题目内容
Acid rain comes from _____.
A. the river B. the water C. the clouds D. the forests
C
【解析】略
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暑假作业北京艺术与科学电子出版社系列答案Once she was beautiful and rich, but now she becomes dirtier and dirtier, poorer and poorer. It is due to what we have done to her. Please have a good look at her: polluted rivers and lakes, growing deserts, the destruction of the forests and wild life, and the depletion (消耗，用尽) of the ozone layer (臭氧层)...
Can she bear to see her children putting the waste here and there? Can she bear to see her children cutting down the trees and destroying the grassland, to see the acid rain destroying everything? Can we bear to see our mother suffering (受苦) so much? Isn’t it time for us to ask ourselves whether this is the way to treat our mother?
Floods, droughts, acid rain..., these are the punishments (惩罚) from nature. Everyone should know that there is only one earth. If we go on treating her like this, it won’t be fit for us to live in any longer. It’s time for us to love her, take good care of her and cure her. We should save the earth so as to save ourselves.
【小题1】 What does the earth look like now?
| A．It has clean rivers, lakes and green forests. |
| B．It is like a beautiful girl. |
| C．It is more beautiful and richer. |
| D．It is dirtier and dirtier, poorer and poorer. |
| A．Know | B．Stand | C．Imagine | D．Hear |
| A．The earth—our mother. |
| B．Defenders of the Earth (地球卫士). |
| C．The earth is very beautiful and healthy. |
| D．The water on the earth is very clean. |
Earth Day is April 22. But on all other days, we must also remember how important water is. The water that we use is the most important natural resource on the earth. Today we face serious water problems. One of them is water pollution. All kinds of things from cars, factories, farms and homes make our rivers, lakes and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish, too.
How do cars and factories make our water dirty? First they pollute the air. Then when it rains, the rain water makes our drinking water dirty. Dirty rain, called acid rain is also bad for plants, animals and buildings. Scientists say that in 30 years, more than half of the people in the world won’t have enough clean water. We have to learn how to stop wasting water. One of the first steps is to develop ways of reusing it. Today in most large cities, water is used only once and then sent out into a sewer system (下水道). From there it returns to the sea or goes underground.
But even though every large city reused its water, we would still not have enough. So we should make use of sea water by removing the salt in it. If we can take these steps, fresh water won’t be used up.
【小题1】The world is thirsty for water because _______.
| A．we don’t have enough fresh water | B．a lot of water goes into sewer systems |
| C．only 70% of the earth’s surface is water | D．sea water is widely used rather than fresh water |
| A．is only bad for living things | B．is not bad for buildings and factories |
| C．can be produced in factories | D．is bad for people, animals, plants and buildings |
| A．use the water with salt in it | B．remove the salt from sea water |
| C．get water from underground | D．reuse the water in cities |
| A．Fresh water and sea water | B．A thirsty country |
| C．The importance of water | D．The world’s water problem |
The world is not only hungry but also thirsty for water. This may seem strange to you, since nearly 70% of the earth’s surface is covered with water. But about 97% of that is sea water or salt water. Man can only drink and use the other 3% of fresh water from rivers, lakes, underground and so on. And we can not even use all of that because some of it has been made dirty.
Earth Day is April 22. But on all other days, we must also remember how important water is. The water that we use is the most important natural resource on the earth. Today we face serious water problems. One of them is water pollution. All kinds of things from cars, factories, farms and homes make our rivers, lakes and oceans dirty. Polluted water is very bad for people to drink. And dirty water is bad for fish, too.
How do cars and factories make our water dirty? First they pollute the air. Then when it rains, the rain water makes our drinking water dirty. Dirty rain, called acid rain is also bad for plants, animals and buildings. Scientists say that in 30 years, more than half of the people in the world won’t have enough clean water. We have to learn how to stop wasting water. One of the first steps is to develop ways of reusing it. Today in most large cities, water is used only once and then sent out into a sewer system (下水道). From there it returns to the sea or goes underground.
But even though every large city reused its water, we would still not have enough. So we should make use of sea water by removing the salt in it. If we can take these steps, fresh water won’t be used up.
【小题1】The world is thirsty for water because _______.
| A．we don’t have enough fresh water | B．a lot of water goes into sewer systems |
| C．only 70% of the earth’s surface is water | D．sea water is widely used rather than fresh water |
| A．is only bad for living things | B．is not bad for buildings and factories |
| C．can be produced in factories | D．is bad for people, animals, plants and buildings |
| A．use the water with salt in it | B．remove the salt from sea water |
| C．get water from underground | D．reuse the water in cities |
| A．Fresh water and sea water | B．A thirsty country |
| C．The importance of water | D．The world’s water problem |
Every time you turn on the television or take a ride in a car ,you could be adding to a problem called acid rain(酸雨). In this article, you’ll learn how acid is created, and how it affects us, and more importantly, what we all can do to prevent it.
How is acid rain created?
When people use fuels(燃料), such as coal and gasoline, poisonous gases are given off. When these gases mix with rain, acid rain forms. Many power stations burn fuels in order to create the electricity(电) that we use in our homes and offices every day. Cars and trucks also send these gases into the air when they burn gasoline .When rain mixes with these gases, harmful things called acids form. This is acid rain.
How does acid rain affect us?
Acid rain damages(毁坏)everything that it touches. It poisons our rivers, ponds, lakes, and oceans along with all the life in them. It pollutes our soil and crops, harms trees, and can even kill fish and plants. Acid rain also eats away at buildings.
How can we prevent acid rain?
We need to cut down on the pollution that gets into our air. Turn off lights, television, and other electrical appliances if you are not using them, Walk or take a bike whenever possible. If you are travelling a long distance, take a bus or train to save fuel.
As research shows, acid rain harms our environment. But people everywhere can take small steps now to help protect our environment for future generations.
【小题1】When power stations burn fuel, _______.
| A．acid rain form | B．air pollution is caused |
| C．noise pollution is caused | D．acid rain gets heavier |
| A．Go to school on foot or by bike if we can. |
| B．Go to bed earlier in order to use less electricity. |
| C．Travel by bus to prevent acid rain. |
| D．Turn off the television on rainy days. |
| A．Preventing Acid Rain | B．Forming of Acid Rain |
| C．Acid rain, Heavy Rain | D．Acid Rain, Killer Rain |
把正确的选项填入空白处，使短文意思完整。（5分）
In many countries, people produce power from coal, but it is very dirty and causes acid rain. Some countries use nuclear energy to produce power.1 . To solve the energy problem, people all over the world are looking for new ways to produce power.
China is one of the first countries in the world to use biogas technology. 2 . This renewable energy is used in people’s everyday life.
3 . Now there are electric vehicles in many countries. They are very efficient and cost very little to run. 4 , there will be an increase in electricity needs if they are widely used.
In China, the best—known maglev train is the German—built one in Shanghai. The train can reach a top speed of 431 km per hour.5 . There is no wheel noise, because there are no wheels. However, maglev guide paths are much more expensive than traditional steel railways.
| A．Farmers recycle straw, grass and animal waste to make biogas. B．Although electric vehicles produce no pollution. C．However, nuclear power can be very dangerous. D．It is quiet and quick. E．Electric vehicles were developed in the 1990s. |