　[D] oscillate

　　2. The distance a swing moves from its resting position is called its __

　　[A] revolution

　　[B] movement

　　[C] frequency

　　[D] amplitude

　　3. A tachometer is an instrument that uses resonance to determine

　　[A] the speed of a motor in revolutions

　　[B] the frequency at which a motor vibrates

　　[C] the amplitude of an engine that oscillates

　　[D] the changes in a dial within a car engine

　　4.

　　An annoying vibration can be caused at the natural resonance of the car's engine mount __

　　[A] if the engine moves too fast

　　[B] if the engine's amplitude increases

　　[C] if a tire gets out of balance

　　[D] if damage occurs in the engine

　　5. In which of the following cases is it useful to consider the relationship between the length of an oscillating object and its natural period?

　　[A] Adjusting the speed of a car.

　　[B] Adjusting a clock pendulum.

　　[C] Adjusting tire balance.

　　[D] Adjusting engine mounts

　　6. Part III Reading Comprehension (Reading in Depth) (25 minutes)

　　Questions47~56are based on the following passage。

　　A sunflower is a sunflower. A mobile phone is a mobile phone. But can you47the two to do something for your local48? It may well be possible. When you have finished with your mobile phone you will be able to49it in the garden or a plant pot and wait for it to flower.

　　50, a biodegradable(生物可降解的) mobile phone was introduced by scientists. It is hoped that the new type of phone will encourage51to recycle.

　　Scientists have come up with a new material over the last five years. It looks like any other52and can be hard or soft, and able to change shape. Overtime it can also break down into the soil without giving out any toxic53. British researchers

　　used the new material to develop a phone cover that contains a sunflower seed. When this new type of cover turns into waste, it54nitrates (硝酸盐). These feed the seed and help the flower grow.

　　Engineers have designed a small55window to hold the seed. They have made sure it only grows when the phone is thrown away.

　　"We've only put sunflower seeds into the covers so far. But we are working with plant56to find out which flowers would perform best. Maybe we could put roses in next time," said one scientist.

　　注意：此部分试题请在答题卡2上作答。

　　7. (47)_________

　　8. (48)______

　　9. (48)______

　　10. (49)______

　　11. (50)______

　　12. (51)______

　　13. (52)______

　　14. (53)______

　　15. (54)______

　　16. (55)______

　　17. (56)______

　　18. Which of the following is seen as the cause of class differences in the past?

　　[A] Life style and occupation.

　　[B] Attitude and income.

　　[C] Income and job security.

　　[D] Job security and hobbies.

　　19. The writer seems to suggest that the description of______is closer to truth.

　　[A] middle-class ways of spending money

　　[B] working-class ways of spending the weekend

　　[C] working-class drinking habits

　　[D] middle-class attitudes

　　20. According to the passage, which of the following is NOT a typical feature of the middle-class?

　　[A] Desiring for security.

　　[B] Making long term plans.

　　[C] Having priorities in life.

　　[D] Saving money.

　　21. Working-class people's sense of security increased as a result of the following factor except

　　[A] better social security

　　[B] more job opportunities

　　[C] higher living standard

　　[D] better legal protection

　　22. Which of the following statement is incorrect?

　　[A] Changes are slowly taking place in all sectors of the British society.

　　[B] The gap between working-class and middle-class young people is narrowing.

　　[C] Different in income will remain but those in occupation will disappear.

　　[D] Middle-class people may sometimes feel inferior to working-class people.

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