阅读理解 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 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 and 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 traditional 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 heart 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 rule 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, were 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 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 Similar 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 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 and arteriosclerosis are five to seven times higher than in Japan. Fish Oil''s 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 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, and 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.
单选题 It is concluded that fish oils is effective in the treatment of elevated blood lipids.
【正确答案】 A
【答案解析】本句的关键词是effective。我们可以把原文定位在第一段第三句，其中的reactive positively to the treatment说明的就是effective。因此判断为YES。
单选题 Diabetes is rare among the Greenland Inuit.
【正确答案】 A
【答案解析】本句的关键词是rare，看此种说法是否与原文一致。我们将原文定位在第二段第二句It was found that the Inuit，with their traditional diet of seal，whale and Arctic fish—a diet very high in fat—suffered practically no heart disease，had near zero incidence of diabetes．句中的“near zero”与“rare”同义。因此判断为YES。
单选题 The Greenland Inuits'' rheumatoid arthritis levels are the lowest in the world.
【正确答案】 B
【答案解析】本句的关键词是the lowest。我们将原文定位在第二段第二句的后半部分，enjoyed a comparatively low rate of rheumatoid arthritis。原文中说的足他们患风湿性关节炎的比率“相对”较低，并没有说是最低。因此判断为NO。
单选题 Little was known about Inuit life in Greenland before the work of Dyberg and Bang.
【正确答案】 B
【答案解析】本句的关键词是Little was known。原文就定位在第三段第一句，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．说的是在Dyberg与Bang进行研究之前，没有人注意到多吃鱼会有这样的好处，并不是没有人知道伊努伊特人的生活，despite(尽管)告诉我们其实知道他们有吃鱼的习惯已100多年了。因此判断为NO。
单选题 Blood cholesterol levels of the Denmark Inuit were lower than those of the Danes.
【正确答案】 B
【答案解析】此句的关键词是lower。我们将原文定位在第三段中间的In fact，the levels of the Westernized Inuits matched those of the Danes themselves。这句的matched告诉我们丹麦伊努特伊人的血脂水平与丹麦人一样高。题目的表述与此相反，所有判断为NO。
单选题 Research in Japan generally supports the findings of Dyberg and Bang with regard to the effects of fish oil.
【正确答案】 A
【答案解析】此句的关键词是support。我们将原文定位在第5段的第一句，这也是本段的主题句。原文Similar findings come from Japan告诉我们来自日本的研究结果相同，当然“支持”他们俩的研究成果。判断为YES。从本段第一句就可做出判断，后文就不必再往下看了。
单选题 Greenland Inuit and Japanese fishermen consume similar amounts of Omega-3 fatty acids.
【正确答案】 C
【答案解析】此句的关键词是Omega-3。放眼第5段，根本就没出现“Omega-3。Fatty acids”的字眼。因此不用说是NOT GIVEN。
填空题 The Danish Inuit consumes 1 almost identical to that of their Greenland counterparts.
填空题 The average Americans'' rate of heart disease and arteriosclerosis are 1 higher than the Japanese.
填空题 It is found that consumption of nine grams of salmon oil per day can reduce the plasma triglyceride by 1.