American scientists have developed the first material that repairs itself. The material is a form of plastic that has been engineered to fill breaks in its surface.
Plastics are used today in everything. Scientists wanted to find a way to make objects made of plastic last longer. The researchers hope their new discovery can be used to make objects that are difficult or impossible to replace.
The surface of plastic objects breaks over time. Very small breaks develop every time a plastic object is used. The researchers wanted to find out how to stop plastic from developing small breaks that weaken and destroy it. They found the answer in the chemical structure of plastic itself. The research team found a way to make plastic that contains very small balloons filled with monomer(单体) liquid. When the new plastic cracks, the monomer liquid is let out and flows into the crack. Thus the break is repaired. The repaired plastic has seventy-five percent of the strength of undamaged plastic.
The new self-repairing plastic is not yet ready for production. But it has several possible uses. One could be in space vehicles where parts cannot be repaired or replaced. Another possible use might be in bridges. And it could be used in people, to replace bone joints that have become broken or damaged.The passage mainly talks about_______ .
| A．plastic that repairs itself |
| B．the chemical structure of plastic |
| C．permanent material invented |
| D．small balloons that makes plastic stronger |
We know from the passage that the repair is done as_______.
| A．the cracked plastic parts are changed |
| B．the plastic cracks |
| C．the liquid is put into the plastic cracks |
| D．the plastic is made |
The scientist are planning to use the new material in space vehicles, bridges and people because________.
| A．the plastic parts in them are required to last longer |
| B．they want to experiment in these places first |
| C．the new material cannot be used elsewhere |
| D．the plastic parts in them are easily broken or damaged |
America is a mobile society. Friendships between Americans can be close and real, yet disappear soon if situations change. Neither side feels hurt by this. Both may exchange Christmas greetings for a year or two, perhaps a few letters for a while — then no more. If the same two people meet again by chance, even years later, they pick up the friendship. This can be quite difficult for us Chinese to understand, because friendships between us flower more slowly but then may become lifelong feelings, extending sometimes deeply into both families.
ericans are ready to receive us foreigners at their homes, share their holidays, and their home life. They will enjoy welcoming us and be pleased if we accept their hospitality (好客) easily. Another difficult point for us Chinese to understand Americans is that although they include us warmly in their personal everyday lives, they don’t show their politeness to us if it requires a great deal of time. This is usually the opposite of the practice in our country where we may be generous with our time. Sometimes, we, as hosts, will appear at airports even in the middle of the night to meet a friend. We may take days off to act as guides to our foreign friends. The Americans, however, express their welcome usually at homes, but truly can not manage the time to do a great deal with a visitor outside their daily routine. They will probably expect us to get ourselves from the airport to our own hotel by bus. And they expect that we will phone them from there. Once we arrive at their homes, the welcome will be full, warm and real. We will find ourselves treated hospitably.
For the Americans, it is often considered more friendly to invite a friend to their homes than to go to restaurants, except for purely business matters. So accept their hospitality at home. In which part of a newspaper can this article be found?
| A．Culture. | B．News. | C．Story. | D．Travel. |
Which of the following statements is TRUE according to the passage?
| A．Friendships between Americans usually extend deeply into their families. |
| B．Friendships between Americans usually last for all their lives. |
| C．Americans always show their warmth even if they are very busy. |
| D．Americans will continue their friendships again even after a long break. |
The underlined words “flower”(in Line 5) probably means ___________.
| A．weaken | B．develop | C．stretch | D．disappear |
From the last two paragraphs we can learn that when we arrive in America to visit an American friend, we will probably be___________.
| A．treated hospitably at his home | B．offered a ride to his home |
| C． warmly welcomed at the airport | D．treated to dinner in a restaurant |
The writer mainly talks about ___________ in the text.
| A．friendships between Chinese | B．Americans’ hospitality |
| C．different views of friendship | D．friendships between Americans |
Ammie Reddick from East Kilbride, Lanarkshire, was only 18 months old when she had the accident that had scarred（留下创伤） her for life. The curious child reached up to grab the wire of a hot kettle in the family kitchen and poured boiling water over her tiny infant frame.
Her mother Ruby turned round and, seeing Ammie horribly burnt, called an ambulance which rushed her daughter to a nearby hospital. Twenty percent of Ammie’s body had been burned and all of her burns were third-degree. There, using tissue taken from unburned areas of Ammie’s body, doctors performed complex skin transplants to close her wounds and control her injuries, an operation that took about six hours. Over the next 16 years, Ammie underwent 12 more operations to repair her body.
When she started school at Maxwelton Primary at age 4, other pupils made cruel comments or simply wouldn’t play with her. “I was the only burned child in the street, the class and the school,” she recalled, “some children refused to become friends because of that.”
Today, aged 17, Ammie can only ever remember being a burned person with scars; pain is a permanent part of her body. She still has to have two further skin transplants. Yet she is a confident, outgoing teenager who offers inspiration and hope to other young burns victims.
She is a member of the Scottish Burned Children’s Club, a charity set up last year. This month, Ammie will be joining the younger children at the Graffham Water Center in Cambridgeshire for the charity’s first summer camp. “I’ll show them how to get rid of unkind stares from others,” she says. Ammie loves wearing fashionable sleeveless tops, and she plans to show the youngsters at the summer camp that they can too. “I do not go to great lengths to hide my burns scars,” she says, “I gave up wondering how other people would react years ago.”How many operations has Ammie already had?
| A．Twelve | B．Thirteen | C．fourteen | D．Fifteen |
What did other children do when Ammie first went to school?
| A．They were friendly to her. | B．They showed sympathy to her. |
| C．They were afraid of her. | D．They looked down upon her. |
Ammie will teach the younger children at the Graffham Water Center to___________.
| A．face others’ unkindness bravely | B．hide their scars by proper dressing |
| C．live a normal life | D．recover quickly |
Which of the following words can’t properly describe Ammie?
| A．Courageous | B．Confident | C．sensitive | D．Outgoing |
What can be the best title of the passage?
| A．A Seriously Burned Girl Survives | B．Ways to Get Rid of Unkind Stares |
| C．Permanent Scars And Pain For a Girl | D．A seriously burned angel of Hope |
For many years, artists have flocked to Paris, France, to paint or to learn to paint. Perhaps artists first went there because of the city′s beauty. They went to paint pictures of the broad, tree-lined streets, the great churches, and the graceful river bridges.
The artists felt comfortable in Paris because the people of the city had always enjoyed art. Paris had great art museums, filled with famous paintings and statues(雕像)from many countries. And the people of Paris had always welcomed new ideas. In this city, artists felt free to experiment with new ways of painting.
As soon as famous artists painted in Paris, students came to learn from them. People came to buy paintings. People called art dealers set up galleries where paintings were bought and sold. Others kept shops that sold artists′ paints and supplies.
Students and artists who were not yet famous could live in Paris for very little money. They learned by studying great art in the museums, and they learned from one another. They held art fairs, hanging their paintings outdoors along the streets.
Today, New York City and Florence, Italy, are also famous art centers. But the world’s main art exhibits are still held in Paris. Important judges of art live there. Most of the new ways of painting that have started in the last hundred years began in Paris. So artists and art dealers still go to Paris because it is the world′s leading art center.In Pairs artists can make progress in art by doing lots of things except .
| A．painting the beautiful scenes of Pairs. |
| B．visiting museums, churches and fairs. |
| C．trying out their new ideas in the way of painting. |
| D．buying or selling paintings in the fair. |
The story does not say so, but it makes you think that.
| A．Paris is famous for its artists’ paints and supplies |
| B．there is more than one way to paint |
| C．art fairs are held in galleries |
| D．Florence is the center of world art exhibits |
Which of the following statement is not a reason why so many artists prefer to stay in Pairs?
| A．Pairs is a beautiful city |
| B．The French are willing to accept any new things. |
| C．All the museums are free of charge in Pairs. |
| D．Artists can make an easier life in Pairs. |
On the whole, this story is about.
| A．the world′s most famous art center |
| B．how to buy a painting in Paris |
| C．the famous art centers of New York and Florence |
| D．where to set up galleries |
As children grow up, they become curious about different kinds of things. When they are babies, they are interested in the parts of their bodies and in the smiles of their mothers. The they become interested in the physical world around them: the plants, the
animals, the sky. Later, they become interested in the things that people have made: wheels, bicycles, cars. And when they are adults, their curiosity continues. Sometimes this curiosity leads to a career (生涯、职业) in science.
Scientists spend their lives trying to find out about the world. Those who work with the earth sciences study the earth, the oceans, and the skies. Other scientists who study living things work with the biological sciences. A third group of scientists study the physical sciences, e. g. physics, chemistry .
These scientists have already discovered a lot about our world. For example, they tell us why your heart beats fast when you run. They say that when you are quiet, your heart normally beats sixty-five or seventy-five times a minute. Your heart is a pump (泵) that pumps blood to all parts of the body. The blood carries oxygen and nutrition. When you run, your muscles work very hard and use the nutrition that the blood carries to them. The muscles need oxygen, too . So your brain sends a signal to the heart. The signal means that the muscles need more nutrition and oxygen. Then the heart beats fast and sends blood quickly to the muscles. It may beat 90 to 140 times a minute.
Of course, scientists cannot answer all of our questions. If we ask, “Why does the ocean water taste salty?”
Scientists will say that the salt comes from rocks. When a rock gets very hot or very cold, it cracks. Rain falls into cracks. The rain then carries the salt into the earth and into the rivers. The rivers carry the salt into the ocean. But then we ask , “What happens to the salt in the ocean? The ocean does not get saltier every year.” Scientists are not sure about the answer to this question.
We know a lot about our world, but there are still many answers that we do not have, and we are curious. According to the passage, which of the following statements is true?
| A．People are curious in the same way. |
| B．People in different countries are interested in different things. |
| C．Men and women are curious about different things. |
| D．People of different ages are interested in different things |
Scientists who work with the biological sciences study____.
| A．the earth , the oceans and the sky |
| B．man-made things |
| C．plants and animals |
| D．ocean water |
When you run, your muscles need ____.
| A．more nutrition and oxygen | B．more signals | C．more salt | D．water |
To me, life without music would not be exciting. I realize that this is not true for everybody. Many people get along quite well without going to the concert, and listening to the record. But music plays an important part in everyone's life, whether he realizes it or not. Try to imagine, for example, what films or TV plays would be like without music. Would the feelings, the moving plot, and the greatest interests, be so exciting or dramatic? I'm not sure about it.
Now, we have been speaking of music in its more common meaning----the kind of music we hear in the concert hall. But if we look at some parts of music more closely, we discover them in our everyday life too----in the rhythm of the sea, the melody of a bird in the woods and so on. So music surely has meaning for everyone, in some way or other. And, of course, it has special meaning for those who have spent all their lives working on playing or writing music.
It is well said, “Through music a child enters into a world of beauty, expresses himself from his heart, feels the joy of doing things alone, learns to take care of others, develops his mind and makes his body strong.”What dose the writer say more about in the text?
| A．Life full of music. |
| B．Life without music. |
| C．The importance of music. |
| D．The development of music. |
From the text, we learn that many people________.
| A．don't realize the importance of music |
| B．get along quite well without music |
| C．go to the concert instead of enjoying music |
| D．think music would be less exciting than films |
What does the underlined word “melody” mean in the text?
| A．flying | B．looking | C．singing | D．living |
From the last paragraph, we learn that music________.
| A．is very important, especially for children |
| B．is very necessary for our everyday life |
| C．can make our life exciting and dramatic |
| D．can enter into another beautiful world |
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