Plants are chemical factories. Many of the chemicals that they produce are useful to humans. Besides food, plants provide material for paper, buildings, medicines and many others. Scientists study the chemicals to treat certain types of cancer.

On the other hand, the fast growth of the human population is changing the earth quickly. Only by understanding how human activities affect our environment can we predict global climate changes. Scientific studies of these changes and their effect on natural ecosystems and crop production are of great importance to the future of our society.

Other environmental issues, such as pollution, also interest scientists. Many plant species are especially sensitive to certain pollutants. Scientists study the effects of different types of pollution on plants. They use their results to advise lawmakers to make laws for environmental protection and to save priceless natural areas.

By using plant tissue culture（植物細(xì)胞培養(yǎng)），scientists can grow plants from single cells. This has exciting possibilities in biotechnology, forestry and so on. For example, the American chestnut was once a widespread tree in the Eastern forests. Today it has nearly disappeared because of a disease-producing fungus that causes chestnut to die. The American chestnut recently has been grown in plant tissue culture.

The earth’s biological diversity or the kinds of living things are decreasing. As humans change the environment for their own purposes, plants and animals living in these areas become increasingly endangered．Scientists work to identify and understand new plant species, especially in such biologically rich areas as rain forests. Perhaps a plant undiscovered now will become an important food crop. There are probably many undiscovered plants that produce useful drugs to cure or treat human disease. Biological diversity also provides an important source of new genes to improve the plants we now use. As techniques of genetic engineering improve, so will our ability to improve our plants.

1．Which of the following is not true according to this passage?

A．All the chemicals we need are produced by plants.

B．If we can understand how human activities affect our environment, we can predict global climate changes.

C．Science plays an important role in improving the plants.

D．Scientists use their scientific study results to make laws for environmental protection and to save priceless natural areas.

2．We can know from the Paragraph2 and Paragraph3 that_______.

A．it is global climate changes that endanger plant

B．human activities influence plants greatly

C．pollution does little harm to many plants

D．scientific studies on plant species are important to stop pollution

3．The underlined sentence means___________.

A．plants can produce many chemicals needed in chemical factory

B．plants can be made into many products in factories

C．scientists can use plants to study many chemicals

D．scientists can offer people many necessary materials

4．The importance of biological diversity lies in that_____________________.

A．we can have new species to take the place of the endangered

B．it can populate the earth with as many plants as possible

C．it has many possible values to human being

D．people may use it to cure or treat human disease

5．The best title for the passage might be ____________.

A．Finding New Plant Species

B．Botany and Society

C．The Chemical Factories

D．New Genes to Improve the Plants

 

1．A文章第一段告訴我們，植物制造的許多化學(xué)品多是我們?nèi)祟愋枰�，但這并不意味著人類需要的所有的化學(xué)品都是植物制造的。

2．B第二段的第一句“…the fast growth of the human population is changing the earth quickly”是這兩段的論點(diǎn)。

3．D從后面的描述看，植物可以給我們?nèi)祟惡芏嘤杏玫谋匦杵贰?/p>

4．C由最后一段后半部分向我們講述了biological diversity的重要價值：There are probably many undiscovered plants that produce useful drugs to cure or treat human disease. Biological diversity also provides an important source of new genes to improve the plants we now use.

5．B縱觀全文可以看出，文章重點(diǎn)向我們講述了植物和我們?nèi)祟惻c社會的關(guān)系。首先開篇點(diǎn)題，告訴我們植物是我們?nèi)祟惐匦璧亩喾N化學(xué)物質(zhì)的制造工廠。后面圍繞這一點(diǎn)從正反兩方面說明如何保護(hù)好這一工廠：減少人類頻繁活動對此造成的污染；搞好科研，發(fā)現(xiàn)/開發(fā)植物新品種。

 

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E. October – this mid-autumn month is still pleasantly warm with average temperatures of 20°C. Days are mostly cloudy and overcast although rainfall levels are relatively low, averaging 70mm for rain for the month.

F. December – it is one of the coldest months of the year with average temperatures of 13°C. Night can be very cold. Mostly sunny, with a moderate average monthly rainfall of 60mm.

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4.Eggplants – these are tropical or subtropical, hot-season vegetables that need lots of direct sunlight. They grow best when the weather is very hot and there is plenty of water in the soil.

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第三部分：閱讀（共兩節(jié)，滿分40分）

第一節(jié)：閱讀下面短文，從每題所給的A、B、C、D四個選項中，選出最佳選項，并把答案寫在答題卷上。（共15小題，每小題2分，滿分30分）

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Many Asian countries have been using bamboo for hundreds of years. They often use bamboo for building new buildings. As a matter of fact, the cables (繩索) that hold up the hanging bridge across the Min River in Sichuan are made of bamboo. The bridge has been in use for more than 1,000 years, and is still holding strong.

In Africa, engineers are teaching poor farmers how to find water using bamboo. These African countries need cheap ways to find water because they have no money, and their fields often die from no rain and no water. It seems that bamboo is one of the best things they can use. Bamboo pipes and drills (鉆) can help to make the poor thirsty fields to be watered.

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A. It is thin and easy to cut.                                 B. It grows everywhere.

C. It grows quickly after its cut short.              D. It is short and green.

42.The sentence “while others may grow to more than 30 centimeters across.” means “Some other bamboo plants may grow to be very _______.”

A. short                     B. strong                            C. thick                                 D. tall

43.From the text we know ______.

A. most people call bamboo plant trees

B. a bamboo plant may grow 4.5 meters in three days

C. the bamboo plant changes its colors when it grows

D. a bridge held by bamboo cable was built thousands of years ago

44.Why did the engineers teach the poor farmers in Africa to make use of bamboo?

A. Because it is cheap.                                        B. Because it is colorful.

C. Because it drills fast.                                        D. Because it is used by Asians.

45.Which of the following is NOT true?

A. There are many different kinds of bamboo with different colors.

B. Cables made of bamboo can last for over a thousand years.

C. Bamboo can be used for buildings, bridges and watering projects(工程).

D. Bamboo plants are able to grow well in any part of the world.

 

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