题目内容
something in common: they all need energy to work. Energy has many different forms. One form, electricity,
comes mostly from steam-powered generators (蒸汽发电机). Steam is made by buming coal, oil, or natural
gas. Gasoline(汽油) is another form of energy. Casoline is made from oil. Oil has many other uses. Paints,
fertilizers, and plastics are made from it. We even use it to heat buildings. Coal, oil, and gas are natural
resources (资源). We take them from nature to make our lives easier.
We can classify (分类) natural resources as either renewable or nonrenewable. Coal, oil, and gas are
nonrenewable. They take millions of years to form. Some scientists predict that we will run out of oil and
gas in 50 to 100 years. Coal is more plentiful. So it may last for hundreds of years. Resources such as wood
and water are renew- able. They can be grown or recycled naturally. They can, however, become limited
from overuse.
We have developed some altemate (替代的) sources of energy. But these sources have disadvantages. For
example, hydroelectric power, or energy from running water, affects the ecology (生态) of surrounding areas.
Nuclear power (核电), another altemate source, presents the threat (威胁) of nuclear accidents. There are also
problems related to the storage (储存) of nuclear wastes. Solar and wind energies aren't consistent. We can't
depend on them. Geothermal energy, caused by heat from inside the earth, is tapped by drawing steam and
hot water from pools and geysers. This energy source, like most others, isn't fully developed.
It's time to get serious about energy. We must find practical, alternate energy sources. If we wait too long,
it will be too late. We will run out of coal, oil, and natural gas. Then we won't have the resources to make
altemate energy sources.
________________________________________
2. How long may coal last according to the passage?
________________________________________
3. Why are wood and water renewable resources?
________________________________________
4. What can be problems with nuclear power?
________________________________________
5. What's the main idea of the passage?
________________________________________
2. For hundreds of years.
3. Because they can be grown or recycled naturally.
4. The threat of nuclear accidents and the storage of nuclear wastes.
5. People must get serious about developing alternate sources of energy.
(答案不唯一)
阅读理解
High in the mountains, and deep in the forest, lives a lake with many plants and animals in and around her. The plants and animals have enough food and clean water to keep them healthy. The wind carries pure air, and the rain comes down clear and clean.
But recently, Lucy Lake and her friends haven’t been feeling very well. All the plants and animals get together to talk about the problem. “Why are we sick?” “What can we do?” ask all of them. No one has any answers.
Just then two hikers appear. The animals tell them about their problems. “Can you help us?” they ask. “Yes,” one hiker says. “I think it’s because of acid rain.”
“Acid rain comes from chemicals(化学物质) in the air. The pollution comes from factories, cars and trucks.”
“So, although I don’t want to, I help the pollution travel through the air!” says the wind. “And I carry it to the land!” cries the rain.
“If you can help us think of some solutions(解决方法), we will send a message to tell people how to clean up our environment,” one hiker says.
With the help of the plants and animals, the two hikers make a list of ideas for saving Lucy Lake and her friends.
Time passes, and the forest and lake begin to feel a little better.
The next time the hikers climb up the mountains to Lucy Lake, they smile at what they find. “We’re glad things have started to change,” one hiker says. “And we’re glad you helped us make a difference,” says the other.
1.The underlined word “pure” can be replaced by “____”.
|
A.polluted |
B.clean |
C.cold |
D.cool |
2.The two hikers are most probably ____.
|
A.scientists |
B.teachers |
C.doctors |
D.reporters |
3.____ have (has) nothing to do with the cause of acid rain.
|
A.The rain |
B.Human beings |
C.The wind |
D.The plants and animals |
4.The underlined word “you” refers to (指) ____.
|
A.Lucy Lake |
B.the plants and animals |
|
C.one of the two hikers |
D.the wind and the rain |
5.Which of the following is NOT true?
|
A.Acid rain is very harmful only to plants and animals. |
|
B.Human activities are the main cause of acid rain. |
|
C.Acid rain can make the living things in the environment get sick. |
|
D.We should clean up our environment to protect us against acid rain. |