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发布时间：2006-06-21 21:01     点击：

Q45. How did the speaker acquire all her minerals?

Q46. Why is the speaker proud of her plagioclase feldspars?

Question 47 through 50 A talk in a national park.

Welcome to Yellow Stone National Park. Before we begin our nature walk today, I d like to give you a short history of our national park service. The national park service began in the late 1800s. A small group of explorers had just completed a month long exploration of the region that is now Yellow Stone. They gathered around the campfire and after hours of discussion, they decided that they should not claim this land for themselves. They felt it should be accessible to everyone so they began a campaign to preserve this land for everyone s enjoyment. Two years later, in the late 19century, an act of congress signed by President Ulysses S. Grant, proclaimed the Yellow Stone region a public park. It was the first national park in the world. After Yellow Stone became a public park, many other areas of great scenic importance were set aside. And in 1916 the national park service was established to manage these parks. As a park ranger, I am an employee of the national park service. In the national park, park rangers are on duty at all the times to answer questions and help visitors in any difficulty. Nature walks, guided tours and campfire talks are offered by specially trained staff members. The park service also protect the animals and plants within the parks.

Q47. Who is the speaker?

Q48. According to the speaker, who originated the idea of the public park?

Q49. What does the speaker say about Yellow Stone national park?

Q50. According to the speaker, what is one of the duties of a park ranger？

答案： DABDB BDDBC ADACA CBCDD BBCAD ACAAD

1. (A) He is playing tennis tomorrow.

(B) Someone else has borrowed his racket.

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