In 2000, Chinese scientists completed their part of the international human genome project, that Chinese scientists are among the world’s best. A. to prove B. proving C. proved D. having proved 题目和参考答案——青夏教育精英家教网—

Planting trees around poultry farms can improve air and water quality -- and relations with neighbors. Research has shown that just three rows of trees near poultry houses can reduce the release of dust and ammonia(氨). They can also reduce the strong smell of ammonia gas.

The trees take dust, ammonia and odors in their leaves. They also provide shade from the sun, so they reduce cooling costs in summer. And they act as a windbreak, so they reduce heating costs in winter. Trees can also improve water quality around farms by removing pollutions from soil and groundwater.

Several years ago, people were objecting to the odor of poultry farms on the Delmarva Peninsula in the eastern United States. Delmarva is where the states of Delaware, Maryland and Virginia come together. Two thousand farms there can each house an average of seventy-five thousand chickens.

Traditionally the farms used windows to provide fresh air in the chicken houses. Farmers rarely planted trees or tall crops around the buildings, so there would be no barrier to the airflow. But then farms began to use new ventilation systems. Instead of windows, the new systems used tunnel fans to circulate air. The fans directed airflow from the poultry houses toward the homes of neighbors.

Researchers began dealing with the problem in two thousand. They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half. And they found that smells were reduced by eighteen percent.

Farmers may think trees will take too long to grow and be effective. But some trees can grow quickly. At least one-third of the Delmarva farms have planted trees, technically known as vegetative environmental buffers. The idea offers a way to cut pollution, save money and energy, and make the neighbors happy.

49. The second paragraph mainly tells us ______.

A. planting trees as much as possible

B. the advantages of trees

C. how to reduce heating costs

D. why trees are received

50. The word “odor” in paragraph 3 means ______.

A. plant B. smell C. height D. water

51. The farms on the Delmarva Peninsula used to use ______ in chicken houses to provide fresh air.

A. trees B. tunnel fans C. windows D. poles

52. It can be learned from the last two paragraphs that ______.

A. three rows of trees are really good to the environment

B. researches began to realize the problem in 2000

C. most farmers show interest in planting trees

D. the trees growing quickly can be cut off in a few years

Planting trees around poultry farms can improve air and water quality -- and relations with neighbors. Research has shown that just three rows of trees near poultry houses can reduce the release of dust and ammonia(氨). They can also reduce the strong smell of ammonia gas.

The trees take dust, ammonia and odors in their leaves. They also provide shade from the sun, so they reduce cooling costs in summer. And they act as a windbreak, so they reduce heating costs in winter. Trees can also improve water quality around farms by removing pollutions from soil and groundwater.

Several years ago, people were objecting to the odor of poultry farms on the Delmarva Peninsula in the eastern United States. Delmarva is where the states of Delaware, Maryland and Virginia come together. Two thousand farms there can each house an average of seventy-five thousand chickens.

Traditionally the farms used windows to provide fresh air in the chicken houses. Farmers rarely planted trees or tall crops around the buildings, so there would be no barrier to the airflow. But then farms began to use new ventilation systems. Instead of windows, the new systems used tunnel fans to circulate air. The fans directed airflow from the poultry houses toward the homes of neighbors.

Researchers began dealing with the problem in two thousand. They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half. And they found that smells were reduced by eighteen percent.

Farmers may think trees will take too long to grow and be effective. But some trees can grow quickly. At least one-third of the Delmarva farms have planted trees, technically known as vegetative environmental buffers. The idea offers a way to cut pollution, save money and energy, and make the neighbors happy.

The second paragraph mainly tells us ______.

A. planting trees as much as possible

B. the advantages of trees

C. how to reduce heating costs

D. why trees are received

The word “odor” in paragraph 3 means ______.

A. plant B. smell C. height D. water

The farms on the Delmarva Peninsula used to use ______ in chicken houses to provide fresh air.

A. trees B. tunnel fans C. windows D. poles

It can be learned from the last two paragraphs that ______.

A. three rows of trees are really good to the environment

B. researches began to realize the problem in 2000

C. most farmers show interest in planting trees

D. the trees growing quickly can be cut off in a few years

C

Planting trees around poultry farms can improve air and water quality -- and relations with neighbors. Research has shown that just three rows of trees near poultry houses can reduce the release of dust and ammonia(氨). They can also reduce the strong smell of ammonia gas.

The trees take dust, ammonia and odors in their leaves. They also provide shade from the sun, so they reduce cooling costs in summer. And they act as a windbreak, so they reduce heating costs in winter. Trees can also improve water quality around farms by removing pollutions from soil and groundwater.

Several years ago, people were objecting to the odor of poultry farms on the Delmarva Peninsula in the eastern United States. Delmarva is where the states of Delaware, Maryland and Virginia come together. Two thousand farms there can each house an average of seventy-five thousand chickens.

Traditionally the farms used windows to provide fresh air in the chicken houses. Farmers rarely planted trees or tall crops around the buildings, so there would be no barrier to the airflow. But then farms began to use new ventilation systems. Instead of windows, the new systems used tunnel fans to circulate air. The fans directed airflow from the poultry houses toward the homes of neighbors.

Researchers began dealing with the problem in two thousand. They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half. And they found that smells were reduced by eighteen percent.

Farmers may think trees will take too long to grow and be effective. But some trees can grow quickly. At least one-third of the Delmarva farms have planted trees, technically known as vegetative environmental buffers. The idea offers a way to cut pollution, save money and energy, and make the neighbors happy.

49. The second paragraph mainly tells us ______.

A. planting trees as much as possible

B. the advantages of trees

C. how to reduce heating costs

D. why trees are received

50. The word “odor” in paragraph 3 means ______.

A. plant B. smell C. height D. water

51. The farms on the Delmarva Peninsula used to use ______ in chicken houses to provide fresh air.

A. trees B. tunnel fans C. windows D. poles

52. It can be learned from the last two paragraphs that ______.

A. three rows of trees are really good to the environment

B. researches began to realize the problem in 2000

C. most farmers show interest in planting trees

D. the trees growing quickly can be cut off in a few years

China recorded fewer traffic accidents in 2001 than in 2000 and a lower going continued in January this year .
The traffic accidents in 2001 totaled 270, 000 , fewer by 20, 000 than in 2000 .
But the number of the dead for 2001 was 54, 000 , an increase of 1, 000 from the year before . The increase was not as slow as that in recent years .
A government official said in Beijing yesterday that 3, 821 persons were killed in highway traffic accidents last month , a drop of 12.8 percent from January 2001 . He also said there were 21, 201 traffic accidents in the first month of the year , 10.1 percent fewer than January last year , and 11, 700 people injured .
The traffic accidents last year caused a loss worth 27.32 million yuan , about 2.9 million US dollars .
Economic Daily also said 170, 000 persons were injured in the traffic accidents in 2001 , fewer by 10, 000 than in 2000 .
( From China Daily , February 16 , 2002)
1. In 2000 the total number of the traffic accidents was ________ .
A. 290, 000     B. 250, 000      C. 270, 000      D. 20, 000
2. In 2000 ________ persons were killed in the traffic accidents .
A. 1, 000     B. 53, 000      C. 54, 000      D. 55, 000
3. Which is true according to the news report ?
A. The traffic accidents in 2002 will go up continuously .
B. Economic Daily said the traffic accidents caused a loss worth 2.9 million US dollars in 2000 .
C. In January 2002 , there were 3, 821 highway traffic accidents .
D. There were more traffic accidents in January 2001 than in January 2002 .
4. The best title for this news report should be ________ .
A. Road Accidents 2001        B. Road Accidents 2000
C. Death Up or Down This Year  D. $ 2.9 Million Loss in Traffic Accidents

China recorded fewer traffic accidents in 2001 than in 2000 and a lower going continued in January this year .

The traffic accidents in 2001 totaled 270, 000 , fewer by 20, 000 than in 2000 .

But the number of the dead for 2001 was 54, 000 , an increase of 1, 000 from the year before . The increase was not as slow as that in recent years .

A government official said in Beijing yesterday that 3, 821 persons were killed in highway traffic accidents last month , a drop of 12.8 percent from January 2001 . He also said there were 21, 201 traffic accidents in the first month of the year , 10.1 percent fewer than January last year , and 11, 700 people injured .

The traffic accidents last year caused a loss worth 27.32 million yuan , about 2.9 million US dollars .

Economic Daily also said 170, 000 persons were injured in the traffic accidents in 2001 , fewer by 10, 000 than in 2000 .

( From China Daily , February 16 , 2002)

1. In 2000 the total number of the traffic accidents was ________ .

A. 290, 000 B. 250, 000 C. 270, 000 D. 20, 000

2. In 2000 ________ persons were killed in the traffic accidents .

A. 1, 000 B. 53, 000 C. 54, 000 D. 55, 000

3. Which is true according to the news report ?

A. The traffic accidents in 2002 will go up continuously .

B. Economic Daily said the traffic accidents caused a loss worth 2.9 million US dollars in 2000 .

C. In January 2002 , there were 3, 821 highway traffic accidents .

D. There were more traffic accidents in January 2001 than in January 2002 .

4. The best title for this news report should be ________ .

A. Road Accidents 2001 B. Road Accidents 2000

C. Death Up or Down This Year D. $ 2.9 Million Loss in Traffic Accidents

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