大学英语六级840及答案解析.doc

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1、大学英语六级 840及答案解析(总分：439.00，做题时间：120 分钟)一、Part I Writing (3(总题数：1，分数：30.00)1.For this part, you are allowed 30 minutes to write a short essay entitled Gambling. You should write at least 150 words following the outline given below in English: 1. What is gambling? 2. The harm of gambling. 3. How shall

2、we deal with it? （分数：30.00）_二、Part II Reading C(总题数：1，分数：71.00)Foods That Fight Disease With remarkable consistency, recent research has found that a diet high in plant-based foodsfruits, vegetables, dried peas and beans, grains, and starchy staples such as potatoesis the bodys best weapon in thwart

3、ing many health related problems. These foods work against so many diseases that the same healthy ingredients you might use to protect your heart or ward off cancer will also benefit your intestinal tract and bones. Heres what is currently known about these different disease-fighting foods. Cancer F

4、ighters Preventing cancer is a compelling reason to lead up your cart in the produce department. Scientists have recently estimated that approximately 30 to 40 percent of all cancers could be averted if people ate more fruits, vegetables, and plant based foods and minimized high-fat, high-calorie ed

5、ibles that have scant nutritional value. Up to 70 percent of cancers might be eliminated if people also stopped smoking, exercised regularly, and controlled their weight. In the past, researchers had linked fat consumption with the development of cancers, but they currently believe that eating fruit

6、s, vegetables, and grains may be more important in preventing the disease than not eating fat. “The evidence a bout a high-fat diet and cancer seemed a lot stronger several years ago than it does now,“ says Melanie Polk, a registered dietitian and director of nutrition education at the American Inst

7、itute for Cancer Research. Although scientists are still not certain about the specifics, theyre beginning to close in on the healthful constituents of plant-based foods. In particular, theyre looking closely at two componentsantioxidants and phytochemicals. Antioxidants. The antioxidants(carotenoid

8、s, such as beta carotene and lycopene, and vitamins C and E) found in fruits, vegetables, and other plant-based foods fight free radicals, which are compounds in the body that attack and destroy cell membranes. The uncontrolled activity of free radicals is believed to cause many cancers. The caroten

9、oids, in particular, which give fruits and vegetables their bright yellow, orange, and red colors, are now gaining recognition for their nutritional worth. Numerous studies have extolled the virtues of lycopene(the carotenoid that makes tomatoes red) in preventing prostate cancer. One such study at

10、Harvard University found that men who include tomato products in their meals twice a week could reduce their risk of developing prostate cancer by one-third compared with men who never touch tomatoes. Other lycopene-rich foods, such as watermelon, red grapefruit, and guava, are now piquing the inter

11、est of researchers. Watermelon not only yields more lycopene per serving(15 mg in 11/2 cups ) than raw tomatoes(11 mg per 11/2 cups), but its also a rich source of vitamins A and C. Can watermelon help reduce the incidence of cancer? No one knows for sure because there havent been sufficient studies

12、. “We assume that well see benefits,“ says Penelope Perkins-Veazie, Ph.D. a research scientist with the USDAs Agricultural Research Service. Researchers there plan to compare people who eat watermelon with those who eat processed tomatoes-because cooking enhances lycopene absorption-to see which gro

13、up absorbs more lycopene.(A 11/2 cup serving of tomato sauce packs 53 mg of lycopene.) Phytochemicals. The phytochemicals present in fruits and vegetables protect the body by stunting the growth of malignant cells. Phytochemicals, naturally occurring substances, include indoles(生化吲哚) in cabbage or c

14、auliflower, sapenins(生化皂角苷) in peas and beans, and isoflavones(异黄酮) in soy milk and tofu. Investigators have only an inkling of how many phytochemicals exist and how they work. They are confident, however, that you can get a basketful of ant-cancer nutrients by mixing and matching at least five serv

15、ings a day of fruits and vegetables with seven or more starchy or protein-rich plant foods such as gains, peas and beans, and potatoes. Supplements can help you get some of the benefits of these substances, but they are no replacement for real food. “When you take a supplement, youre getting specifi

16、c vitamins and minerals, but not the thousands of phytochemicals that might be present in fruits and vegetables,“ says registered dietitian Amy Jamicson of The Cleveland Clinic Foundation in Ohio. “If you eat a sweet potato with its skin, which is a great source of both beta carotene and fiber, youl

17、l consume at least 5,000 phytochemicals that arent present in a beta carotene supplement. Thats a really important difference.“ Bone-Building Foods The road to strong bones is paved with calcium-rich food. Leafy green vegetables and low fat dairy products are excellent sources of calcium, the minera

18、l that puts stiffness into your skeletal system and keeps your bones from turning rubbery and fragile. Your body uses calcium for more than keeping your bones strong. Calcium permits cells to divide, regulates muscle contraction and relaxation, and plays an important role in the movement of protein

19、and nutrients inside cells. If you dont absorb enough from what you eat to satisfy these requirements, your body will take it from your bones. Because your body doesnt produce this essential mineral, you must continually replenish the supply. Even though the recommended daily amount is 1,200 mg, mos

20、t adults dont eat more than 500 mg. One reason may have been the perception that calcium-rich dairy products were also loaded with calories. “In the past, women, in particular, worried that dairy products were high in calories,“ says Letha Y. Griffin, M.D. of Peachtree Orthopaedics in Atlanta. “But

21、today you can get calcium without eating any high-fat or high-calorie foods by choosing skim milk or low-fat yogurt.“ Also, low-fat dairy products contain phosphorous(磷) and magnesium(镁) and are generally fortified with vitamin D, all of which help your body absorb and use calcium. If you find it di

22、fficult to include enough calcium in your diet, ask your doctor about supplements. Theyre a potent way to get calcium as well as vitamin D and other minerals. But theres a downside. If you rely on pills in lieu of a calcium-rich diet, you wont benefit from the other nutrients that food provides. Get

23、ting the recommended vitamin D may be easy, since your body makes the vitamin when your skin is exposed to the suns rays. （分数：71.00）(1).According to this passage, a diet high in plant-based foods plays an important role in fighting all kinds of diseases.（分数：7.10）A.YB.NC.NG(2).The author suggested th

24、at people should eat more fruits, vegetables, and plant-based foods, eat less high-fat, high-calorie foods with insufficient nutritional value, stop smoking, exercise often and control their weight in order to reduce cancer.（分数：7.10）A.YB.NC.NG(3).It is proved that the uncontrolled activity of free r

25、adicals caused many cancers.（分数：7.10）A.YB.NC.NG(4).Researchers say that supplements can completely take the place of real food in the near future.（分数：7.10）A.YB.NC.NG(5).Investigators dont _ how many phytochemicals exist and how they work.（分数：7.10）_(6).A study shows that men who eat tomato products t

26、wice a week could probably avoid developing prostate cancer by one third in comparison with those _.（分数：7.10）_(7).Fruits, such as watermelon, red grapefruit, and guava, are now exciting the interest of researchers because _.（分数：7.10）_(8).If you want to have strong bones you should eat food _.（分数：7.1

27、0）_(9).Calcium permits cells to divide, regulates muscle contraction and relaxation, and plays an important role in the movement of protein and nutrients inside cells besides helping _.（分数：7.10）_(10).Calcium-rich food _ its supplements because it also provides other nutrients like vitamin D and othe

28、r minerals.（分数：7.10）_三、Listening Comprehens(总题数：1，分数：15.00)A.The man thinks traveling by air is quite safe.B.The woman never travels by plane.C.Both speakers feel nervous when flying.D.The speakers feel sad about the serious loss of life.A.At the information desk.B.In an office.C.In a restaurant.D.A

29、t a railway station.A.Write the letter.B.Paint the shelf.C.Fix the shelf.D.Look for the pen.A.It gives a 30% .discount to all customers.B.It is run by Mrs. Winters husband.C.It hires Mrs. Winter as an adviser.D.It encourages husbands to shop on their own.A.Long exposure to the sun.B.Lack of sleep.C.

30、Too tight a hat.D.Long working hours.A.His English is still poor after ten years in America.B.He doesnt mind speaking English with an accent.C.He doesnt like the way Americans speak.D.He speaks English as if he were a native speaker.A.An auto mechanic.B.An electrician.C.A carpenter.D.A telephone rep

31、airman.A.They both enjoyed watching the game.B.The man thought the results were beyond their expectations.C.They both felt good about the results of the game.D.Professor and student.A.Manager and employee.B.Salesman and customer.C.Guide and tourist.D.Professor and student.A.Tom has arranged a surpri

32、se party for Lucy.B.Tom will keep the surprise party a secret.C.Tom and Lucy have no secrets from each other.D.Tom didnt make any promise to Lucy.四、Section A(总题数：2，分数：10.00)A.To the Nile River.B.To the Museum of Natural History.C.To Colorado.D.To Arizona.A.In a boat.B.In a cave.C.In a river.D.In a t

33、ree.A.Find some drift wood.B.Take some photographs.C.Solve a mystery.D.See the canyon.A.To get a library card.B.To get familiar with the resources there.C.To borrow some books he needs.D.To study how to use the computer to locate the books in the library.A.The man used to live in the city.B.The libr

34、ary uses computer systems.C.The woman is ready to help.D.The man is confident of his computer skills.A.A city guide.B.A librarian.C.A computer expert.D.A registrar.五、Section B(总题数：3，分数：10.00)A.The 88th floor, north tower.B.The 78th floor, north tower.C.The 88th floor, south tower.D.The 78th floor, s

35、outh tower.A.He was a relative of the speakers.B.He was a friend of the speakers.C.He eventually made his way out of the building.D.He worked in the south tower of the World Trade Center.A.The firemen came up and stopped them.B.There were a great many people there and they came to a complete stop.C.

36、They were told to stop to make way for the fire fighters.D.They had to help the firemen carry the heavy equipment.A.During the journey down, many people showed care and concern for others.B.It took the speaker much longer than the others to escape from the building because he had an artificial leg.C

37、.The building collapsed immediately after the speaker got out.D.Many people died because they got trapped in elevators.A.How animals survive harsh conditions in the wild.B.How animals alter colors to match their surroundings.C.How animals protect themselves against predators.D.How animals learn to d

38、isguise themselves effictively.A.Its enormous size.B.Its plant-like appearance.C.Its instantaneous response.D.Its offensive smell.A.It helps improve their safety.B.It allows them to swim faster.C.It helps them fight their predators.D.It allows them to avoid twists and turns.A.Use of library faciliti

39、es.B.Library regulations.C.Library personnel.D.Location of the library.A.Book publishers.B.Librarians.C.New university students.D.Faculty members.A.Graduate students.B.Undergraduate students.C.Professors.D.Library employees.六、Section C(总题数：1，分数：10.00)We have all seen such films in which robots are s

40、uperior to man. Compared with those (36) 1 machines, man appears both physically and (37) 2weaker. (38) 3by robots, man is no longer the master of the world. (39) 4by the dark future, some people object to the research on (40) 5intellect. But could the (41) 6ever become reality? I believe the answer

41、 is “no“. Robots are not our enemy, but our friend. We have no reason to be afraid of them. Surely, nowadays, (42) 7robots have replaced men in many aspects. Especially under the working (43) 8too hard or dangerous for human beings, robots perform tasks superbly. (44) 9. However, it is man who tells

42、 them how to apply these. Without program, robots are nothing but a highly complex device. (45) 10. Therefore, no matter how robots may become one day, (46) 11. Then how can a product be the master of its producer? （分数：10.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1

43、:_七、Reading Comprehensio(总题数：2，分数：177.00)During the last three years, many speculated high about the possible intrusions concerning the corporate computing systems and global computing infrastructure. Fortunately, such and many other frightening predictions did not come true. Surely, technology is t

44、he prime reason for this achievement but at the core lies the work environment and the human factor. We have seen that IT leaders in almost all areas have enormously reduced their expenses by adopting winning solutions provided by todays security vendors. Does this mean technology a lone is sufficie

45、nt to deliver? No, in the truest sense, policies, their enforcement, along with education and training provide a winning combination to secure corporate computing. As far as technology is concerned, due credit goes to security vendors and service providers for shielding users in many ways, from desk

46、top antivirus software to integrated security appliances. Also, myths about the role played by operating systems in security have finally died out. Almost all OS(计算机操作系统)vendors(供应商) such as Microsoft, IBM, Sun, Red Hat, etc. have earned trust and recognition with their installed systems, suggesting that security is not a feature of an operating system. The recently conducted 2003 Info World Security Survey of more than 500 IT executives and strategists reveals that around 49 percent of reader respondents felt confidence in their systems-performance with 52 percent observing fewer than 10