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题型:阅读理解-阅读单选 难度:0.65 引用次数:69 题号:12854350

What would happen if the Amazon rainforest disappeared?

The Amazon rainforest is one of the most amazing places on earth. It covers 40% of South America, drives the South American economy and stores 86 billion tons of carbon. That would otherwise be polluting our atmosphere. However, about 750, 000 square kilometers of rainforest have been destroyed since 1978, all thanks to humans. If this continues, the Amazon rainforest could disappear within 100 years.

How bad would that be for our planet? Well, let's take a look. For starters, we'd be losing a huge amount of our planet's biodiversity. The Amazon rainforest has more plant and animal species than any other ecosystem on the land. If we destroy the Amazon, we will be destroying all that diversity too, and ruining an entire ecosystem at the same time.

That would have huge effects on earth. We'd all quickly realize how much we have been relying on the Amazon's resources for food and medicine. Most people are surprised when they find out that hundreds of drugs have come from things in the Amazon rainforest.

So who knows what other important treatments we could lose without the rainforest? But the most critical problem we would face if the Amazon completely disappeared would be a faster pace of climate change. If the Amazon rainforest continues to wither and die, it will stop being a source of oxygen. Some experts believe that if this happens, we would lose the battle against climate change. But it is not all doom and gloom.

There is still hope for the Amazon rainforest. Through studies conducted over the past several decades, researches have found that rainforests may be able to survive human-caused destruction even without human help. A rainforest can start growing again if it has enough seedlings. However, this can only be successful if the rainforest isn't always under attack. So what can you do to help?

1. The destruction of the Amazon rainforest is mainly caused by         .
A.human activitiesB.climate changeC.atmosphere pollutionD.the government
2. What will NOT be the result of the disappearance of the Amazon rainforest?
A.The variety of species will decrease.B.Some important medicine may be lost.
C.We cannot get some food from the rainforest.D.The speed of climate change will slow down.
3. What is the author's attitude towards the future of the Amazon rainforest?
A.Disappointed.B.Hopeful.C.Pessimistic.D.Indifferent.
4. What will probably be talked about in the next paragraph of this article?
A.Previous studies of tropical rainforests.B.Serious attacks made by human beings.
C.Individual's actions to protect the rainforest.D.Various reasons for the damage to the rainforest.
20-21高一下·浙江·期中 查看更多[4]

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【推荐1】In 2013 alone at least 20,000 African elephants were killed for their teeth. In South Africa over the last two years more than 2,200 rhinos were killed for their horns. These numbers are alarming, because current rates of illegal hunting are faster than birth rates, which could lead to extinction for these ecologically important creatures in their environment. Indeed, some elephant and rhino populations are on track to be locally extinct within the next decade.

If you are reading this, you may already be aware of these facts. But you might not know that wildlife trafficking (走私) not only threatens the existence of elephants and rhinos but is also leading to extinction of other species, such as tigers, tortoises, sea turtles—and the world’s most trafficked mammal—pangolins (穿山甲).

Pangolins are the only mammals that are entirely covered in tough scales (),which makes them look very strong. But actually they are endangered mammals. There are eight different species of pangolins, four in Asia and four in Africa, and all are threatened with extinction. Although pangolins are protected throughout most of the countries where they live, high demand in East Asia, where the delicious pangolin meat is considered a delicacy and where their scales are used in traditional medicines, is driving an illegal trade in both live animals and pangolin parts. The number of pangolin trafficking is shocking. Experts believe that over the last 10 years more than 1 million pangolins were taken from the wild. It is estimated that between 40,000 and 81,250 pangolins were killed for the illegal trade in 2013 alone.

In February, the United States released a plan to deal with wildlife trafficking, which lays out the steps we will take to fight the illegal trade in wildlife, including pangolins. We are strengthening the carrying out of the plan; building international cooperation and contribution to protect wildlife; raising awareness to drive down the demand that is fueling the illegal trade.

Get involved and remember World Wildlife Day (March 3) by spreading the plan. Use social media and tell everyone that now is the time to get serious about wildlife crime and end the demand that threatens species, big and small, from the huge elephant to the shy pangolin.

1. How many endangered creatures are mentioned in the passage?
A.4.B.5.
C.6.D.7.
2. Which of the following is TRUE according to Paragraph 3?
A.Eight species of pangolins live on the same continent.
B.Pangolins are not protected in most of their natural habitats.
C.The scales of pangolins can be used as an ingredient for cooking.
D.High demand contributes to the illegal trade of pangolins in East Asia.
3. What can we know about the plan released by the US?
A.Social media will be used to spread World Wildlife Day.
B.Whether the plan will be worked out remains to be seen.
C.The demand leading to the illegal trade in East Asia is to be brought down.
D.The US will work together with other countries to protect wildlife.
4. What is the author’s intention of writing the passage?
A.To inform us something about World Wildlife Day.
B.To raise awareness of protecting endangered wildlife.
C.To explain why pangolins are illegally traded in East Asia.
D.To show how the United States is to fight the illegal trade in wildlife.
2018-11-20更新 | 184次组卷
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【推荐2】Since I was born and brought up in a rural town, I have a great interest in nature. Using the chance of studying abroad in my second year at college, I decided to go to Canada just because I wanted to see the beautiful phenomena there So after I finished the study program, I went to Yellowknife in the Northwest Territories.

I clearly remember the sixth night in Yellowknife. Suddenly my host mother came to my room around 8 p.m. and told me to change clothes and go outside quickly carrying her camera.

The northern lights were flickering (闪烁) in the sky! I was shocked and just stood there with my mouth open. I forgot to take pictures of the mysterious lights.

Since that night, whenever it was sunny, I went outside at night and looked at the sky. It was so cold that I lost all feeling in my hands and feet.

As I took pictures of the northern lights, I came to find a characteristic movement of the lights. They first appear in the north part of the sky and then they gradually come down to the south part of the sky. After that, suddenly, they come in the middle of the north and south only for a while, which is the time when the best northern lights can be seen. Since it is only a few seconds for the northern lights to come down to the middle of the sky, it is very hard to get good pictures.

The stronger the sun acts, the better and stronger the northern lights flicker in the sky. That’s because they come about from the collisions (碰撞) between atmospheric gases and the solar wind. Much more solar wind comes to the earth when the sun is active, which leads to the best northern lights. And the colors of the northern lights depend on the height of the collisions and the kinds of gases.

1. Why did the host mother ask the author to go out?
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A.the host mother didn’t remind him to take the camera
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3. When is the best time to see the northern lights?
A.When they appear in the north part of the sky.
B.When they come down to the south part of the sky.
C.When they are between the north and south.
D.When they rise in the east part of the sky.
4. What does the last paragraph mainly tell us?
A.Ways to take good pictures.
B.The relationship between the sun and the northern lights.
C.The colors of the northern lights.
D.The time of the best northern lights.
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【推荐3】Who would win in a fight, a lion or a tiger? Well, if size has anything to do with the matter, the tiger would win. That’s because tigers are the largest of all cat species. Tigers are not only large, they are also fast. They can sprint as fast as 40 miles per hour for short distances and leap as far as 30 feet horizontally. You might not think that such large, fast, and fierce creatures need help to survive, but they do.

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1. Which of the following is NOT a reason in the article explaining why tigers are hunted?
A.Because tiger skins are worth a lot of money.
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C.Because some tigers attack local villages.
D.Because tigers are hunted for enjoyment by some people.
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C.Because the environment has been changed.
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C.To entertain readers with stories about how tigers hunt and are hunted.
D.To explain to readers why the world’s tiger population is endangered.
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