American researchers say drinking tea may help strengthen the body’s defense system against infection ．Doctors at Brigham and Women’s Hospital in Boston.Massachusetts.did the study．The team studie 题目和参考答案——青夏教育精英家教网—

题目内容

American researchers say drinking tea may help strengthen the body’s defense system against infection (感染)．Doctors at Brigham and Women’s Hospital in Boston，Massachusetts，did the study．The team studied a chemical found in black，green，oolong and pekoe tea This chemical is an amino acid (氨基酸) called L-theanine．The scientists say it may increase the strength of Gamma delta T cells，which are part of the body’s defenses．

First，the researchers mixed some of these cells with antigens (抗原) found in the amino acid Antigens help the body react to infection．Then the scientists added some bacteria (细菌) ．

Within twenty-four hours，the cells produced a lot of interferon，a substance that fights infection Cells not mixed with the antigens did not produce interferon．

In the second part of the study，eleven people drank five to six cups of black tea every day．Ten other people drank the same amount of instant coffee．That is dried coffee mixed with hot water．

Two weeks later，and again two weeks after that，the researchers tested the blood of all twenty-one people．They also looked at what happened when they added bacteria to the blood cells．They found that the tea drinkers produced five times more interferon after they started drinking tea The coffee drinkers did not produce interferon．

Doctor Jack Bukowski led the study He says the antigens added to the Gamma delta T cells were responsible for the increased reaction to the bacteria．He says the study also showed that the cells were able to remember the bacteria and fight them again the next time．

Earlier research already has found that tea can help prevent heart disease and cancer Doctor Bukowski says the new study must be repeated with more people．If the findings prove to be true，he says，then tea drinking might also help protect against bacterial infections．He says the amino acid L-theanine could be removed from tea and used as a drug to strengthen the body’s defenses．

72．We may know from the text that can be found in different kinds of tea．

A．Gamma delta T cells B．L-theanine C．interferon D．bacteria

73．Tea may help strengthen the body’s defense system because it helps ．

A．the body to produce more interferon

B．the body to produce more Gamma delta T cells

C．to add some bacteria to the blood cells

D．to mix antigens with some of the cells in the body

74．According to Dr Bukowski，．

A．the findings of the study have already proved to be true

B．he bas taken some amino acid L-theanine from tea and made a drug with it

C．further study is needed to prove the findings true

D．he is not sure whether tea can help prevent heart disease and cancer

75．What would be the best title for this text?

A．Tea Is Better Than Coffee．

B．Tea May Help Fight Infection．

C．Tea Can Help Prevent Cancer．

D．Our Body Needs Tea．

72-75 BACB

练习册系列答案

1.What is the best title of the passage?（Please answer within 10 words.）?

___________________________?

2.What is the idea of American education??

___________________________

3.Can you tell us the differences between American education and Chinese education?（Please answer it within 30 words.）?

___________________________

4.Please translate the underlined sentence into Chinese.?

___________________________?

5.Do you think American education is fit for Chinese students?Why?（Please answer it within 40 words.）?

___________________________?

短文填词（共10小题，每小题1分，满分10分）

阅读下面的短文，用三种形式完成短文，使文章语义完整，连贯。（①根据上下文填空；②用所给单词的正确形式填空；③根据单词所给首字母填空。每空一词。）请将答案写在右边对应题号的横线上。

Dear Christie，

I’m here in the National Park, in （southeast）California. 72.

I have been t around the state of California for three weeks 73.

now, It's very different from I have seen in American movies. 74.

Not everyone is rich and not everyone l near the beach. I first 75.

travelled southeast rich farmland then to the central part. 76.

They grow e here including cotton，vegetables，nuts and 77.

fruit．They raise cattle too．Then I traveled （far）southeast into 78.

mountains and desert. Californians are very friendly, they are 79.

from many different r and cultures. Every cuIture has its own 80. ，

music，food and art. I show great interest in them． 81.

Wish you were here. Give my love to Paula.

Yours，

George

I am so worried about global warming. We need stop cutting down all of the trees so that they can absorb the carbon dioxide. I think the Kyoto Protocol （京都议定书） to stop pollution is a great idea ,and I hope our country will decide to follow it, too.

— Eli S.,10,Texa

People should do all they can to help stop pollution, even if it is something as little as recycling your soda can. Every little thing helps. Maybe schools can put recycling bins in classrooms. Students can bring in all of their cans and bottles and see how many the school can collect.

— Lindsey A.,11, Massachusett

The United States should take action to help stop pollution. Since we are one of the richest countries, we should at least spend a little money to help.

— Aaron z,11,Massachusett

It is not good that the United States is not following the Kyoto Protocol. The U.S. is one of the most pollution emitting （污染物排放）countries in the world. Even if the rest of the world agrees to follow those rules, without the U. S. and its big businesses agreeing, global warming will still be a big problem.

—Augustine S.,11,Ohio

The world needs to learn more about global warming problems. If we do not do something soon then some of Earth’s coolest animals will become extinct. People should use solar power instead of things that pollute the atmosphere!

— Jillian J.,10,Pennsylvania

Global warming is very dangerous, and it must be prevented. Even if people think that it cannot be stopped ,we should at least try. Stopping global warming is more important than keeping our businesses going. What about the penguins（企鹅）and the polar bears? We can’t just let them become extinct.

—Samantha R.,11,Illinois

72．Why does Lindsey suggest schools put recycling bins in classrooms?

A．To keep the classroom clean B. To help protect wild animals.

C．To help protect our earth. D. To collect waste in classroom.

73．Augustine worries that global warming problems will be difficult to solve because .

A．many people think that global warming cannot be stopped

B．more and more trees are being cut down

C．American government spends little money stopping pollution

D．the U.S. refuses to follow the Kyoto Protocol

74．Jillian and Samantha believe that .

A．solar power is earth-friendly energy

B．global warming threatens animals’ survival

C．America is the richest country in the world

D．the penguins and the polar bears are dying out

75．What do the six children mainly talk about?

A．Environmental problems. B．The Kyoto Protocol.

C．Animal protection. D．The climate change.

Shopping in the United States changes a lot．About ninety years ago most people shopped in small stores that were owned by one person or a family．Women went from the bakery to the butcher’s to the grocer and on to the fruit and vegetable seller in order to get their food for the week．Then, about sixty years ago, supermarkets were born．In a supermarket, people could get all the different kinds of food they needed without going to different stores．

The next big change in shopping in the United States was the shopping mall．A shopping mall is a group of stores under one roof．Because malls allowed people to shop without worrying about the weather, they soon became very popular．The mall became a place for people to socialize in addition to shopping．If you walk through a mall, you will see older people sitting, chatting and drinking coffee．Malls are places for teenagers to hang out．Many teens will often just “go to the mall” and spend time with their friends．

The recent change in American shopping was the superstore．Large chain stores such as Wal-Mart, Office Depot and Toys “R” Us have been built all across the United States．Because they are so large, they can buy goods at a great discount and sell them much cheaper than smaller stores．Sometimes, when they are built near small towns, many of the small town stores have to close．They just cannot compete with their giant neighbors．

And now, online shopping is becoming more and more popular all over the States．People are too busy to go to the physical stores, so they go shopping over the Internet．Online shopping has lots of advantages．For instance, online stores are usually available 24 hours a day．Searching or browsing online shops can be faster than browsing the physical stores．While, online shopping also has its disadvantages．People are at higher risk of being cheated on the part of the merchant than in a physical store．And privacy of personal information may be let out．

1.Which of the following shows the right order of shopping development in the United States?

①small stores ②superstores ③shopping malls ④shopping online ⑤supermarkets

A．①②③④⑤ B．①⑤③②④ C．②③④①⑤ D．①⑤②③④

2.Which is the place for people to spend time with others according to the passage?

A．Small stores． B．Supermarkets． C．Shopping malls D．Superstores．

3.Why can the superstores sell products at much lower prices?

A．Because they can buy goods at a reduction in price．

B．Because they are across the United States．

C．Because they sell all kinds of products people need．

D．Because they are built near small towns．

4.What’s the disadvantage of online shopping according to the passage?

A．Wasting time． B．Fixed prices．

C．No chance to do physical activities. D．Leaking personal information．

阅读下面短文，从短文所给各题的四个选项（A、B、C、D）中选出能填入相应空白处的最佳选项。

Newcomers（新来的人） to the United States are often 36 by the schools. American schools 37 seem so different from the schools they know in 38 parts of the world. American education is based on the 39 that children 40 to learn to think 41 themselves. The school should be the 42 where they learn to do this. 43 , children learn the “three R’s” [(Reading, Writing and Arithmetic(算术)], history and government (often called Social Studies) and many other 44 . They also learn 45 be independent(独立的)，how to make their own judgement(判断), and how to develop their own 46 and interests. The American teacher does not 47 the children in her class to sit 48 hands folded quietly and to say 49 . She wants them to listen attentively(专心地) to ask questions. She knows that 50 children learn from books is 51 . She also knows that it is necessary for them to know how to use this 52 for their 53 and development. During Open School Week, parents have a 54 to see how American education 55 .

【小题１】A. happy B. afraid C. glad D. surprised

【小题１】 A. some time B. sometime C. sometimes D. some times

【小题１】A. other B. the other C. another D. all

【小题１】 A. opinion B. idea C. promise D. conclusion

【小题１】A. need B. needed C. dare D. dared

【小题１】A. of B. against C. for D. with

【小题１】 A. place B. space C. room D. area

【小题１】A. From school B. out school C. By school D. In school

【小题１】A. lessons B. knowledge C. subjects D. object

【小题１】 A. when to B. how to C. what to D. where to

【小题１】A. ability B. skill C. abilities D. skills

【小题１】 A. think B. want C. let D. make

【小题１】 A. with B. across C. over D. above

【小题１】A. something B. anything C. nothing D. much

【小题１】A. that B. which C. where D. what

【小题１】A. important B. unimportant C. necessary D. useless

【小题１】A. study B. work C. learning D. aim

【小题１】A. growing B. growth C. future D. tomorrow

【小题１】A. ability B. possibility C. interest D. chance

【小题１】A. develops B. learns C. goes D. works

试题分类