六级模拟试题(含答案).doc

大学英语六级测试1Part WritingDirections: For this part, you are allowed 30 minutes to write a composition on the topic. You should write at least 150 words:Living alone or Living with Roommates1.有人认为大学里应独自生活2.另一些认为大学里应与别人同住3.你的看法Part II Reading Comprehension (Skimming and scanning) (15 minutes)Directions: In this part, you will have 15 minutes to go over the passages quickly and answer the questions on Answer Sheet 1.For questions 1-7, choose she best answer from the four choices marked A),B),C)and D).For questions 8-10,complete the sentences with the information given in the passage.Calories For years now, calories have been all the ragepeople are counting them and cutting them, and youd be hard-pressed to find something at the supermarket that does not list its calories per serving somewhere on the package. But have you ever wondered what exactly a calorie is? What is a Calorie? A calorie is a unit of energy. We tend to associate calories with food, but they apply to anything containing energy. For example, a gallon (about 4 liters) of gasoline contains about 31,000,000 calories. Specifically, a calorie is the amount of energy, or heat, it takes to raise the temperature of 1 gram of water 1 degree Celsius (1.8 degrees Fahrenheit). One calorie is equal to 4.184 joules (焦耳), a common unit of energy used in the physical sciences. Most of us think of calories in relation to food, as in This can of soda has 200 calories. It turns out that the calories on a food package are actually kilocalories (1,000 calories=1 kilocalorie). The word is sometimes capitalized to show the difference, but usually not. A food calorie contains 4,184 joules. A can of soda containing 200 food calories contains 200,000 regular calories, or 200 kilocalories. A gallon of gasoline contains 31,000 kilocalories. The same applies to exercisewhen a fitness chart says you burn about 100 calories for every mile you jog, it means 100 kilocalories. For the duration of this article, when we say calorie, we mean kilocalorie What Calories Do? Human beings need energy to surviveto breathe, move, pump bloodand they acquire this energy from food. The number of calories in a food is a measure of how-much potential energy that food possesses. A gram of carbohydrates(碳水化合物) has 4 calories, a gram of protein has 4 calories, and a gram of fat has 9 calories. Foods are a compilation of these three building blocks. So if you know how many carbohydrates, fats and proteins are in any given food, you know how many calories, or how much energy, that food contains. If we look at the nutritional label on the back of a packet of maple-and-brown-sugar oatmeal, we find that it has 160 calories. This means that if we were to pour this oatmeal into a dish, set the oatmeal on fire and get it to burn completely (which is actually pretty tricky), the reaction would produce 160 kilocalories (remember: food calories are kilocalories)enough energy to raise the temperature of 160 kilograms of water 1 degree Celsius. If we look closer at the nutritional label, we see that our oatmeal has 2 grams of fat, 4 grams of protein and 32 grams of carbohydrates, producing a total of 162 calories (apparently, food manufacturers like to round down). Of these 162 calories, 18 come from fat (9 cal2g), 16 come from protein (4 cal4g) and 128 come from carbohydrates (4 cal32g). Our bodies burn the calories in the oatmeal through metabolic (新陈代谢的) processes, by which enzymes (酵素) break the carbohydrates into glucose (葡萄糖) and other sugars, the fats into glycerol (丙三醇) and fatty acids and the proteins into amino acids (氨基酸).These molecules are then transported through the bloodstream to the cells, where they are either absorbed for immediate use or sent on to the final stage of metabolism in which they are reacted with oxygen to release their stored energy. Your Caloric Needs Just how many calories do our cells need to function well? The number is different for every person. You may notice on the nutritional labels of the foods you buy that the percent daily values are based on a 2,000 calorie diet. 2,000 calories is a rough average of what a person needs to eat in a day, but your body might need more or less than 2,000 calories. Height, weight, gender, age and activity level all affect your caloric needs. There are several factors that regulate how many calories we need each day. Some of these considerations are your metabolic rate (新陈代谢率), physical activity level and thermic (热的) effect of food, sleep patterns, age, gender, body mass and body size. To determine your caloric intake value for building mass, multiply your body weight by 24, while multiplying your body weight by 17 to determine your approximate maintenance level caloric intake. The main function of carbohydrates is to be a source of energy for the body. In the end, energy drawn from the breakdown of glucose and glycogen (肝糖) is used to fuel muscular contractions as well as provide a protein sparing effect. Unlike the other macro-nutrients, proteins contain nitrogen (氮) which is important in the formation of new muscle tissue. The human body requires 22 different amino acids, which are found in protein, and can be classified as either essential or non-essential. Essential amino acids cant be synthesized in the body, while non-essential amino acids can be. Under normal conditions, protein serves an important role in the maintenance, repair, and growth of body tissues. Proteins make up about 15% of your total body mass and have several roles in the body. Proteins also regulate the acid/base quality of body fluids and are necessary for muscle contractions, hormone production, and the activation of metabolic processes. In the human body, fat provides the largest store of potential energy, produces hormones, strengthens cell structures, transmits nerve impulses and provides insulation (绝热) from cold environments. Fats actually contribute to about 50% of the energy required during light and moderate exercise, and this percentage rises as the work period is prolonged. Calories, Fat and Exercise So what happens if you take in more or fewer calories than your body bums? You either gain or lose fat, respectively. An accumulation of 3,500 extra calories is stored by your body as 1 pound of fatfat is the bodys way of saving energy for a rainy day. If, on the other hand, you bum 3,500 more calories than you eat, whether by exercising more or eating less, your body converts 1 pound of its stored fat into energy to make up for the deficit. One thing about exercise is that it raises your metabolic rate not only while youre huffing and puffing (喘不过气来) on the treadmill (踏车). Your metabolism takes a while to return to its normal pace. It continues to function at a higher level; your body bums an increased number of calories for about two hours after youve stopped exercising. Lots of people wonder if it matters where their calories come from. At its most basic, if we eat exactly the number of calories that we bum and if were only talking about weight, the answer is no a calorie is a calorie. A protein calorie is not different from a fat caloriethey are simply units of energy. As long as you bum what you eat, you will maintain your weight; and as long as you bum more than you eat, youll lose weight. But if were talking nutrition, it definitely matters where those calories originate. Carbohydrates and proteins are healthier sources of calories than fats. Although our bodies do need a certain amount of fat to function properlyan adequate supply of fat allows your body to absorb the vitamins you ingestan excess of fat can have serious health consequences.1. As a unit, what does calorie apply to? A. Food. B. Anything containing energy. C. A gallon of gasoline. D. Exercise.2. 100 calories in a can of soda equals to _.A. 200,000 regular calories B. 200 kilocaloriesC. 100 kilocalories D. 4,184 joules3. If you know how many carbohydrates, fats and proteins are in any given food, you know A. how much energy that food containsB. the compilation of these three building blocksC. how the energy is acquiredD. where does the food come from4. Through which way does the enzymes break the proteins into amino acids? A. Transportation of the molecules. B. Consumption of the calories.C. Metabolic processes. D. The final stage of metabolism.5. A person might need _ calories to maintain a healthy condition in a day. A. no less than 2,000 C) more than 2,000 B. less than 2,000C. more than 2,000 D. roughly about 2,0006. Your caloric intake for building mass is determined by _. A. multiplying your body weight by 24 B. multiplying your body weight by 17C. your metabolic rate, physical activity level and thermic effect of food D. your sleep patterns, age, gender, body mass and body size7. What has a significant position in the growth of human body tissues? A. Essential amino acids. B. Non-essential amino acids.C. Fat. D. Proteins.8. To save energy for an unexpected situation, your body stores an accumulation of _.9. Calories _ will not stop immediately when your exercise is over.10. The _ of those calories is of significance when nutrition is taken into consideration.Part Listening ComprehensionSection AQuestions 11 to 18 are based on the conversation you have just heard.11. A. The man should sleep for a while. B. The man should finish the job right now. C. The man should try to concentrate on the job.D. The man should get some exercises.12. A. Go to check the dining hall again.B. Borrow her book.C. Ask about the book at the information desk.D. Buy a new one.13. A. Make her topic much more general.B. To focus on a narrower topic.C. Change to an entirely new topic.D. Rewrite her research paper.14. A. The mans wife should try to be more understanding.B. The depression of the mans wife may he the result of her past experiences. C. The mans negative attitude may be derived from his childhood. D. It is easy for the man to help his wife out of pessimism. 15. A. $450. B. $750 C. $600. D. $800.16. A. He was always late to work.B. He got furious with his boss last week.C. He made a serious mistake in a financial problem.D. He wanted to take car e of his wife.17. A. A fight. B. A traffic accident.C. A sandstorm. D. An earthquake.18. A. She disagrees with father.B. She wants to live in the suburbs.C. She turns a deaf ear to her husbands words.D. She is offendedQuestions 19 to 21 are based on the conversation you have just heard.19. A. A magazine. B. The city of Chicago.C. The electronics industry. D. Their travel.20. A. Sales Department.B. Research and Development Department.C. The Personnel Department.D. Advertising Department.21. A. Making new discoveries in the electronics industry.B. Designing printers.C. Selling printers.D. Looking for successful products and find out the reasons.Questions 22 to 25 are based on the conversation you have just heard.22. A. In a concert hall. B. In the National Palace Museum. C. At an exhibition. D. On the plane.23. A. For some superstitious reasons. B. Only for decoration. C. The emperor liked it. D. For the covering of the nails.24. A. Yellow. B. Red. C. Green. D. Black. 25. A. In the Qing Dynasty. B. In the 19th Century. C. In the Song Dynasty. D. In the 16th Century.Section BPassage OneQuestions 26 to 28 are based on the passage you have just heard.26. A. They were small. B. They were fuel-efficient.C. They were oil consuming. D. They were not attractive.27. A.They couldnt get enough income to keep them running.B. Young people couldnt afford to pay the tuition fees. C. Keeping them running at the same level would cast much more. D. Social services need more state funds because of the recession.28. A. Young people couldnt afford their own tuition in the 1970s. B. Fewer parents could afford to send their children to college in the 1970s. C. Its difficult for graduates from colleges to find a job in the 1970s. D. Institutions of higher education depend mainly on government in the 1970s.Passage TwoQuestions 29 to 31 are based on the passage you have just heard.29. A. Uniform style. B. Wide coverage.C. Speed in reporting news. D. Popularity.30. A. People are rarely interested in the same kind of news.B. People have different views about what a good newspaper is. C. People scan for the news they are interested in. D. Different people prefer different newspapers.31. A. It tries to .serve different readers.B. It has to cover things that happen in a certain locality.C. Readers are difficult to please.D. Readers like to read different newspapers.Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.32. A. Right handers are more likely to have mental mistakes.B. Left handers are more liable to have accidents.C. Left handers are more skillful in handling things.D. Right handers get tired easily.33. A. It is interesting and exciting. B. It is perfect without any limitations. C. It is supported by the government. D. Its conclusion can be universally accepted.34. A. They lost their way. B. They forgot what they were doing.C. They were sleepy. D. They had mental mistakes.35. A. Most equipment was designed for fight handers. B. Their mental stress led to their lack of concentration. C. They were careless. D. They were slow in responding.Section CWith the recent rapid advances in information technologies, educational researchers at every level and in every (36) have developed new methods, tools, and (37) for instruction. Their general purpose is to make the educational process teaching and learning sound much more scientific and modem. As the Internet, email and (38) have already become parts of most college students lives and studies nowadays; (39) these new information technologies to engineering and science instruction is a great (40) for teachers and researchers. Although the effectiveness and (41) of new information technologies on education m not yet well comprehended and (42) , the promises and (43) they hold for improving education are exciting. For example, (44) _. By the networks, teaching and learning are no longer confined to the classrooms. Students at home and in work places can have access to learning material at any time, which makes their studying process become easier and more convenient. (45) . Students can work on learning materials at their own pace and discuss them with other people when they have questions. (46) _.Part Reading Comprehension (Reading in Depth)Section A Directions:Inthissection,thereisashortpassagewith5questionsorincompletestatements.Readthepassagecarefully.ThenanswerthequestionsorcompletethestatementsinthefewestpossiblewordsonAnswerSheet. The bacteria that cause a common food-borne illness show low drug resistance in Australia, unlike similar strains from the United States and Europe, a study has found. Scientists behind the finding say Australias de facto ban on certain antibiotics in poultry (家禽) and other livestock helps explain why. In this study, researchers analyzed samples of Campylobacter jejuni(空肠弯曲杆菌) bacteria from 585 patients in five Australian states. Scientists found that only two percent of the samples were resistant to ciprofloxacin (环丙沙星). One of the group of antibiotics known as fluroroquinolonones. By contrast, 18 percent of Campylobacter(弧形形杆菌) sample in U. S. patients areimmunetofluoroquinolonones,whichhavebeenusedintheU.S.topreventortreatrespiratory（呼吸的）diseaseinpoultryforadecade. The study, led by Leanne Unicomb, a graduate student at Australian National University in Canberra, was published in the May issue of the journal Clinical Infections Diseases. Thefindingsaddtothegrowingbodyofevidencesuggestiveoftheproblemsofusingfluoroquinolononesinfood-producinganimals,Unicombwroteinanemail.Campylobacteristhemostcommonfood-bornediseaseintheU.S.andmanyotherindustrializedcountries. People can contract the pathogen(病原体) by consuming undercooked poultry or meat, raw milk, or contaminated(被污染的) water. Symptomsincludefever,vomiting,anddiarrhea(腹).Inrarecases,thediseasecantriggerparalysisordeath. “In most industrial countries Campylobacter is more commonly reported than Salmonella(沙门氏菌), a better-known cause of food poisioning.” Unicomb said. “The number of cases of Campylobacter has been on the rise in Australia since the early 90s.” In the U.S., about 1.4 million people contracted Campylobacter infections lastyear, according to the U.S. Center for Disease Control and Prevention (CDC) in