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题型:阅读理解-阅读单选 难度:0.65 引用次数:84 题号:18802514

Although a few recreational snowmobilers (驾驶摩托雪橇者) destroy ecosystems as they ride through the wilderness, most snowmobilers love and respect America’s natural heritage. That’s why they brave the cold to explore what is left of wild America — including Yellowstone National Park. Unfortunately these snowmobilers are unconsciously damaging what they love. Because snowmobiles in the park not only create both air and noise pollution but also strains (使紧张) the already tight budget of the park service, recreational snowmobiles should be banned from Yellowstone National Park.

It may be hard to imagine that about 1,000 snowmobiles a day could lead to air pollution in a park half the size of Connecticut, but in fact they can. In addition to polluting the air, snowmobiles are noisy, disturbing the peace and silence that park visitors have a right to expect. One study reports that twelve snowmobiles traveling together could be heard as far as two miles away. Such noise affects the park’s wildlife.

Funds that should be used to preserve Yellowstone National Park and its wildlife have been used to deal with the snowmobile issue. Also, park rangers are spending an increasing amount of their valuable time policing snowmobilers, which takes away from park rangers’ primary responsibility—preserving this country’s treasured natural resources.

Opponents of a ban argue that a central mission of the park service is to provide access to national parks. Admittedly, winter access is important, but ordinary people can enjoy the park by means other than snowmobiles. Also, the park service’s mission is not just to provide access to the parks; no less important is its mission to preserve the parks’ pristine natural resources for future generations.

Even with a ban on snowmobiling in the park itself, the Yellowstone area would still earn the title of Snowmobiling Capital of America. All of the streets of West Yellowstone, the area’s major town, are open to snowmobilers, and many trails run out of the town. As to Yellowstone National Park, a ban on snowmobiles would allow the park service to devote more of its limited resources to one of its primary missions: the protection of natural resources. Visitors would still be able to appreciate Yellowstone’s beauty— its geysers, its wildlife, and its snow-covered vistas —throughout the park’s long winter.

1. What can we learn about most snowmobilers from paragraph 1?
A.They enjoy winter adventures.B.They try to reduce water pollution.
C.They make a lot of money by snowmobiling.D.They have destroyed the hottest snowmobling spot.
2. What does paragraph 2 mainly talk about?
A.Effects of air pollution.B.Measures of wildlife protection.
C.Rights expected by visitors.D.Problems caused by snowmobiles.
3. What is the primary responsibility of park rangers?
A.Solving snowmobile issues.B.Providing access to the park.
C.Protecting natural resources.D.Collecting funds for the park.
4. Which is the most suitable title for the text?
A.Preserving Yellowstone’s winter wilderness
B.Solving financial problems of national parks
C.Improving the service of Yellowstone National Park
D.Exploring popular snowmobile destinations this winter
【知识点】 环境保护 说明文

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