听力材料：
　　Questions 1 ~ 10 :
　　There are several places in the world that are famous for people who live for a very long time. Theses places are usually mountainous areas, faraway from modem cities. Doctors, scientists and public health experts of ten travel to these regions to solve a mysterious long healthy life; the experts hope to bring to the modem world the secrets of longevity.
　　Hunza is high in the Hymalayan Mountains of Asia. There, many people over one hundred years of age are still in physical health. Men of ninety are new fathers, and women of fifty still have babies. What are the reasons for this good health? Scientists believe that the people of Hunza have these three benefits: first, physical work, usually in the fields or with animals; second, a healthy environment with clean air and water; and what' s more, a simple diet high in vitamins and nutrition but low in fat, cholesterol, sugar and chemicals.
　　People in the Caucasus Mountain in Russia are also famous for their longevity. In this area, there are amazing examples of very long-lived people. Birth records are not usually available, but a woman called Tsurba probably lived until age 160; a man called Shirali probably lived until 168. His widow was 120 years old. In general, people not only live a long time, but they also live well. They are almost never sick, and when they die, they have not only their own teeth but also a full head of hair and good eyesight. Vilcabamba, Ecuador, is another area famous for the longevity of its habit-ants. This region--like HunZa and the Caucasus--is also in high mountains, faraway from cities. In Vilcabamba, too, there is very little disease. One reason for the good health of the people might be the clean, beautiful environment :the temperature is about 70 Fahrenheit all year long; the wind always comes from the same direction; and the region is rich in flowers, fruits, vegetables and wildlife.
　　In some ways, the diets of the habitants in the three regions are quite different. Hunzukuts eat mainly raw vegetables, fruit (especially apricots),and chapattis--a kind of pancake; they eat meat only a few times a year. The Caucasian diet consists mainly of milk, cheese, vegetables, fruit and meat; most people there drink the local red wine daily. In Vilcabamba, people eat a small amount of meat each week, but the diet consists largely of grain, corns, beans, potatoes and fruit.
　　Experts find one surprising fact in the mountains of Ecuador. Most people there, even the very old, consume a lot of coffee, drink a large amount of alcohol, and smoke forty to sixty cigarettes daily.
　　However, the diets are similar in two general ways : first, the fruits andvegetables that the inhabitants of the three areas eat are all natural; that is,they contain no chemicals and second, the people consume fewer calories than people do in the other parts of the world. A typical North American
　　takes in an average of 3,300 calories every day; a typical inhabitant of these mountainous areas between 1,700 and 2,000 calories.
　　Inhabitants in the three regions have more in common calories, natural food, their mountains and their distance from modem cities, because these people live in countryside and are mostly farmers, their lives are physically hard. Thus, they do not need to go to health clubs because they get a lot exercise in their daily work. In addition, although, their lives are hard, the people do not seem to have the worries of city people. Their lives are quiet. Consequently, some experts believe that physical exercise and freedom from worry might be the two most important secrets of longevity.
　　Questions 11 ~ 13 :
　　M : I really don' t know what to do this summer. I can' t afford to just sit a-
　　round, and there don' t seem to be any jobs available.
　　W:Why don' t you try house-sitting? Last summer my friend Sally house-sat for the Gammons when they went away on vacation. Mrs. Gammonhired Sally to stay in their house because she didn! t want it left empty.
　　M: You mean the Gammons paid Sally just to live in their house?
　　W:It wash' t easy. She had to mow the lawn and water the house plants. And when Jodi house-sat for Mr. Johnson, he had to take care of his pets.
　　M:House-sitting sounds like a good job. I guess it' s a little like baby-sit-
　　ting-except you' re taking care of a house instead of children.
　　W:The student employment office s011 has a few jobs posted.
　　M:Do I just have to fill out an application?
　　W:Sally and Jodi had to interview with the homeowners and provided three
　　references each.
　　M: That seems like a lot of trouble for a summer job.
　　W :Well, the homeowners want some guarantee so that they can trust the house-sitter. You know, they want to make sure you're not the type who' 11 throw wild parties in their house, or move a group of friends in with you.
　　M : House-sitters who do that sort of thing probably aren' t paid then.
　　W: Usually they' re paid anyway just because the homeowners don' t want to make a fuss. But if the homeowner reported it, then the house-sitter wouldn't be able to get another job. So if the homeowner reported it, then the house-sitter wouldn' t be able to get another job. So why don' t you apply?
　　M:Yeah, I think I will.
　　Questions 14 ~ 16:
　　M :Did you hear about the air crash that occurred in South America recently?
　　It was quite a tragic accident!
　　W:No, I didn't see anything in the news about it. What happened?
　　M : A foreign airliner was attempting to land at night in a mountainous area in
　　Argentina and flew into a hill!
　　W :That sounds really terrible! Did anyone survive?
　　M :No, everyone aboard, including the crew, was killed instantly.
　　W:What were the circumstances? Were they bad weather, a fire, or engine
　　failure ?
　　M:Apparently, there were some low clouds in the area, but mostly it was just miscommurtication between the pilots and the air traffic controllers.
　　W: Weren' t they both speaking in English, the official international aviation
　　language?
　　M :Yes they were, but the transition from poor quality radios was slightly distorted and the accents of the Spanish speaking controllers was so strong that the pilots misunderstood a vital instruction.
　　W:How could a misunderstanding like that cause such a serious accident?
　　M:The pilots were told to descend to 22,000 feet. The instruction actually meant 22,000 feet, but they thought they heard descend 2,000 feet. That' s a huge difference, and it should have been confirmed, but it was not. Unfortunately, the terrain of the mountains in Norweija ascend to2,000 feet.
　　W:So the pilots did descend to the wrong altitude then, because they were following the air controller' s instructions.
　　M:Sadly enough, yes they did. It was a really bad mistake. Many people died as a result of the simply misunderstanding.
　　W:Wow., that' s a powerful lesson on how important it can be to accurately communicate with each other.
　　Questions 17 ~ 20 :
　　Now, .let me first give you a brief introduction to the American poet, Emily Dickinson. Emily Dickinson was America' s best-known female poet and one of the foremost authors in American literature. Born in Amherst, Massachusetts, Dickinson was the middle child of a prominent lawyer and one-term United States congressional representative, Edward Dickinson, and his wife, Emily Norcross Dickinson. From 1840 to 1847 she attended the Amherst Academy, and from 1847 to 1848 she studied at the Mount HolyokeFemale Seminary (now Mount Holyoke College) in South Hadley, a few trips to Boston for eye treatments in the early 1860s, Dickinson remained in Amherst, living in the same house on Main Street from 1855 until her death. During her lifetime, she published only about 10 of her nearly 2,000 poems, in newspapers, Civil War journals, and a poetry anthology. The first volume of Poems of Emily Dickinson was published in 1890, after Dickinson' s death.
　　Although few of Dickinson' s poems were formally published during her life time, she herself "published" by sending out at least one-third of her poems in the more than 1,000 letters she wrote to at least 100 different correspondents. Dickinson' s method of binding about 800 of her poems into 40manuscript books and distributing several hundred of them in letters is now widely recognized as her particular form of self-publication. She also read her poems aloud to several people, including her cousins Louise and FrancesNorcross, over a period of three decades.
　　Well, that' s all about her life. Now shall we concentrate on her famous poem, "Success is Counted Sweetest".
　　Questions 21 ~ 30:
　　W:Dr. Huber, when did you first become interested in physics and music?
　　M:I can' t remember a time when I wasn' t interested in physics. When 1was a child, I was very curious about the world around me. For example, I always wondered why light behaves the way it does. I found i! more fun to play with a prism than to play with the kids in the neighbor-hood. I wasn' t very social, but I was really into figuring out how things worked. I got my own telescope when I was eight years old, and I loved to take it out at night and go star gazing. I would look at the planets and stars and wonder what was out there. When I was ten. my father bought
　　me a book on the universe, and I just ate it up. In fact, I still have that book right here in my office.
　　It was the same with music. I' ve always had a natural ear for music, perfect pitch. Even as a young child, if I heard a song on the radio, I could go right to the piano and play it. When I heard a sound like the ring of a telephone, I could identify its pitch and play the note on the piano. However, I didn' t develop a serious interest in becoming a pianist until ! was in college. I also seemed to do well in school in the visual arts like painting and drawing.
　　W :What commonality do you see between music and physics?
　　M:There is a common misconception that art and science are completely separated from each other. I think the distinction is artificial. In reality, art and science are not as mutually exclusive as one might assume. Solving a complicated mathematical problem, for example, can require the same degree of creative thinking as painting a landscape or writing a poem. I feel an indefinable tingle when I play the Schumann Concerto or dance the pas de deux from Romeo and Juliet. I get that the same tingle from theoretical physics.
　　The beauty of art is readily apparent to most people. However, in the case of theoretical physics, the beauty is not nearly as accessible to the general public, but it is every bit as exciting. Nature seems to follow certain principles, very much the same as art does.
　　It's not uncommon for physicists to become accomplished musicians. Music theory is a very mathematical discipline. Relationships among various notes in classical harmony are based on simple mathematical relationships.
　　W:You have said that physics is beautiful. What makes it beautiful to you?
　　M: To me, it' s incredible the way nature seems to work so perfectly. I think it is beautiful. I always tell my students on the first day of class. "If you like reading Sherlock Holmes detective stories, you' I1 like doing physics problems. " Physics is about figuring things out--discovering how they work, just like a detective.
　　A lot of people fear physics because they view it as a big complicated jumble of facts that have to be memorized. But that' s not true. It' san understanding of how nature works, how the various parts interact. One can view art and literature as the relationships and interactions of ideas. In the same way, physics studies the relationships and interactions of concepts. In other words, to me art and science fundamentally attempt to achieve the same objective--understanding of the world around us!
　　The whole universe seems to follow some very basic principles as it evolves in with time, some of these principles including the Conservation of Energy and the Conservation of Angular Momentum. The conservation laws of physics are like non-interest bearing checking accounts. In the case of energy conservation, you can make energy deposits and energy withdrawals, but all the energy is accounted for.
　　The rotation of objects is governed by a law called the Conservation of Angular Momentum, which applies to everything in the universe including the rotation of stars, the rotation of the planets and their orbits, the behavior of an electron in an atom, the spin of a figure skater, and the rotation of wheels on a truck. What it all comes down to in the end is that everything in the universe fits together like the pieces of a perfect puzzle. As Einstein said, "The most incomprehensible thing about the universe is that it is comprehensible. "