大学英语四级224及答案解析.doc
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1、大学英语四级 224及答案解析(总分:746.58,做题时间:130 分钟)一、Writing (30 minutes)(总题数:1,分数:30.00)1.A recent investigation shows that about 80 percent of pupils have private tutors. In this part, you are to write a composition of 120 words about The Advantages and Disadvantages of Private Tutoring.(分数:30.00)_二、Reading Co
2、mprehensio(总题数:1,分数:71.00)Fish Oil Much has been made of the benefits of oil derived from fish. It is claimed that people with a diet rich in fish oil have a greatly reduced chance of heart disease and arteriosclerosis. In addition, it has been shown conclusively that people suffering from elevated
3、blood lipids react positively to treatment using fish oils. limits Diet and Diseases The advantages of fish oil became apparent after studies some two decades ago of the diet of the Inuit, or Erkimo, populations of Greenland. It was found that the Inuit, with their traditional diet of seal, whale an
4、d Arctic fish a diet very high in fat suffered practically no heart disease, had near zero incidence of diabetes, and enjoyed a comparatively low rate of rheumatoid arthritis. (Interestingly, incidence of cancer, equal to that found in most other parts of the world, appeared unaffected by the tradit
5、ional Inuit diet.) Few Heart Attack Deaths Until the work of Dyberg and Bang in the 1970s, little attention was paid to the implications of a fish-rich diet, despite a centuries-old knowledge of Inuit customs. The two researchers noted that in one community of 1,800 people there were only three hear
6、t attack deaths between 1950 and 1974. To understand why, they examined the Inuits blood lipids and diet. Omega-3 fatty acids featured strongly in the bloodstream of the research subjects, directly attributable to diet. A Comparison between the Inuits in Greenland and those in Denmark In order to ru
7、le out genetic or racial factors from their findings, Dyberg and Bang went on to compare the Greenland Inuit communities with those Inuit residing in Denmark who consumed a diet almost identical to that of the Danes. The Inuit in Denmark, particularly those who had been there for longer periods, wer
8、e shown to have higher blood cholesterol levels and significantly higher serum triglyceride levels than their Greenland counterparts. In fact, the levels of the Westernized Inuits matched those of the Danes themselves, who consume mainly meat, milk products and eggs. As would be expected, levels of
9、heart disease and arteriosclerosis of the Inuit well-established in Denmark were far closer to those of the Danes man those of the Greenland Inuit. The findings, according to the researchers, indicated an Omega-3 deficiency in the Danish diet compared with the Greenland diet. Findings in Japan Simil
10、ar findings come from Japan. A comparison of the diets of farmers and fishermen, together with an examination of health records and death rates of the two groups, has shown a link between the health of the human heart and fish oil. Whereas the average Japanese farmer has 90 grams of fish a day, the
11、average fisherman has 250 grams. In all other respects, their diets are similar. Correspondingly, fishermen have lower blood pressure and lower rates of heart disease and rheumatoid arthritis. This compares with the 20 grams eaten daily by the average person in the US, where rates of heart disease a
12、nd arteriosclerosis are five to seven times higher than in Japan. Fish Oils Effects in the Treatment of Hyperlipidaemic Patients Its high Omerga-3 content and easy digestibility make fish oil particularly useful in the treatment of hyperlipidaemic patients. Studies have shown an inverse relationship
13、 between dosage of salmon oil and plasma triglyceride concentrations. Specifically, it has been found that the consumption of three grams of salmon oil per day by such patients reduces their plasma triglyceride levels some 32 per cent. For patients given six grams, the levels fall by 41 per cent, an
14、d for those taking nine grams, concentrations dropped an average of 52 per cent. The table below gives the Omega-3 contents of several fish varieties as compared with a selection of vegetable-based oils and butterfat. (分数:71.00)(1).It is concluded that fish oils is effective in the treatment of elev
15、ated blood lipids.(分数:7.10)A.YB.NC.NG(2).Diabetes is rare among the Greenland Inuit.(分数:7.10)A.YB.NC.NG(3).The Greenland Inuits rheumatoid arthritis levels are the lowest in the world.(分数:7.10)A.YB.NC.NG(4).Little was known about Inuit life in Greenland before the work of Dyberg and Bang.(分数:7.10)A.
16、YB.NC.NG(5).Blood cholesterol levels of the Denmark Inuit were lower than those of the Danes.(分数:7.10)A.YB.NC.NG(6).Research in Japan generally supports the findings of Dyberg and Bang with regard to the effects of fish oil.(分数:7.10)A.YB.NC.NG(7).Greenland Inuit and Japanese fishermen consume simila
17、r amounts of Omega-3 fatty acids.(分数:7.10)A.YB.NC.NG(8).The Danish Inuit consumes 1 almost identical to that of their Greenland counterparts.(分数:7.10)填空项 1:_(9).The average Americans rate of heart disease and arteriosclerosis are 1 higher than the Japanese.(分数:7.10)填空项 1:_(10).It is found that consu
18、mption of nine grams of salmon oil per day can reduce the plasma triglyceride by 1.(分数:7.10)填空项 1:_三、Listening Comprehens(总题数:1,分数:15.00)A.His father.B.His mother.C.His brother.D.His sister.A.A big travel agency.B.An experienced salesman.C.A job opportunity.D.A general sales manager.A.Mr. Green is i
19、n a meeting.B.Mr. Green is out of the building.C.Mr. Green has too much work.D.Mr. Green doesnt work there anymore.A.The man should call a friend.B.The man should work on his car.C.The man should take a taxi.D.The man should walk to work.A.The woman would understand if she did Marys job.B.The woman
20、should do the typing for Mary.C.The woman should work as hard as Mary.D.The woman isnt a skillful typist.A.He doesnt care much about it.B.He enjoys it very much.C.He doesnt mind ever though its tedious.D.He hates working overtime.A.The woman is driving too fast.B.The woman is driving at a slow speed
21、.C.The woman has broken a traffic rule.D.The woman has parked her car in a wrong place.A.He praises the woman for doing a good job.B.He enjoys the steak.C.He wants the steak to be cooked for a good while.D.He wants the woman to bring him the steak quickly.四、Section B(总题数:2,分数:10.00)A.It is now in da
22、ily touch with nine hundred people.B.The volunteers have completed one million calls.C.It is now starting to include new comers who want to meet new friends.D.It has got support from all the neighbors of the old.A.By a 77-year-old woman.B.By advertising in newspapers.C.By neighborhood group meetings
23、.D.On television.A.It is operated by federal employees.B.It has been in operation for fifteen years.C.It is especially for retired officials.D.It provides daily telephone calls.A.Get a ride home with Nancy.B.Find a place to live.C.Go to the store before it closes.D.Carry his groceries home.A.He didn
24、t expect to buy a lot.B.He had only one bag of groceries.C.The supermarket is just down the block.D.He thought hed get a ride with the Kramers.A.They are paying for his education.B.They invited him to their party.C.They took him on a vacation with them.D.They let him live with them for free.A.A hous
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- 大学 英语四 224 答案 解析 DOC
