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标题: GWD逻辑题请教 [打印本页]

作者: melody远行 时间: 2012-5-7 14:59
标题: GWD逻辑题请教

A diet high in saturated fats increases a person’s risk of developing heart disease. Regular consumption of red wine reduces that risk. Per-capita consumption of saturated fats is currently about the same in France as in the United States, but there is less heart disease there than in the United States because consumption of red wine is higher in France. The difference in regular red-wine consumption has been narrowing, but no similar convergence in heart-disease rates has occurred.

Which of the following, if true, most helps to account for the lack of convergence noted above?

A.Consumption of saturated fats is related more strongly to the growth of fatty deposits on artery walls, which reduce blood flow to the heart, than it is to heart disease directly.

B.Over the past 30 years, per-capita consumption of saturated fats has remained essentially unchanged in the United States but has increased somewhat in France

C.Reports of the health benefits of red wine have led many people in the United States

to drink red wine regularly.

D.Cigarette smoking, which can also contribute to heart disease, is only slightly more common in France than in the United States

E.Regular consumption of red wine is declining dramatically among young adults in France

, and heart disease typically does not manifest itself until middle age.
这题不能理解为什么E选项解释了问题，文章说的是美国的变化而E选项说的是法国的变化，二者其实是没有联系的呀。假设即是法国人没有变化，那么美国人消费的红酒上升了，两者的差别应该是缩小的。求解释！

作者: maestri 时间: 2012-5-7 15:57
题目说的是两个国家之间的比较，因此与两个国家都有关系。大概题目理解如下

题干：富含饱和脂肪的饮食增加一个人患上心脏病的风险。经常饮红酒能够降低这种风险。目前在法国和美国饱和脂肪的人居消费是差不多一样的，但是法国因为红酒消费高，所以心脏病更少。
（美法两国）日常红酒消费正在逐渐缩小，但是心脏病发病率却没有变的统一的趋势。

目前：脂肪酸一样，喝酒法国多
趋势：喝酒有了统一趋势（美国喝酒多或者法国喝酒少），心脏病率没有统一

如下哪一种如为真，最能帮助解释这种不统一性？

E:法国喝酒少了，只是心脏病率的变化目前还没体现出来

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