1、大学英语六级模拟试卷 225及答案与解析 一、 Part I Writing (30 minutes) 1 Directions: For this part, you are allowed 30 minutes to write a short essay entitled Class Skipping in Universities. You should write at least 150 words following the outline given below 1. 大学生 逃课现象概述 2大学生逃课的原因和影响 3我对这一问题的看法 Class Skipping in Un
2、iversities 二、 Part II Reading Comprehension (Skimming and Scanning) (15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-4, mark： Y (for YES) if the statement agrees with the information given
3、 in the passage; N (for NO) if the statement contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 1 Calories For years now, calories have been all the rage-people are counting them and cutting them, and youd be hard-pressed to find some
4、thing 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
5、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, a common unit of energy used in the
6、 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 f
7、ood 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 exercise when a fitness chart says you burn about 100 calories for every mile you jog, it means
8、 100 kilocalories. For the duration of this article, when we say “calorie,“ we mean “kilocalorie.“ What Calories Do Human beings need energy to survive to breathe, move, pump blood and they acquire this energy from food. The number of calories in a food is a measure of how much potential energy that
9、 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 (集合 ) of these three building blocks. So if you know how many carbohydrates, fats and proteins are in any given food, you know how many calorie
10、s, 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 actu
11、ally 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 an
12、d 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 cal 2g), 16 come from protein(4 cal 4g) and 128 come from carbohydrates (4 cal 32g). Your Calorie Needs Just how many calories do our cells n
13、eed 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 l
14、ess than 2,000 calories. Height, weight, gender, age and activity level all affect your caloric needs. There are three main factors involved in calculating how many calories your body needs per day: Basal metabolic rate (基本新陈代谢率 ) Physical activity Thermic (热的 ) effect of food Your basal metabolic r
15、ate (BMR) is the amount of energy your body needs to function at rest. This accounts for about 60 to 70 percent of calories burned in a day and includes the energy required to keep the heart beating, the lungs breathing, the kidneys functioning and the body temperature stabilized. In general, men ha
16、ve a higher BMR than women. The second factor in the equation, physical activity, consumes the next highest number of calories. Physical activity includes everything from making your bed to jogging. Walking, lifting, bending, and just generally moving around burns calories, but the number of calorie
17、s you burn in any given activity depends on your body weight. The thermic effect of food is the final addition to the number of calories your body burns. This is the amount of energy your body uses to digest the food you eat it takes energy to break food down to its basic elements in order to be use
18、d by the body. To calculate the number of calories you expend in this process, multiply the total number of calories you eat in a day by 0.10, or 10 percent. Calories, Fat and Exercise So what happens if you take in more or fewer calories than your body burns? You either gain or lose fat, respective
19、ly. An accumulation of 3,500 extra calories is stored by your body as 1 pound of fat fat is the bodys way of saving energy for a rainy day (以备不时之需 ). If, on the other hand, you burn 3,500 more calories than you eat, whether by exercising more or eating less, your body converts 1 pound of its stored
20、fat into energy to make up for the deficit. One thing about exercise is that it raises your metabolic rate not only while youre buffing and puffing(喘气 ) on the treadmill. Your metabolism takes a while to return to its normal pace. It continues to function at a higher level; your body burns an increa
21、sed number of calories for about two hours after youve stopped exercising. Lots of people wonder if it matters where their calories come from. At is most basic, it we eat exactly the number of calories that we burn and if were only talking about weight, the answer is no a calorie is a calorie. A pro
22、tein calorie is no different from a fat calorie they are simply units of energy. As long as you burn what you eat, you will maintain your weight; and as long as you burn more than you eat, youll lose weight. But if were talking nutrition, it definitely matters where those calories originate. Carbohy
23、drates and proteins are healthier sources of calories than fats. Although our bodies do need a certain amount of fat to function properly an adequate supply of fat allows your body to absorb the vitamins you ingest an excess of fat can have serious health consequences. The U. S. Food and Drug Admini
24、stration recommends that a maximum of 30 percent of our daily calories come from fat. So, if you eat 2,000 calories a day, thats a maximum of 600 calories from fat, or 67 grams of fat, per day. However, many doctors and nutritionists now set the maximum number of fat calories at 25 percent of our da
25、ily caloric intake. Thats 56 grams of fat per day for a 2,000 calorie diet. 2 This passage is mainly about how to solve obesity. （ A） Y （ B） N （ C） NG 3 A calorie is a unit of energy associates with anything containing energy. （ A） Y （ B） N （ C） NG 4 1,000 calories on a food package equals to 1 kilo
26、calorie. （ A） Y （ B） N （ C） NG 5 A gram of fat has more calories than a gram of protein, so we need to eat more fat. （ A） Y （ B） N （ C） NG 6 A person might need a _ amount of 2,000 calories to maintain a healthy condition 7 Your basal metabolic rate(BMR) is the amount of energy your body needs to _w
27、hile you are sleep. 8 To calculate the calories expending to digest the food, you can multiply the number of calories you eat by _. 9 To save energy for an unexpected situation, your body stores an accumulation of _. 10 Calories _ will not stop immediately when your exercise is over. 11 According to
28、 many doctors and nutritionists, our maximum daily calorie intake of fat calories is _. Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation
29、 and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer. （ A） The job is not rewarding but challenging. （ B） The job is both challenging and rewarding. （ C） The
30、job has both its strength and weakness. （ D） The job is hard work and the pay is not satisfactory. （ A） He is not that far away if she wants to visit. （ B） He doesnt believe that she will really miss him. （ C） He welcomes her phone calls any time. （ D） He will telephone her as often as he can. （ A）
31、The man should relax for a while. （ B） The man should see a doctor in the library. （ C） It shouldnt take long to write the proposal. （ D） The man should wrap up his books as quickly as possible. （ A） Hell come alone. （ B） Hell just bring his wife. （ C） Hell not go to the party. （ D） Hell just give t
32、he ticket to someone else. （ A） Whether to give Joe her camera. （ B） If she could take care of the camera. （ C） If it will be good weather for photographing. （ D） Whether or not the camera is too large for her. （ A） He thinks the woman is fussy. （ B） He didnt realize the problem. （ C） The woman shou
33、ld put up with the noise. （ D） He thinks it is noisy only sometimes. （ A） The restaurant is losing money. （ B） The restaurant should close down. （ C） The restaurant is neither losing money nor gaining. （ D） The restaurant is making money despite the fact that it has not many customers. （ A） She can
34、find a way out. （ B） What the man said is logical. （ C） What the man said is illogical. （ D） She agrees to what the man said. （ A） How to save your money. （ B） Where to make a phone call. （ C） How much phone calls cost. （ D） How to make cheaper phone calls. （ A） At 5:30. （ B） At 6:00. （ C） Before 6:
35、 00. （ D） After 6: 00. （ A） The man. （ B） The operator. （ C） The womans brother. （ D） Telephone directory. （ A） Conservative. （ B） Feminist. （ C） Housewife. （ D） Politician （ A） The woman approves of the movement. （ B） The movement does have harm to the society. （ C） The woman doesnt care that movem
36、ent. （ D） The demonstrations were always peaceful （ A） She loves her family. （ B） She hates politics. （ C） Men are interested of that. （ D） She thinks that is not her business （ A） They love each other. （ B） They hate each other. （ C） They are not very good friends. （ D） Not of above all Section B D
37、irections: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. （ A） To eat more.
38、（ B） To hide in the snow. （ C） To hide in the water. （ D） To grow new, thicker fur in the fall. （ A） In summer. （ B） In autumn. （ C） In early winter. （ D） In late summer. （ A） The body temperature drops and the heartbeat and breathing slow down. （ B） The body temperature drops and the heartbeat stop
39、s. （ C） The body temperature rises and breathing speeds up. （ D） The body movements decrease and the heartbeat slows down. （ A） Britains Secretary of State for Foreign Trade. （ B） Britains Secretary of State for Trade and Industry. （ C） Britains Secretary of State for Investment. （ D） Britains Secre
40、tary of State for Commerce. （ A） The U.S. （ B） The U.K. （ C） China. （ D） Japan. （ A） Only the U.K. （ B） Only China. （ C） Both the U.S. and China. （ D） Both the U.K. and China. （ A） 32. （ B） 36. （ C） 34. （ D） 38. （ A） 16. （ B） 12. （ C） 15. （ D） 18. （ A） Because the students may get degree more easily
41、. （ B） Because the students may get some credits from such positions. （ C） Because the students may get rid of the pressure and strain of study. （ D） Because the students may benefit from such positions in their future careers. （ A） How an American university student gets a degree. （ B） Students wor
42、k for a degree and their activity in student affairs. （ C） The functions of student organizations. （ D） How to apply for a postgraduate study. Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its
43、general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact wo
44、rds you have just heard or write down the 36 Meteor-psychologists (气象心理学家 ) are concerned with how the weather【 B1】_ the behavior of people. One area of their concern is ion (离子 ) balance. Ions are electric charges that exist in the【 B2】 _ , in the air that we breathe. Ions are either positive or ne
45、gative. In one cubic【 B3】 _ of air there are about 2,000 ions. In the air there are more positive ions than negative ones, the ratio being about 4 negative ions to 5 positive ions. Meteor-psychologists are【 B4】 _ concerned about two things related to ions. One thing is the balance or ratio between p
46、ositive and negative ions. When the total number of negative ions【 B5】 _ , or when the 4 to 5 ratio changes, peoples behavior may also change. Meteor-psychologists have found that when there are too many positive ions in the air, some people tend to become more【 B6】 _ , more upset, more【 B7】 _ . Whe
47、n there is a high【 B8】 _ of positive ions in the air, accidents and crimes are more likely to happen. The second area of concern is the total number of ions in the air.【 B9】_ .This reduction in the number of ions tends to make some people feel more depressed.【 B10】 _ .More people visit doctors durin
48、g those times. Meteor-psychologists are beginning to understand the connection between ions and health.【 B11】 _ . 37 【 B1】 38 【 B2】 39 【 B3】 40 【 B4】 41 【 B5】 42 【 B6】 43 【 B7】 44 【 B8】 45 【 B9】 46 【 B10】 47 【 B11】 Section A Directions: In this section, there is a short passage with 5 questions or i
49、ncomplete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words. 47 The study of animals in parks and in wild has given a deeper knowledge of their habits: the result has been a great improvement in the way they are treated, housed and bred. For example, most animals are now kept in groups because it ha
