题目
题型：河南省期中题难度：来源：
Portable electronics that can be carried about easily are only as good as their batteries (电池) and, let"s
face it, batteries aren"t very good, especially when compared with, say, petrol, which packs 100 times a
battery"s energy into an equal space. That"s why a large group of mechanical engineers (centered at the
Massachusetts Institute of Technology, but with partners at other universities and companies) are hard at
work in an effort to replace batteries with a tiny engine that runs on fuel. Imagine a battery-free life! When
the fuel runs out in your mobile phone, you just fill up and go.
The engine-about the size of a ten-cent coin-starts with a combustion chamber (燃烧室) that burns
hydrogen. Its tiny parts are etched (蚀刻) onto silicon wafers (硅片) in the same manner that computer
parts are etched onto integrated circuits (集成电路). The first engine is made up of five wafers. And since
these wafers could be produced in much the same way as computer chips, they could probably be produced
quite cheaply.
But the devil in all this nice detail is efficiency. Tiny engine parts don"t always behave like the bigger parts
of the first engine. Something between the parts can slow down the works, according to Columbia University
Professor LucFrechette, one of the engine"s designers. Extreme heat from the combustion chamber is also a
problem, often leaking to other parts of the engine.
The scientists" goal is to create an engine that will operate 10 times better than batteries operate. Frechette
says that a complete system, with all parts in place and working, will be set up in the next couple of years,
but commercial models aren"t likely until at least the end of the next ten years.
B. petrol will be used instead of batteries
C. the time of batteries will be gone forever
D. pollution problems caused by batteries must be solved
B. Advantage
C. Invention
D. Technique
B. The new engine has been produced in large quantities.
C. The new invention is much cheaper than the battery.
D. The new engine needs to be improved before it"s on sale.
答案
核心考点
举一反三
Then you are probably quiet, shy, and you would rather follow than lead. You tend to be a pessimist (悲观主
义者). At least, this is what psychologists tell us, and they should know, because they have been seriously
studying the meaning of colour preference, as well as the effect that colours have on human beings. 2______.
If you happen to love brown, you did so, as soon as you opened your eyes, or at least as soon as you could
see clearly.
3______. A yellow room makes most people feel more cheerful and more relaxed than a dark green one;
and a red dress brings warmth and cheer to the saddest winter day. 4______. A black bridge over the Thames
River, near London, used to be the scene of more suicides (自***) than any other bridge in the area-until it was
repainted green. The number of suicide attempts immediately fell sharply. Perhaps it would have fallen even
more if the bridge had been done in pink or baby blue.
5______. It is an established fact that factory workers work better, harder, and have fewer accidents
when their machines are painted orange rather than black or grey.
B. They tell us, among other facts, that we do not choose our favourite colour as grow up-we are born with
our preference.
C. The rooms are painted in different colours as you like.
D. If you do, you must be an optimist, a leader, an active person who enjoys life, people and excitement.
E. Light and bright colours make people not only happier but more active.
F. Life is like a picture or a poem, full of different colours.
G. Colours do influence our moods-there is no doubt about it.
jobs. Some robots do regular jobs. Bobby, the mail carrier, brings mail to a large office building in Washington,
D.C. He is one of 250 mail carriers in the United States.
Mr. Leachim, who weighs two hundred pounds and is six feet tall, has some advantages as a teacher. One
is that he does not forget details. He knows each child"s name, the parents" names and what each child knows
and needs to know. In addition, he knows each child"s pets and hobbies. Mr. Leachim does not make mistakes.
Each child goes and tells him his or her name, then dials an identification (身份证明) number. His computer
brain puts the child"s voice and number together. He identifies the child with no mistakes. Then he starts the
lesson.
Another advantage is that Mr. Leachim is flexible. If the children need more time to do their lessons they
can move switches. In this way they can repeat Mr. Leachim"s lesson over and over again. When the children
do a good job he tells them something interesting about their hobbies. At the end of the lesson the children
switch Mr. Leachim off.
B. robots will take the place of man to rule the earth
C. we can only use robots to do some regular jobs
D. robots can help people in many different ways
B. appearance
C. advantage
D. energy
B. not hard
C. suitable
D. changeable
children"s careers. Should they allow their children to train to become top sports men and women? For many
children it means starting schoolwork very young, and going out with friends and other interests have to take
a second place. It"s very difficult to explain to a young child why he or she has to train five hours a day, even
at the weekend, when most of his or her friends are playing.
Another problem is of course money. In many countries money for training is available from government
for the very best young sportsmen and women. If this help can not be given, it means that it is the parents
who have to find the time and the money to support their child"s development and sports clothes, transport to
competitions, special equipment, etc. Can all be very expensive?
Many parents are worried that it is dangerous to start serious training in a sport at an early age. Some
doctors agree that young muscles may be damaged by training before they are properly developed. Professional
(专业的) trainers, however, believe that it is only by training young that you can reach the top as a successful
sports person. It is clear that very few people do reach the top, and both parents and children should be
prepared for failure even after many years of training.
B. an advertisement
C. a personal diary
D. a newspaper article
B. try to get financial(财政的) support from the government for their children"s training.
C. have to get medical advice from doctors about training methods.
D. prefer their children to be trained as young as possible.
B. Early training may damage your muscles.
C. Most children may become professional sports men after a long period of training.
D. It"s very expensive for parents to support their child"s development in sports.
B. to become less important
C. of all the things, they are the most important
D. to happen again
B. Some people
C. Hardly any people
D. No people
know. You look up every new word in the dictionary. Bad move. All that does slow you down. Even electric
or CD -ROM dictionaries can get in the way of your reading progress. A dictionary is like a road map. It can
help you if you get lost and point you in the right direction. But if you stop to look at the "map" each time you
take a step, you"ll get nowhere fast.
On your English learning "journey", a dictionary can be a helpful "travel companion (伙伴)"-if it is not
overused. To help you start thinking in English, use an English-to-English dictionary. Otherwise, you will
always depend on (依赖) your native language and end up translating in your head.
A good dictionary can help you do more than just find the meaning of a word. It can help you verify (test
and check) spelling, check word forms and grammar usage, find example sentence and learn pronunciation.
Some dictionaries even provide exercises to teach you how to use their resources (资源).
Take time to get to know your dictionary. Learn the pronunciation symbols (符号). Understand what the
abbreviations (缩写字) mean. Try to master the important grammar rules. Look for charts, diagrams and lists
that might be useful in the future. You will discover how helpful it can be to make friends with your dictionary.
And as they say, "A friend in need is a friend indeed."
B. Because it can help us to find the right direction if we get lost.
C. Without it we"ll always depend on our native language and end up translating in our head.
D. Because it can help us to start thinking in English and in Chinese.
B. abbreviations and usage for grammar rules
C. the meaning of a word, spelling and grammar usage
D. charts, diagrams and lists
B. The more you use a dictionary, the faster you may read.
C. The more you use the resources in a dictionary, the more you can benefit (受益) from it.
D. The better a dictionary is, the more expensive it is.
Years ago they knew many things about the moon. They knew how big it was and how far away it was
from the earth. But they wanted to know more about it. They thought the best way was to send men to the
moon.
The moon is about 384,000 kilometers away from the earth. A plane cannot fly to the moon because the
air reaches only 240 kilometres away from the earth. But something can fly even when there is no air. That
is a rocket (火箭).
How does a rocket fly? There is gas in the rocket. When the gas is made very hot inside the rocket, it
will rush out of the end of the rocket, so it can make the rocket fly up into the sky.
Rockets can fly far out into space. Rockets with men in them have been to the moon. Several rockets
without men in them have flown to another planet much farther away than the moon. One day rockets may
be able to go to any place in space.
B. there is no gas in the plane
C. the plane is not strong enough
D. the plane must be driven by a man
B. keeping the men in the rocket warm
C. making the rocket fly up
D. cooking food for the men
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