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

第四部分：阅读理解（共20小题；每小题2分，满分40分）

　阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

A

The food we eat seems to have far-reaching effects on our health. Although science has made great steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to diet as well, especially cancer of the colon（结肠）. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is not a new discovery. In 1945, government researchers realized that carcinogenic nitrates, commonly used to preserve color in meats, and other food additives(添加剂), caused cancer. Yet, these additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed（经过加工的） food are helpful or harmful. The additives, which we eat, are not all so direct. Farmers often give penicillin（青酶素） to beef and living animals, and because of this, penicillin has been found in the milk of treated cows. Sometimes, similar drugs are given to animals not for medical purposes, but for financial(财政的) reasons. The farmers are simply trying to fatten the animals in order to get a higher price on the market. Although the Food and Drug Administration has tried repeatedly to control these behaviors, the practices continue.

41．What is the best possible title of the passage?

       A．Drug and health             B．Food and illness

       C．food and culture          D．Health and science

42．Which of the following statements is NOT true?

       A．Drugs are given to animals mostly for medical reasons.

       B．Some of the additives in our food are added directly to the food and some are given to living animals.

       C．Researchers have realized the possible dangers of food additives for over sixty years.

       D．Food may cause 40% of cancer in the world.

43．How has science done something harmful to mankind?

       A．Because of science, diseases caused by contaminated（被污染的）food have been actually reduced.

       B．It has caused a lack of information concerning the food.

       C．Because of the application of science, some potentially(潜在的) harmful substances（物质）have been added to food.

       D．It causes the animals to become fatter.

44．The government tries to     

       A．control the market price of food

       B．stop the farmers from giving drugs to animals to make more money.

       C．get rid of the addictives from the packaged food.

       D．use no medicine on the animals