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题型:阅读理解-阅读单选 难度:0.65 引用次数:44 题号:8428821

Imagine being face-to-face with a woolly mammoth (猛犸象). It would be quite a sight. Scientists believe it would tower above 11 feet tall. It would have a sloping back, a long, powerful trunk, and sharp, curved tusks that stretch up to 10 feet. Its thick hair would be up to three feet long. It would weigh six tons—about as heavy as a bus.

You’ve probably never seen a giant furry elephant before. Actually, you definitely haven’t. The species has been extinct for thousands of years.

But a few years from now, you might be able to see a woolly mammoth for yourself. Scientists believe they have the technology to recreate it.

A team of South Korean and Russian scientists plan to clone a woolly mammoth. How will they do it?

Several woolly mammoth bodies have already been discovered in Siberia, an icy region in Russia. The scientists plan to take cells from these frozen mammoths. In a laboratory, they’ll use them to create a new cluster (群) of cells called an embryo. The embryo will be placed into the womb of a living female elephant. That elephant will then give birth to a baby woolly mammoth.

The scientists believe the whole process will take five years. Many scientists and animal lovers can’t wait. It will be so exciting to be able to bring a creature that has been extinct for thousands of years back to life. People would travel from around the world for the chance to see a living woolly mammoth. By observing the way the creature looks and acts, scientists might make brand-new discoveries about the history of animal life.

Other experts aren’t so sure about the woolly mammoth project. One big question is what to do with a mammoth. The Earth has changed since these animals walked on the planet. Where would the creature live, and would it be able to survive in today’s climate? Some believe that the money being spent on the experiment could be better spent on other important scientific projects, such as fighting disease.

But the South Korean and Russian scientists are sticking to their plan. They admit they have a big challenge ahead. There is no guarantee that they will succeed, but they’re hopeful.

1. The first paragraph describes the mammoth’s ______.
A.habitatB.food
C.appearanceD.lifespan
2. What is the challenge for scientists to clone a mammoth?
A.Whether they have enough money for the project.
B.Whether the mammoth can adapt to the new environment.
C.Whether the mammoth can survive the modern diseases.
D.Whether their plan wins support from the public.
3. The last paragraph implies that the attitude of scientists to cloning mammoths is ______.
A.indifferentB.approving
C.optimisticD.doubtful
4. What's the main idea of the passage?
A.Scientists are finding ways to deal with mammoths.
B.Scientists try to find out the history of animal life.
C.Scientists plan to bring the mammoth back to life.
D.Scientists are waiting for the return of the mammoth.
【知识点】 动物

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【推荐1】As we "happen to be" the best creature in the world, it's our duty to look after other species. Here are some points which might help to protect wildlife.

Join organizations like Greenpeace and World Wildlife Fund. They have devoted themselves to protecting the earth and its animals. Many volunteers join organizations like these and work for the environment.     1    

    2     Don't buy anything made from ivory or things like this. Baby seals are hunted for their skin, as it is used to make expensive coats. Don't buy them.

    3     You can write a heartfelt and logical letter to the government, stating your ideas about this problem and how it can be solved.

Recycle and reuse. It will reduce the need to have more raw materials to produce something like paper or tissue.     4     And wild animals' home will not be destroyed.

Governments should create more safe zones and national parks for wild animals.     5     Governments should apply strict laws to stop hunting.

I hope you find this post helpful. Share your views about this issue and let your voice be heard.

A.Stop hunting for pleasure.
B.Feedback to the government.
C.As a result, fewer trees will be cut down.
D.You can build a bird house and feed local birds.
E.Refuse fur coats and medicines made from rare animals.
F.You can find some organizations like these and join them.
G.There they will be able to move freely without worrying about hunters.
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【推荐2】Two baby zebra sharks were released in the Raja Ampat Regency of Indonesia earlier this year as the first step in a massive re-wilding project. The new organization, called ReShark, has joined 15 countries and 44 aquariums (水族馆) in an effort to raise zebra sharks, then release them back into the wild. ReShark aims to release 500 zebra sharks in Indonesia n waters within the next five to ten years.

Dr. Erin Meyer, Seattle Aquarium vice president of conservation programs and partnerships, told in an interview that this is just the beginning of creating a shark rebirth. “We’re just getting started in re-wilding the oceans, so we can ensure that we have a flexible, healthy, global ocean for today and for future generations,” she said.

The international organization, which today has 70 partners, aims to restore threatened and endangered sharks around the world. There are currently almost 400 species of sharks worldwide that are badly threatened by the IUCN Red List of Threatened Species, according to Meyer.

The main cause of this decline is overfishing, said Meyer. “We hear a lot about people in-volving in shark fishing for their fins, but they’re also fished for their meat,” she said of sharks. Meyer added that sharks are keystone species within their ecosystems, which means their environments can break down without their keeping other species in check.

ReShark first launched in 2020, beginning with the endangered zebra shark. In parts of the world such as Indonesia, Meyer noted, zebra sharks are nearly extinct. In Raja Ampat, researchers were able to count only three zebra sharks in 15,000 hours of searching between the years 2001 and 2021, according to National Geographic. “They are also a species that aquariums have been learning about and researching while in our care for decades,” Meyer said, explaining why the species was at the top of ReShark’s preference list.

1. Why does ReShark raise zebra sharks?
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1. Why do people want to get rid of the flying foxes?
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