27. These days, drug companies and health professionals alike are focusing their attention on cholesterol in the blood. The more cholesterol we have in our blood, the higher the risk that we shall die of a heart attack. The issue is pertinent since heart disease kills more North Americans every year than any other single cause. At least three factors---smoking, drinking, and exercise—can each influence levels of the cholesterol in the blood. Which one of the following can be properly concluded from the passage? A. If a person has low blood cholesterol, then that person’s risk of fatal heart disease is low. B. Smoking in moderation can entail as great a risk of fatal heart disease as does heavy smoking. C. A high-cholesterol diet is the principal cause of death in North America. D. The only way that smoking increases one’s risk of fatal heart disease is by influencing the levels of cholesterol in the blood. E. The risk of fatal heart disease can be altered by certain changes in lifestyle. 答案是E。解释: A. 原文中说,胆固醇越高,生心脏病的可能性越大。A选项的内容是否命题,不一定成立。 B. 原文中没有提到此相关信息。 C. 显然不对,因为文中结尾明显说抽烟、饮酒和缺少运动也可以影响血液中胆固醇水平,所以不能保证C是正确的。 D. 文中没有说是only way哦。 E就是它了。可以通过调整抽烟、饮酒、运动等生活方式来减少心脏病的可能性。 这是狒狒的27题。对于A,想大家帮我看看思路: 我的理解是题文中The more cholesterol we have in our blood, the higher the risk that we shall die of a heart attack,说的是cholesterol和heart attach的关系,而A中是cholesterol和heart disease的关系,heart attack 和heart disease的范畴不一样,所以不对。但是狒狒解释中说的,A是否命题所以不对。我怎么没看出来是否命题啊?是不是我的理解有误啊? |