Scientists would like to place a huge mirror in space above the earth. It might be sixty miles wide. It would be used to catch the rays (光线) of the sun. It would direct the sun’s rays upon the earth as a child might do to make sunlight dance on the wall with a hand mirror.
Why do they want to do this? The sun’s rays could be helpful in many ways. They could light up cities by night. The warm rays could stop frosts (霜冻) which might come at night and hurt fruit crops. They could melt (融化) dangerous icebergs in the ocean. Perhaps they could change cloud movements and bring rain where it is needed.
【小题1】The huge mirror would ______.
| A．stand 60 miles in height (高度) | B．be 60 miles from side to side |
| C．cover 60 miles of the earth | D．be 60 miles above the earth |
| A．reflect (反射) sunlight | B．absorb (吸收) sunlight |
| C．see what the earth looks like | D．see how clouds move |
| A．hurt fruit crops | B．set fire to cities |
| C．bring longer daytime | D．shine through walls |
| A．something in a story | B．already made |
| C．just an idea | D．to be made soon |
【小题1】B
【小题2】A
【小题3】C
【小题4】C
解析试题分析：本文叙述了科学家的一种想象，在地球的上方放一面60英里宽的镜子，它可以用来为城市延长照明的时间，它的能量可以融化霜冻，以防霜冻冻坏庄稼。还可以融化冰山，能够改变云的运动以便在需要雨的地方降雨。
【小题1】细节理解题。根据It might be sixty miles wide.故选B。
【小题2】细节理解题。根据It would be used to catch the rays (光线) of the sun. It would direct the sun’s rays upon the earth as a child might do to make sunlight dance on the wall with a hand mirror. 镜子能反射阳光，故选A。
【小题3】细节理解题。根据They could light up cities by night. 故选C。
【小题4】细节理解题。根据Scientists would like to place a huge mirror in space above the earth. It might be sixty miles wide. 这是科学家的想象出来的，故选C。
考点：科普类短文阅读。
点评：细节题为阅读考题的重头戏，所占比例高达80% ，相对而言较简单，因为这类题虽然要求理解准确，但基本上限于字面意义的理解，范围也限于局部，因此是我们可望得高分的部分。细节题绝大部分体现“中心思想是解”这一原理。本文都是细节理解题，在文中比较容易找到答案。
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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.
Which of the following is true of Jae Kwon?
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.
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.
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
D. reduce the damage to lattice structure.
According to Jae Kwon, his nuclear battery _______.
A. uses a solid semiconductor
B. will soon replace the present ones.
C. could be extremely thin
D. has passed the final test.
The text is most probably a ________.
A. science news report B. book review
C. newspaper ad D. science fiction story
PART FOUR WRITING (45%)
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65 When a goby grows to within 5-10% of the size of its larger competitor, it ______.
A. faces danger B. has breeding rights
C. eats its competitor D. leaves the group itself
66. The underlined words “the evicted fish" in Paragraph 3 refer to _____.
A. the fish beaten up B. the fish found out
C. the fish fattened up D. the fish driven away
67 The experiment showed that smaller fish ____.
A. fought over a feast B. went on diet willingly
C. preferred some extra food D. challenged the boss fish
68. What is the text mainly about?
A. Fish dieting and human dieting.
B. Dieting and health.
C. Human dieting.
D. Fish dieting.
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A.The tools he uses.
B.His ways of learning.?
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D.The various tools he uses.?
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A.the importance of information
B.the difference between scientists and ordinary people?
C.the importance of thinking
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