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 from airplane wings to hundreds of object found in the home. 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（构造）of plastic itself.
Plastic is made of monomers（单体）. These monomers link together to form polymers（聚合物）. Polymers give plastic its ability to be shaped and its strength. The research team found a way to make plastic that contains very small balloons filled with monomer liquid（液体）. When the new plastic cracks（裂开）, 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.
72．Which of the following can be the best title for the article?
A．Ever-Lasting Material Invented.
B．The Chemical Structure of Plastic.
C．Plastic that Repairs Itself.
D．Small Balloons that Makes Plastic Stronger.
73．We know from the passage that the repair is done as .
A．the cracked plastic parts are changed
B．the plastic is made
C．the liquid is put into the plastic cracks
D．the plastic cracks
74．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．the plastic parts in them are easily broken or damaged
C．the new material cannot be used elsewhere
D．they want to experiment in these places first
75．What can we know about the new material mentioned in the passage?
A．It is a kind of liquid that is commonly used.
B．It is more difficult to make than common plastics.
C．Its surface does not crack so easily as other ones.
D．It makes it difficult or impossible to replace plastic objects.
From the earliest times，man has been interested in art．People have often worked together to collect and save the world's art treasures．
Fine art treasures from many countries are kept in an art museum called the Louvre in Paris，France．The works of art have been collected by the people of France over many centuries．
The Louvre has not always been a museum．The first building was a fort（炮台）．In 1190，it was the king's castle with high walls and a round tower．It had a moat to prevent his enemies from walking in ．
Over the years，the number of buildings around the castle grew．By 1350，the castle was no longer needed as a fort．The Louvre became a palace home for French kings and queens．
During times of peace，new treasures were brought in．Du
ring days of war，many treasures were stolen，and the buildings were damaged．
When Francis I became king of France in 1515，he brought in artists from many countries．One of the artists was Leonardo da Vinci from Italy．Da Vinci's"Mona Lisa"is the best known painting in the museum today．
In 1793，the Louvre became a public museum，just as it is now．It is a place where art treasures have been saved for everyone to enjoy．On the whole，this passage is mainly about____.．
| A．an art museum called the Louvre |
B．an Italian artist named Leonardo da Vinci |
C．a king of France named Francis I |
D．the best known painting in Louvre |
Why is it good for great art to be kept in public museums？
| A．It helps people remember who the King of France is． |
B．It keeps people out of the palaces． |
C．It gives everyone a chance to enjoy good art． |
D．It helps people to know who is the greatest artist． |
From the passage we know that _____．
| A．it is not possible for treasures to be stolen |
B．old forts always make the best museums |
C．great art should be shared with all the people |
D．king Francis I of France brought in artists from an old fort |
In the third paragraph the word"moat"probably means_____．
| A．a high tower built in former times where soldiers watched out for enemies |
B．a long and deep ditch（沟） dug round a castle and was usually filled with water |
C．a cart pulled by horses on which soldiers fought |
D．a long and high wall around castle |
Jean Driscoll can go faster in her wheelchair than the world’s best marathoners(马拉松运动员) can run!
In April, Jean finished the Boston Marathon in 1 hour 34 minutes 22 seconds. That’s about 33 minutes faster than the winning male runner! She competed on the track, too. She was se
cond in the 800 meter wheelchair race at the 1992 Olympics.
Jean doesn’t like to be told she’s brave. “I’m in sports because I’m a competitive person!” Jean was born with spina befida(脊柱裂), a birth illness that damages the spine（脊椎）. She began to use a wheelchair to get around in high school. Then she tried wheelchair race and was amazed.” Players crashed into each other and fell out of their chairs,” she says, “It was fun.”
Jean tried other wheelchair sports. At the University of Illinois, her wheelchair basketball team won two national titles.
Now Jean coaches and teaches. She tries to get people to set goals. “When I sign my autograph（亲笔签名）,says Jean, “I write, dream big and work hard.”What made Jean take part in sports?
| A．She was brave. |
| B．She was competitive. |
| C．She was strong. |
| D．She was disabled. |
What kind of education did she receive?
| A．High school. |
B．Junior middle sch ool. |
| C．High education. |
| D．Primary school. |
What is Jean’s advice on how to succeed?
| A．Work hard. | B．Hope for the best. |
| C．Dream a lot. | D．Have great wishes and work h ard. |
Some disabled people use a special card when they park their cars. These are called disabled placards, which are removable signs that can be hung from the rear-view(后视) mirror of a car. These placards are only supposed to be for disabled people.
These placards are meant to help disabled people in a number of ways. They allow the person to park in special parking spaces. They can also be used when disabled people are being dropped off or picked up. Disabled people can even use them to park without having to pay.
Parking officials think that some people are cheating. Not all people who have these placards are disabled. Today, one in sixteen drivers in California carries the sign. There are a lot more people who have disabled placards today than ten years ago. An official from the DMV(加州车辆管理局) says that there are many reasons for the increase. As people get older, they may develop health problems and need to have one. There are also other reasons why more drivers have them today. Finally, there are a number of people who have them that should not.
Last year the DMV cancelled more than 25,000 permits. They found that lots of people who had the disabled placards had died. These permits are no longer valid.
Some people are worried that the system is being abused. They are worried that access to the program could be limited because of the misuse. More rules could make it harder for people with real disabilities to get these placards.What do we know about placards?
| A．They are all used by disabled people. |
| B．They are cards designed by disabled people. |
| C．They can help disabled people park their cars. |
| D．They allow disabled people to drive anywhere. |
The DMV canceled many permits because_________.
| A．the number of old people is growing |
| B．the number of disabled people is on the rise |
| C．they want to make it harder for people to get them |
| D．some people who have the placards have died |
What can people do with the placards?
| A．Drivers can use them when picking up disabled people |
| B．Disabled people can pay for parking with them. |
| C．Drivers can use them to drive their cars. |
| D．People can have access to DMV with them. |
What does the third paragraph mainly talk about?
| A．The reasons why disabled placards are also popular among drivers. |
| B．Some healthy people also use the disabled placards. |
| C．The number of disabled placard users had increased. |
| D．More reasons for drivers to use disabled placards. |
We learn from the passage that_________.
| A．disabled placards will be stopped by the government |
| B．some people will be punished for breaking the law |
| C．some disabled people will be forbidden to use disabled placards |
| D．some rules will be made related to disabled placards |
TAIBEI － Increasing numbers of Taiwanese students are joining the island’s “China rush”, seeking education on the Chinese mainland．
According to official Chinese figures, the number of Taiwanese students admitted into college and postgraduate（研究生）programs on the mainland totaled 461 in 1996, 928 in 1997 and 839 in 1998．Although no latest official numbers were available,” Netbig.Com said this number had risen between 30 to 50 percent annually in the past two years with well over 1000 entering mainland campuses last year.
The Internet site, based in the Chinese city of Shenzhen, provides education service and information on Chinese mainland college and universities. “Many Taiwanese believe a Chinese education giving more knowledge about the people and culture in the mainland will increase their
chances in the Chinese job market, Net. Com vice-president Ingrid Huang said．“I believe it will give me hands-on experience in the business field in the Chinese mainland and a better understanding of the Chinese mainland people,” said Lydia Chang, a 19-year-old majoring in journalism at Shih Shin University. Chang plans to go on to get a master’s degree in business administration in Shanghai, which she says offers the best environment for such studies.
A journalism graduate student, surnamed Lin, at the National Taiwan University said he would like to study law on the Chinese mainland since “there will be better career prospects now that more Taiwanese companies are going there”. “They hope the children could build up connections which could later become useful in their business operations,” said Yang Ching-yao, professor of the Chinese mainland studies. A Netbig.Com survey showed the campuses favored by Taiwan students included Beijing, Qinghua and Renmin universities in Beijing, and Jinan and Zhongshan universities in Guangzhou. The most popular studies were law, business and Chinese medicine.
At present, Chinese Taibei doesn’t recognize diplomas earned in the Chinese mainland nor help with any inquiries about studying there. But recognizing the trend, education authorities are giving a final form to a policy accepting certificates（证书）from selected universities.More Taiwanese students study on the Chinese mainland because ___________.
| A．Taiwan will reunite with the mainland sooner or later |
| B．the fees asked for are lower than those of Taiwan |
| C．what they have learned on the mainland will bring them a bright future |
| D．there are many famous universities for them to choose |
Some business executives were sending their children to study in the Chinese mainland so that their children ___________.
| A．could receive better education | B．could learn more about the policy there |
C．could do well in the business operations |
D．could make more fr iends there |
The underlined word “it” in the third paragraph refers to __________.
| A．Netbig.Com | B．a Chinese education on the mainland |
| C．the Chinese job market | D．the university |
The author wrote the article to tell us ______________.
| A．more Taiwanese students are studying on the mainland |
| B．the number of Taiwanese students going to universities on the mainland had been increasing year after year |
| C．education on the mainland is more attractive compared with that of Taiwan |
| D．Taiwan and the mainland should cooperate with each other in every field. |
Which is true according to the passage?
| A．Chinese Taibei recognizes diplomas earned on the Chinese mainland |
| B．The number of Taiwanese students going to study on the mainland will surely be increasing in the next few years. |
| C．Chinese Taibei doesn’t help with any inquiries about Taiwanese studying in the mainland |
| D．Education of Taiwan is far behind the mainland. |
Many people who work in London prefer to live outside it, and to go in to their offices or schools every day by train, car or bus, even though this means they have to get up early in the morning and reach home late in the evening.
One advantage of living outside London is that houses are cheaper. Even a small flat in London without a garden costs quite a lot to rent. With the same money, one can get a little house in the country with a garden of one’s own.
Then, in the country one can rest from the noise and hurry of the town. Even though one has to get up earlier and spend more time in trains or buses, one can sleep better at night and during weekends and on summer evenings, one can enjoy the fresh, clean air of the country. If one likes gardens, one can spend one’s free time digging, planting, watering and doing the hundred and one other jobs which are needed in a garden. Then, when the flowers and vegetables come up, one has the reward of one who has shared the secret of Nature.
Some people, however, take no interest in country things: for them, happiness lies in the town, with its cinemas and theatres, beautiful shops and busy streets, dance-halls and restaurants. Such people would feel that their life was not worth living if they had to live it outside London. An occasional walk in one of the parks and a fortnight’s (two weeks) visit to the sea every summer is all the country they want: the rest they are quite prepared to leave to those who are glad to get away from London every night. Which of the following statements is NOT true?
| A．People who like country things prefer to live outside the city. |
| B．People who work in London prefer to live in the country. |
| C．Because of certain disadvantages of living outside London, some people who work in London prefer to live inside London. |
| D．Because of certain advantages of living outside London, many people who work in London prefer to live outside London. |
One can use the same money for ________ to buy a little house with a garden in the country.
| A．getting a small flat with a garden | B．having a small flat with a garden |
| C．renting a small flat without a garden | D．buying a small flat without a garden |
When the flowers and vegetables in the garden come up, those _______ have the reward of one who has shared the secret of Nature.
| A．who live in the country |
| B．who have spent time working in the garden |
| C．who have a garden of their own |
| D．who have been digging, planting and watering |
People who think happiness lies in the town would feel that _______ if they had to live it outside London.
| A．their life was meaningless | B．their life was invaluable |
| C．they didn’t deserve a happy life | D．they were not worthy of their happy life |
The underlined word “rest” in the last para
graph refers to ________.
| A．the rest time | B．the rest people |
| C．the rest of the country | D．the rest of the parks and of the sea |