The final examination is coming up soon. It’s time for us to our studies. A. get down to B. get out C. get back for D. get over 题目和参考答案——青夏教育精英家教网—

题目内容

The final examination is coming up soon. It’s time for us to ________ our studies.

A. get down to B. get out

C. get back for D. get over

解析:

get down to认真对待；get out离开，逃走，出版；get over克服，恢复，结束 (不愉快之事)。

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B．ringing

C．calling

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A．modestly

B．naturally

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A．popular

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Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density(密度)”，said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope(放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanical systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor(半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure(晶体结构) of the solid semiconductor,” Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

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A. He teaches chemistry at MU.

B. He developed a chemical battery.

C. He is working on a nuclear energy source.

D. He made a breakthrough in computer engineering.

2. Jae Kwon gave examples in Paragraph 4_________.

A. to show chemical batteries are widely applied.

B. to introduce nuclear batteries can be safely used.

C. to describe a nuclear-powered system.

D. to introduce various energy sources.

3.Liquid semiconductor is used to _________.

A. get rid of the radioactive waste

B. test the power of nuclear batteries.

C. decrease the size of nuclear batteries

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4. According to Jae Kwon, his nuclear battery _______.

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B. will soon replace the present ones.

C. could be extremely thin

D. has passed the final test.

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A. science news report B. book review

C. newspaper ad D. science fiction story

PART FOUR WRITING (45%)

Recently a man came to me, because he was told that there is fluid(积液) around his heart. After trying many drugs which were of no use to reduce the fluid, the doctor told him the only other choice was to have an operation. He refused because he knew that every illness has a mental cause and that if he had the operation but did not clear the mental cause, the fluid would return. At last, he searched the Internet to find a metaphysical healer(玄学治疗师), and he found me.

The mental cause of his disease was an experience of breaking up five years ago with several friends, whom he had known for over twenty years. This experience broke his heart. Not knowing how to “mend” his broken heart, his body created a “repair” by surrounding his heart with fluid to protect it from the sad feelings.

Our work focused on reminding him of the feelings of being loved and forgiving his friends. Months later, his hearts was mended and the fluid disappeared. He left my office after the final session with a smile on his face and a spring in his step.

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taking many medicines ‚ having an operation

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Hidden in our subconsciousness (意识) is a perfect mental picture. We see ourselves on a long trip that goes across the continent. We are traveling by train. Out of the windows, we think in the passing scene of cars on nearby highways, of children waving at a crossing, of cattle feeding on a distant hillside, of smoke pouring from a power plant, or row upon row of corn and wheat, of flat lands and valleys, of mountains and rolling hills, of city skylines and village halls.

But uppermost in our minds is the final destination. On a certain day at a certain hour, we will pull into the station. Bands will be playing and flags waving. Once we get there, so many wonderful dreams will come true and the pieces of our lives will fit together like a completed jigsaw (拚图玩具) puzzle. How restlessly we pace the aisles(通道) ,condemning the minutes for loitering-waiting, waiting, waiting for the station.

‘‘When we reach the station, that will be it!” we cry, “When I'm 38.” “When I buy a new 450SL Mercdes Benz!” “When I put the last kid through co llege.” “When I have paid off!” “When I get a promotion.” “When I reach the age of retirement, I shall live happily ever after! " Sooner or later, we must realize there is no station, no one place to arrive at once and for all. The true joy of life is the trip. The station is only a dream. It constantly outdistances us.

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1..

Why does the author describe the mental picture?

A. To lead us into a perfect world. B. To let people enjoy the scenery.

C. To introduce an actual trip of his. D. To compare it to our life's journey.

2..

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A. Puzzled. B. Happy. C. Relaxed. D. Impatient.

3..

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4..

Why does the author write the passage?

A. To teach us a good lesson. B. To tell us the right attitude to life.

C. To advise us to forget our worries. D. To stop us wandering along the aisles.

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