The author writes the passage to . A. show us the function of major sports B. encourage us to go in for green sports C. discuss the major influence of popular sports D. introduce different types of environment-friendly sports B Have you ever noticed the colour of the water in a river or stream after a heavy rainfall? What do you think caused this change in colour? It is soil that has been washed into the river from the river bank or from the nearby fields. Components of Soft Soil is made up of a number of layers(层).each having its own distinctive colour and texture.The upper layer is known as the litter.It acts like a blanket.limiting temperature changes and reducing water loss.The topsoil layer is made up of small particles of rock mixed with rotten plant and animal matter called humus.which is black and gives the topsoil its dark colour.This layer is usually rich in nutrients.oxygen.and water.Below the topsoil is the subsoil.a layer that contains more stones mixed with only small amounts of organic matter.This layer is lighter in colour because of the lack of humus.Beneath the soil lies a layer of bedrock. Soil forms from the bottom up.Over time bedrock is attacked by rain, wind.frost, and snow.It is gradually broken down into smaller particles in a process called weathering.Plants begin to grow.and rotten materials enrich the topsoil.Most of the soil in Eastern Canada,for example,was formed from weathered rock that was exposed when the ice disappeared l2.000 years ago. Water Beneath the Soil Surface water collects and flows above the ground in lakes,ponds,and rivers.Once in the soil or rock.it is called groundwater.Gravity pulls groundwater through the soil in a process called percolation.Eventually the water reaches a layer called the water table.Under this is bedrock through which water cannot percolate. As water percolates downward.it dissolves organic matter and minerals from the soil and carries them to deeper layers.This causes a serious problem because plants require these nutrients for growth. Soil pH Soil can be acidic.neutral.or basic.The pH of the soil is determined by the nature of the rock from which it was formed.and by the nature of the plants that grow and rot in it. The acidity of rain and snow can lower the pH of the groundwater that enters the soil.By burning fossil fuels such as coal.oil and gasoline.humans have been contributing to higher levels of acidity in many soils.When fossil fuels are burned.gases are released into the air and then fall back to earth as acid rain.Acid soil increases problem of carrying nutrients to lower soil levels.As nutrients are removed.soil is less fertile.Plants grow more slowly in acidic soil.and also become easily attacked by diseases. 查看更多

 

题目列表(包括答案和解析)

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.  

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses (球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.  

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.  

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.  

  64. Which of the following is the author most probably in favor of?

  A. Cycling around a lake.

  B. Motor racing in the desert.

  C. Playing basketball in a gym.

  D. Swimming in a sports center.

  65. What do we know about golf from the passage?

  A. It is popular in Portugal and Spain.

  B. It causes water shortages around the world.

  C. It pollutes the earth with chemicals and wastes.

  D. It needs water and electricity to keep its courses green.

  66. The author uses power walking as an example mainly because______.

  A. it is an outdoor sport

  B. it improves our health

  C. it uses fewer resources

  D. it is recommended by experts

  67. The author writes the passage to_______.

  A. show us the function of major sports

  B. encourage us to go in for green sports

  C. discuss the major influence of popular sports

  D. introduce different types of environment-friendly sports

查看答案和解析>>

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.  

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses (球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.  

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.  

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.  

  64. Which of the following is the author most probably in favor of?

  A. Cycling around a lake.

  B. Motor racing in the desert.

  C. Playing basketball in a gym.

  D. Swimming in a sports center.

  65. What do we know about golf from the passage?

  A. It is popular in Portugal and Spain.

  B. It causes water shortages around the world.

  C. It pollutes the earth with chemicals and wastes.

  D. It needs water and electricity to keep its courses green.

  66. The author uses power walking as an example mainly because______.

  A. it is an outdoor sport

  B. it improves our health

  C. it uses fewer resources

  D. it is recommended by experts

  67. The author writes the passage to_______.

  A. show us the function of major sports

  B. encourage us to go in for green sports

  C. discuss the major influence of popular sports

  D. introduce different types of environment-friendly sports

查看答案和解析>>

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.  

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses (球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.  

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.  

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.  

  64. Which of the following is the author most probably in favor of?

  A. Cycling around a lake.

  B. Motor racing in the desert.

  C. Playing basketball in a gym.

  D. Swimming in a sports center.

  65. What do we know about golf from the passage?

  A. It is popular in Portugal and Spain.

  B. It causes water shortages around the world.

  C. It pollutes the earth with chemicals and wastes.

  D. It needs water and electricity to keep its courses green.

  66. The author uses power walking as an example mainly because______.

  A. it is an outdoor sport

  B. it improves our health

  C. it uses fewer resources

  D. it is recommended by experts

  67. The author writes the passage to_______.

  A. show us the function of major sports

  B. encourage us to go in for green sports

  C. discuss the major influence of popular sports

  D. introduce different types of environment-friendly sports

查看答案和解析>>

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your choice of sport might have great influence on the environment.

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemical and huge amounts of energy are used to keep its courses in good condition .This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.                                    

There are many environment-friendly sports.Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.

1.What do we know about golf from the passage?

A.It is not played in Portugal and Spain at all.

B.It causes water shortages around the world.

C.It pollutes the earth with chemicals and wastes.

D.It needs water and electricity to keep its courses green.

2.The author uses power walking as an example mainly because ________.

A.it is an outdoor sport

B.it improves our health

C.it uses fewer resources

D.it is recommended by experts

3.The author writes the passage to ________

A.show us the function of major sports

B.encourage us to go in for green sports

C.discuss the major influence of popular sports

D.introduce different types of environment-friendly sports

 

查看答案和解析>>

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.  

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses (球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.  

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.  

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.  

  64. Which of the following is the author most probably in favor of?

  A. Cycling around a lake.

  B. Motor racing in the desert.

  C. Playing basketball in a gym.

  D. Swimming in a sports center.

  65. What do we know about golf from the passage?

  A. It is popular in Portugal and Spain.

  B. It causes water shortages around the world.

  C. It pollutes the earth with chemicals and wastes.

  D. It needs water and electricity to keep its courses green.

  66. The author uses power walking as an example mainly because______.

  A. it is an outdoor sport

  B. it improves our health

  C. it uses fewer resources

  D. it is recommended by experts

  67. The author writes the passage to_______.

  A. show us the function of major sports

  B. encourage us to go in for green sports

  C. discuss the major influence of popular sports

  D. introduce different types of environment-friendly sports

查看答案和解析>>


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