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题型:阅读理解-阅读单选 难度:0.94 引用次数:137 题号:21410274

After years of debate, gray wolves were reintroduced to Yellowstone National Park. Fourteen wolves were caught in Canada and moved to the park. By 2016, the Yellowstone wolf population had grown to more than 170.

Gray wolves once were seen here and there in the Yellowstone area and other parts of United States, but they were gradually displaced by human development. By the 1920s, wolves had disappeared from the Yellowstone area. They went farther north into the deep forests of Canada, where there were fewer humans around. The disappearance of the wolves had many unexpected results. Deer and elk populations—major food sources(来源)for the wolf—grew rapidly. These animals ate large amounts of plants, which reduced plant diversity(多样性)in the park. With the disappearance of gray wolves, coyote(草原狼)populations also grew quickly. The coyotes killed a great number of red foxes in the park, and completely drove away the park’s beavers(河狸).

As early as 1966, biologists asked the government to consider reintroducing wolves to Yellowstone Park. They hoped that wolves would be able to control the elk and coyote problems. Many farmers were against the plan because they feared that wolves would kill their farm animals or pets.

The government spent nearly 30 years thinking up a plan to reintroduce the wolves. The U. S. Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone. Today, the debate continues over how well the gray wolf is fitting in at Yellowstone. Elk, deer, and coyote populations are down, while beavers and red foxes have made a comeback. The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.

1. What does the underlined word “displaced” in paragraph 2 mean?
A.Killed one by one.B.Separated from relatives.
C.Forced to move out.D.Followed secretly.
2. Which is an unexpected result of the disappearance of gray wolves?
A.The number of deer increased fast.B.More people moved into the park.
C.Red foxes ate too many plants.D.Beavers in the park were all killed.
3. Biologists suggested the government reintroduce the wolves because _______.
A.they believed it could keep the park back to normal
B.they knew the government was considering that too
C.they were sure it would solve the elk and coyote problems.
D.they thought farmers needn’t worry about animals and pets
4. What is the text mainly about?
A.Wildlife research in the United States.
B.Plant diversity in the Yellowstone area.
C.A war between American farmers and gray wolves.
D.The reintroduction of wolves to Yellowstone Park.
【知识点】 人与动植物 说明文

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【推荐1】Great Activities for Nature Lovers


Hiking

One of the easiest and most accessible ways to get close to nature is by setting out on a good old fashioned hike. Hiking generally doesn't require any fancy equipment or special skills, just a piece of map and a thirst for adventure. This activity can be as relaxing as you make it.


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Why limit yourself to just a day hike when you can have a full weekend for a longer adventure? Backcountry camping involves packing your tent,sleeping gear ,food, and water on your back to set up camp in a remote location. I you’re an experienced hiker and camper ,this is an excellent way to test your survival skills and explore the wilderness.


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Unlike long hikes through the woods , biking allows you to cover more ground and travel farther in nature. Mountain biking typically involves riding up and down steep slopes , between trees , and over rocks. If this sounds too intense or your tires aren't suited for rugged terrain( 地形) , consider taking a road bike on paved trails through forest preserves or along country roads.


Gardening

Contrary to popular belief, you don't have to travel beyond your own backyard to experience the beauty of nature every day. If your personality is less adventurous or your mobility restricted, consider planting a garden to grow your own vegetables , fruit , herbs,or flowers. There's something truly satisfying about mixing up a salad with fresh ingredients you grow yourself. One of the best parts about spending time in gardening is that it doesn't have to break your budget and anyone can do it.

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【推荐2】Pet owners are always concerned about the well-being of their cute friends. But once you’re away from home, there isn’t much you can do. Wouldn’t it be great to have something that could take care of your pet and allow you to interact (互动) with it while you’re out? Petcube Bites is a good choice.


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Martin started trapping when he was nine. He makes a pretty good living by trapping animals like rabbits, foxes, etc. He traps enough animals to make up for low fur prices. “    2     I can make up for low fur prices by bringing in more than the average trapper,” he said. Farmers also hire Martin to trap annoying animals. He receives two dollars for each gopher he traps. The Department of Natural Resources has also contracted with Martin. About twelve times a year, he traps beavers that have destroyed private land.

    3     For example, his home is filled with animal skins. It’s also not easy. for him to take a day off. State law requires that traps be checked every day. “It can be very hard work,” Martin said.     4     “Then, I spend the rest of the evening skinning animals and preparing for the next day. I really don’t get a day off during trapping season.”

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