Electrical devices could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking. Britis 题目和参考答案——青夏教育精英家教网—

题目内容

Electrical devices (仪器) could soon use power made by human energy. Scientists say they have developed an experimental device that produces electricity from the physical movement of a person walking. British scientist Max Donelan and other scientists in Canada and the United States developed the device.

The device connects to a person's knee. As the person walks, the device captures energy each time the person slows down. To do this, the device helps with the slowing down movement of the leg. The movements of the walking person push parts of a small machine that produces electricity. Using the device, an adult walking quickly could produce thirteen watts of electricity in just a minute. Donelan says walking at that speed could produce enough power to operate a laptop computer for six minutes.

There are several possible uses for the device. Developers say it could help people who work in areas without electricity to operate small computers. The device could also be used in hospitals to operate heart pacemakers (起搏器). It could even be used to assist in the movement of robotic arms and legs.

The experimental version of the device weighs about one and a half kilograms, but it is too costly for most people to buy. But the researchers hope to make a lighter, less costly version. An improved version should be ready in one year.

The developers hope the device will one day help developing countries. Nearly twenty-five percent of people around the world live without electric power.

A similar product was invented in 2005 by Larry Rome of the University of Pennsylvania. He created a bag carried on a person's back that also produces power from walking. The knee device does not produce as much electricity as the bag. But the bag requires the walker to carry a load of twenty to thirty kilograms.

1.The second paragraph mainly talks about ________.

A. who developed the device

B. how the device works

C. several possible uses for the devices

D. how much electricity the device can produce

2.What is the disadvantage of the experimental version of the device?

A. It is too heavy for the walker to bear.

B. It is too complex for people to use.

C. It will slow down one's walking speed.

D. It is too expensive for most people to afford.

3.Compared with the device designed by Larry Rome, this new device ________.

A. produces power without adding more loads to the walker

B. can produce more power in a much shorter time

C. needs to be equipped with a battery

D. can help the walker walk faster

4.From the passage, we can learn that the electrical device can ________.

A. help housewives operate the micro-wave oven

B. make it much easier for us to go online

C. produce more electricity than that invented by Larry Rome

D. be applied in medicine to operate heart pacemakers

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相关题目

文中共有10处语言错误，错误涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词作斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词； 2.只允许修改10处，多者（从第11处起）不计分。

My father speaks very well English, but he knows little Japanese. He went to Tokyo in November 11 for a meeting. The meeting over a week later. The next morning he went to a park and then do some shopping. At noon, he was very much hungry. He went to nearest restaurant and sat down at a table. A man came up to him and asked that he needed. He said he liked noodles, chicken and some fishes. He spoke to the man in English ，and the man couldn't understand him. My father had to write some Chinese words for the food and got them.

As you can see, the number of cars on our roads ________ rising these days.

A．was keepingB．keepC．keepsD．were keeping

I am fond __1._my sister but she has one serious shortcoming. She can be really stubborn. I still remember what happened last month. Although she didn’t know _2.__ best way of getting to some places, she insisted on _3.__(organize) a trip. I kept asking her when we were leaving, _4.__ we were coming back, and whether she had looked at a map. To my questions, she gave no answer. Instead, she gave me a _5._(determine) look—which said she would not change __6.__mind. When I told her that our journey would begin at an altitude of more than 5,000 __7.__(meter), she seemed to be excited. When I told her the air would be hard __8._(breathe) and it would be very cold, she said it would be a __9._(delight) experience. I know my sister __10.__(good) than anyone else. Once she has made up her mind, nothing can change it.

知识点运用

1.We are in complete __________ (ignore) of your plans.

2.There is __________ (dusk) light inside the cave.

3.There are __________ (add) charges.

4.What did he __________ (actual) say?

5.__________ (base), my knowledge of physics is pretty limited.

6.Over the past 12 years, American and Chinese leaders have met __________ (frequent) to discuss a whole host of issues.

7.He's involved in the __________ (organize) of a new club.

8.Those are __________ (wool) blankets.

9.His father is a leader with courage and __________ (determine).

10.The President was leaving for a four-day __________ (office) visit to China.

11.That's an __________ (entire) different matter.

12.After his __________ (recover) from his illness, he continued his work again.

13.Children all enjoy themselves __________ (outdoor).

14.I felt sick because that fish __________ (agree) with me.

15.How __________ (rely) are the local weather forecasts?

16.__________ __________ (加起来) your scores and see how many points you can get.

17.The boy broke Jack’s window __________ __________ (故意). He wanted to frighten Jack.

18.__________ __________ (和往常一样), she is the first to come to the class.

19.She has __________ __________ __________（担心） her daughter __________ __________ (自从) she heard that she dropped out of school.

20.The country has __________ __________ (经历) too many wars.

21.和睦相处可以建立你们之间的良好关系。

You can build up good relationship by __________ __________ well with each other.

22.事实上，父母亲的态度对我作出这样的决定起着重要的作用。

As a matter of fact, my parents’ attitude __________ __________ __________ __________ in my making such a decision.

23.我们必须充分利用时间来学习。

We must __________ __________ __________ __________ our time to study.

24.他很顽固，他一旦下定决心做某些事情，什么都改变不了。

He is very stubborn and once he __________ __________ __________ __________ __________ to do something, nothing can change it.

25.曾经有段时间我非常厌倦学习。

__________ __________ __________ __________ __________ I got __________ __________ study.

26.昨晚我妈妈直到半夜才睡觉。

__________ __________ __________ __________ midnight __________ my mother went to bed last night.

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符合(^)，并在其下面写出该加的词。

删除：把多余的词用斜线(\)划掉。

修改：在错的词下划—横线，并在该词下面写出修改正后的词。

注意：1. 每处错误及其修改均仅限一词；

2. 只允许修改10处，多者（从第11处起）不计分。

I have many friends, and I have only one good friend. Her name is Zhou Fang. Fang is my closed friend in our school. After class, we always take walk in the garden and talk about a lot of thing. We talk to the topic in the newspaper, some difficulty math problems and so on. Fang can even be my teacher because of she often offers me good advice. We are very happy when they get together. Friendship helps me grow and enjoying my life. We all need friends because friendship are wealth.

A great French writer says that we should help everyone as much as possible because we often need help ourselves. The small even can help the great. Then he tells a simple story. An ant is drinking at a small stream and falls in. She tries to reach the side but makes no progress at all. The poor ant, almost exhausted, is still doing her best when a bird sees her. Moved with pity the bird throws a blade of grass into the water. It supports(支撑) the ant like a boat, and the ant reaches the bank. When she is having a rest in the grass, she sees a man walking along barefooted and carrying a gun in his hand. He wants to kill the bird nearby. When he raises his gun to fire, the ant bites him in the foot. So he stops to look down and the bird flies away quickly. It is an animal much weaker and smaller than herself that has saved her life.

1.According to the French writer, we often need help from others, so we should ________.

A. not help others

B. help those who may be helpful to us

C. get as much help as we can

D. help others as much as possible

2.The ant finally got on the bank ________.

A. when the water pushed her

B. with the help of a piece of wood

C. with the help of a piece of grass

D. when the bird reached out a leg for it

3.The French writer tells the story in order to show ________.

A. how an ant saved a bird

B. how brave the ant was

C. how clever the ant was

D. even the small can help the great

4.Though the poor ant was too tired, she ________.

A. lost hopeB. stopped trying

C. stopped to restD. didn’t give up

People born in winter are more likely to suffer mental health disorders, according to a recent study carried out by researchers at Vanderbilt University in Tennessee.

Researchers raised baby mice from birth to weaning (断奶) in either “summer” light cycles of 16 hours of light and 8 hours of dark or “winter” cycles of 8 hours of light and 16 hours of dark. A third group experienced 12 hours of light and 12 hours of dark a day.

Then half the winter mice stayed in a winter cycle, while half switched to a summer schedule. The summer mice were similarly split. The mice raised in equal periods of light and dark were split into three groups, one of which stayed on the 12?hour schedule, one of which joined the winter group, and one of which joined the summer group.

After 28 days, it turns out the summer?born mice behaved the same whether they stayed on the summer cycle or switched to winter. But among the winter?born mice, those stayed in winter kept their previous schedule, while those that switched to summer stayed active for an extra hour and a half, which indicates that mice born and weaned in a winter light cycle showed dramatic disruptions（破坏） in their biological clocks.

The finding is the first of its kind in mammals, and it could explain why people born in winter are at higher risk for mental health disorders.

“We know that the biological clock regulates(管理) mood in humans,” said study researcher McMahon. “If the mechanism (机制) similar to the one that we found in mice operates in humans, then it could not only have an effect on a number of behavioral disorders, but also have a more general effect on personality.”

1. How many groups of mice are there finally in all in the experiment?

A．Four. B．Five. C．Six. D．Seven.

2.What's the main idea of the text?

A．The biological clock regulates mood in humans.

B．People born in winter are at higher risk for physical health disorders.

C．Being born in winter has a negative effect on people's mental health.

D．The length of light will influence the behavior of the mice.

3. The underlined word “split”(Paragraph 3) can be replaced by ________.

A．divided B．torn C．hit D．ended

4.Who is probably the reader of the passage?

A．A job?hunter.

B．A student in the university.

C．A newly?married couple.

D．An experienced dentist.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

How to pick a good book

It is not news that we spend more time texting（发短信） and surfing online than ever. But a recent study shows that more teenagers are reading good old-fashioned and ink-on-paper books. Reading is a good way to widen your knowledge and learn about yourself. You probably know how to find the best application programs for your phone. 1.

1. Start with your interests.

Reading on your own isn’t like reading for school. 2. This could be ancient martial arts, readings in computers, or fashion design books. If you can name the subject, you can find books about it.

2. Find your “type”

3. Books of fiction, like novels or short-story collections, can transport you to another world or help you to imagine something beyond your own experience. Not all fiction is the same. Try some different types of fiction and see which one you prefer. Non-fiction books give you the “who”, “what”, “when” and “why” of something. They tell stories suing facts, but that doesn’t mean they are dull.

3. Read the “blurb(简介)”

The reviews and quotes on the back and inside covers of many books are known as “blurbs”. These comments not only give you an idea of what the book is about, but also help you to pick out future books. If you find a book you really like, take a minute to read the blurb and see which authors praised the book. 4.

4. 5.

Your local library can provide you with a lot of great books. Explain your interests and mention any writers you like, and the librarian can point you towards books that you will like.

Finally, you’ll probably enjoy what you’re reading if you find a quiet place and make time for the book.

A. Ask an expert

B. Read in a quiet place

C. Do you prefer fiction or non-fiction?

D. You can pick something that suits your interests.

E. But do you know how to pick a book that you will really like?

F. It is necessary to work out what the book is mainly about before reading.

G. Often, they will have similar styles, and you might find you like books by those authors, too.

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