Simply by analyzing a drop of blood, a doctor will be able to diagnose a birth defect or even cancer when it is in the early stage; using new technology, a material lighter but much stronger than stee 题目和参考答案——青夏教育精英家教网—

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Simply by analyzing a drop of blood, a doctor will be able to diagnose a birth defect or even cancer when it is in the early stage; using new technology, a material lighter but much stronger than steel can be produced.

These may sound like dreams at present. But the dreams may soon come true as research findings in laboratories are being turned into products more rapidly in the new century, according to experts participating in the fourth Asia-Pacific Economic Cooperation (APEC) Technomart, a technology exhibition and trade fair in Suzhou.　　

"Most people think nano-technology（纳米技术）is too far-fetched to be real. But in fact nano-technology has been applied in a wide range of fields, such as medicine. It is coming into our daily life," said Cheng Jiachong from a Hong Kong-based nano-technology firm.

Nano-technology based on the nanometer, the unit of which is a billionth of a meter, enables scientists to have new concepts of disease diagnosis and treatment on a molecular（分子）and atomic scale, Cheng said.　　

By using nanometer particles, a doctor can separate the fetus cells（胚胎细胞）from the blood of a pregnant woman to see if the development of the fetus is normal. This method is also being used in the early diagnosis of cancer and heart disease, he said.　　

One of the most significant impacts of nano-technology is at the bio-inorganic materials interface, according to Greg Tegart, executive advisor of the APEC Center for Technology Foresight.　　

"By combining enzymes（酶）and silicon chips we can produce biosensors. These could be implanted in humans or animals to monitor health and to deliver corrective doses（剂量）of drugs," he told the participants a technology forum during the exhibition.　　

"Nano-technology could affect the production of nearly every man-made object, from automobiles, tires and computer circuits（电路）, to advanced medicines and tissue replacement, and lead to the invention of objects yet to be imagined," said David Minns, a special advisor to the National Research Council of Canada.　　

It has been shown that carbon nano-tubes are ten times as strong as steel, with one sixth of the weight, and nano-scale systems have the potential to make supersonic transport cost- effective and to increase computer efficiency by millions of times, he said.

The experts agreed that the APEC technology exhibition and trade fair provided many chances for exchanges of innovative ideas and products.

1.Realization of the dreams mentioned in the first paragraph will mainly base on ________.

A. APEC B. Chinese scientist

C. the APEC Center for Technology Foresight D. Nano-technology

2.The length of a nanometer equals to ______.

A. meter B. meter C. meter D. meter

3. We can imply from what David Minns said that _________.

A. Nano-technology could only be used to invent new objects.

B. Nano-technology could be widely used to produce or invent objects.

C. Nano-technology is a money-consuming technology.

D. Nano-technology can not be used to improve the service of Internet.

4. Compared to steel, carbon nano-tubes are ________.

A. stronger and lighter B. lighter but as strong

C. stronger but as light D. poor in quality

【答案】

1.D

2.A

3.B

4.A

【解析】略

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The weight-loss world is full of assertions①, rarely proved, that some pill can help you “burn calories while you sleep.” But a recent Dutch study reports that it can be done – simply by eating more lean protein②.

Researchers report for the first time that consuming nearly a third of daily calories as lean protein – for example, lean meats without the skin – speeds up a person’s metabolism③ during sleep and that higher protein intake increases the burning of calories and fat during the day. Plus, when the study’s participants, who were all women of healthy weight, ate more protein, they felt fuller, more satisfied and less hungry than when they consumed a diet with the amount of protein, about 10 percent of calories.

The findings suggest that adding lean protein to your daily food “enables you to reach the same level of satiety④ that you are used to with about 80 percent of your normal energy intake,” notes Margriet Westerterp-Plantenga. “That means you can eat about 20 percent less and still have the same satiety.”

What gives protein its caloric edge? It’s more difficult for the body to metabolize protein than either fat or carbohydrates⑤. The body also doesn’t store protein as efficiently as it does carbohydrates or fat. So protein is more likely to be burned and that in turn requires more oxygen and helps you feel satisfied in the hours after eating.

But the latest findings don’t mean it’s time to dust off those high-protein diet books. The current study limited fat to about 30 percent of daily calories, and included 40 percent of calories as healthy carbohydrates, including fruit and vegetables. For example, lunch included bread, soy milk, fruit yogurt, tuna in water, tomatoes, cucumbers, feta cheese and salad dressing.

1. According the first paragraph, we know that ______.

A. there’re few studies on weight-loss in the world

B. many studies on weight-loss only cheat customers

C. only few studies are useful for weight-loss

D. there’re few studies about lean protein

2. According to the passage, lean protein can help burn calories while you sleep because ______.

A. it can slow down a person’s metabolism B. it’s difficult for the body to metabolize

C. it will not make you feel full D. it’s easy to be stored in the body

3. The underlined phrase “dust off” in the last paragraph means ______.

A. get rid of B. put away C. get ready to rewrite D. get ready to reuse

4. The passage is mainly to tell readers ______.

A. there is a good diet for weight-losers

B. you can burn your calories in your sleep

C. high-protein diet books will be popular

D. choosing right food is of great use

Reseachers at the University of Kansas say that people can accurately juage 90 percent of a stranger's personality simply by looking at the person’s shoes．“Shoes convey useful information about their wearers，’’the authors wrote in the new study published in the Journal of Research in Personality．

Lead researcher Omri Gillath said the judgments were based on the style，cost，color and condition of someone’s shoes．In the study，63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study’s participants．Volunteers in the study were photographed in their most commonly worn shoes，and then filled out a personality questionnaire．

Some of the results were expected：People with higher incomes most commonly wore expensive shoes，and flashier shoes were typically worn by outgoing people．However，some of the more specific results are strange enough．For example，“practical and functional’’ shoes were generally worn by more “pleasant" people，while ankle boots were more linked with ‘‘aggressive’’ personalities．The strangest of all may be that those who wore‘ ‘uncomfortable looking” shoes tend to have “calm” personalities．And if you have several pairs of new shoes or take extreme care of them，you may suffer from “attachment anxiety"，spending lots of time worrying about what other people think of your appearance．There was even a political calculation in the mix with more liberal(主张变革的)types wearing “shabbier and less expensive” shoes．

The researchers noted that some people will choose shoe styles to mask their actual personalities，but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities．

1.What does this text mainly tell us?

A．Shoes Call hide people’s real personalities．

B．Shoes convey false information about the wearer．

C．People’s personalities call be judged by their shoes．

D．People know little about their personalities．

2.The participants were asked to

A．provide pictures of their shoes

B．look at pictures of different shoes

C．design a personality questionnaire

D．hand in their commonly worn shoes

3.Which of the results is beyond people’s expectation?

A．Wealthy people often wear expensive shoes．

B．Pleasant people like wearing uncomfortable shoes．

C．Aggressive people are likely to wear"ankle boots．

D．Fashion shoes are typically worn by outgoing people．

4.People suffering from“attachment anxiety” tend to

A．wear strange shoes B．worry about their appearance

C．have a calm character D．become a political leader

5.The author wrote the text in order to

A．inform us of a new study B．introduce a research method

C．teach how to choose shoes D．describe different personalitie

Like distance runners on a measured course，all of us will move through time in a roughly predictable pattern．

In the first stage of our lives，we develop and grow, reaching toward the top of physical vitality(活力)．

After we grow up，however, the body begins a process of gradually wearing out．

A new awareness of physical fitness may help lengthen our years of health and vitality，yet nothing we do will work to stop the unavoidable force of aging．

Most of the changes of aging take place deep inside the body．The lungs become less able to take in oxygen．Powerful muscles gradually lose their strength．The heart loses power and pumps less blood．Bones grow easier to break．

Finally, we meet a stress，a stress that is greater than our physical resistance．Often，it is only a minor accident or chance infection(a disease caused by virus)，but this time，it brings life to an end．

In 1932，a classic experiment nearly doubled the lifetime of rats，simply by cutting back the calories in their diet The reason for the effect was then unknown．

Today, at the University of California at Berkley, Dr．Paul Seagle has also greatly lengthened the normal lifetime of rats．The result was achieved through a special protein limited diet，which had a great effect on the chemistry of the brain．Seagle showed that within the brain，specific chemicals control many of the signals that influence aging．By changing that chemical balance，the clock of aging can be reset．

For the first time, the mystery of why we age is being seriously challenged．Scientists in many fields are now making striking and far-reaching discoveries．

An average lifetime lasts 75 years，yet in each of us lies a potential for a longer life．If we could keep the vitality and resistance to disease that we have at age twenty, we would live for 800 years．

1.What does the underlined word “it” refer to?

A．Physical vitality．

B．Stress．

C．Aging．

D．Physical resistance．

2.Which of the following is not a change of aging?

A．People gradually lose their muscle strength．

B．Bones tend to break more easily．

C．The heart loses power and pumps less blood．

D．The lungs become unable to take in oxygen．

3.The author believes the following except that ．

A．human's life pattern is predictable

B．physical fitness can't stop the force of aging

C．human's lifetime will last longer than 75 years

D．all of the changes of aging take place deep inside the body

4.How did Dr．Paul Seagle lengthen the lifetime of rats in his experiment?

A．By keeping their physical fitness．	B．By cutting the calories in their diet．
C．By resetting their clock of aging．	D．By limiting the protein in their diet．

5.What is probably the best title for the article?

A．Two Great Experiments

B．The Mystery of Human Life

C．The Breakthrough in the Study of Aging

D．Ways to lengthen Human Life

Most British telephone cards are just plain green, but card collecting is becoming a popular hobby in Britain and collectors even have their own magazine, International Telephone Cards. One reason for their interests is that cards from around the world come in a wide variety of different and often very attractive design, There are 100,000 different cards in Japan alone, and there you can put your own design onto a bank card simply by using a photograph or a business card.

The first telephone cards, produced in 1976, were Italian. Five years later, the first British card appeared, and now you can buy cards in more than a hundred countries. People usually start collecting cards because they are attractive, small and light, and they do not need much space. It is also a cheap hobby for beginners, although for some people it becomes a serious business. In Paris, for example, there is a market where you can buy only telephone cards, and some French cards cost up to 4,000 pounds. The first Japanese card has a value of about 28,000 pounds. Most people only see cards with prices like these in their collectors’ magazine.

1.The passage is mainly about __________.

A. the history of phone cards.

B. phone card collecting as a hobby

C. reasons for phone card collecting

D. the great variety of phone cards

2.When did people in Britain begin to use phone card?

A. In 1971. B. In 1975 C. In 1976. D. In 1981.

3.The main reason for most people to collect phone cards is that _________.

A. they find the cards beautiful and easy to keep

B. they like to have something from different countries

C. they want to make money with cards

D. they think the cards are convenient to use

4.The writer mentions a market in Paris in order to show that __________.

A. card collecting is popular among young people

B. French and Japanese cards are the most valuable

C. People can make money out of card collecting

D. Card collectors’ magazines are very useful

Most British telephone cards are just plain green, but card collecting is becoming a popular hobby in Britain and collectors even have their own magazine, International Telephone Cards. One reason for their interest is that cards from around the world come in a wide variety of different and often very attractive designs. There are 100, 000 different cards in Japan alone, and there you can put your own design onto a blank card simply by using a photograph or a business card.

　　The first telephone cards, produced in 1976, were Italian. Five years later the first British card appeared, and now you can buy cards in more than a hundred countries. People usually start collecting cards because they are attractive, small and light , and they do not need much space. It is also a cheap hobby for beginners, although for some people it becomes a serious business. In Paris, for example, there is a market where you can buy only telephone cards, and some French cards cost up to 4, 000 pounds. The first Japanese card has a value of about 28, 000 pounds. Most people only see cards with prices like these in their collectors magazine.

1.The text is mainly about ________ .

A．the history of phone cards	B．phone card collecting as a hobby
C．reason for phone card collecting	D．the great variety of phone cards

2.When did people in Britain begin to use phone cards?

A．In 1971.　　

B．In 1975.　　

C．In 1976.

D．In 1981.

3.The main reason for most people to collect phone cards is that ________ .

A．they find the cards beautiful and easy to keep

B．they like to have something from different countries

C．they want to make money with cards

D．they think the cards are convenient to use

4.The writer mentions a market in Paris in order to show that ________

A．card collecting is popular among young people

B．French and Japanese cards are the most valuable

C．people can make money out of card collecting

D．card collectors magazines are very useful

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