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标题: lsat－5－2－21 [打印本页]

作者: dalunzi 时间: 2004-12-9 14:02
标题: lsat－5－2－21

21. The public is well aware that high blood cholesterol levels raise the risk of stroke caused by blood clots. But a recent report concludes that people with low blood cholesterol levels are at increased risk of the other lethal type of stroke – cerebral hemorrhage, caused when a brain artery bursts. The report suggests that because blood cholesterol plays a vital role in maintaining cell membranes, low blood cholesterol weakens artery walls, making them prone to rupture. The conclusion thus supports a long-standing contention by Japanese researchers that Western diets better protect against cerebral hemorrhage than do non-Western diets.

The argument is based on which one of the following assumptions?

(A) Western diets are healthier than non-Western diets.

(B) Western diets result in higher blood cholesterol levels than do non-Western diets.

(D) Cerebral hemorrhages are more dangerous than strokes caused by blood clots.

(E) People who have low blood pressure are at increased risk of cerebral hemorrhage.

在B和C之间徘徊。不明白B为什么不对，如果说B更像归纳题的答案的话，觉得C也差不多。两个都不像典型的假设题答案。

作者: new_new 时间: 2004-12-9 18:06

题目的推导关系是：low blood cholesterol levels（设为A）------>a brain artery bursts（B）------->cerebral hemorrhage（C）

但是C的答案是preclude the weakening of artery walls，也就是由非B推出非C，不能成立。

作者: dalunzi 时间: 2004-12-10 13:52

new_new ，那你认为答案是哪个呢？书上给的标准答案是C。

题目的推导关系是：low blood cholesterol levels（设为A）------>a brain artery weaken(B)－－－》artery bursts（C）------->cerebral hemorrhage（D）接着作者结论：在protect against cerebral hemorrhage上，Western diets better than non-Western diets。

为什么Western diets好，当然是因为答案B，所以我觉得B更像归纳。

而C则是对low blood cholesterol levels（设为A）------>a brain artery weaken(B)推导过程的一种假设，所以我觉得它作为答案有些牵强，它和结论一点关系都扯不上。只是从“假设”的角度上来说比B好一点。

所以我还是困惑，希望大家继续指点。

作者: new_new 时间: 2004-12-10 17:06
我晕，我的答案是B，书上给的答案就是B啊。。。。。？？？？难道我们手里的答案还不一样？

作者: lawyer_1 时间: 2004-12-10 20:26

答案为B。这是典型的GAP

原文推理： low blood cholesterol levels 易引起cerebral hemorrhage。所以Western diets better protect against cerebral hemorrhage than do non-Western diets。C和结论无关

作者: dalunzi 时间: 2004-12-13 11:58

谢谢各位，我的书上答案给的C,所以......

我的书在新东方门口游击队手里买的，该不会其它答案也有问题吧。尤其是想到我做完的8套已经全部对过答案。今天发现这题是因为答案错了，那其它认为已经搞定的题......

汗！！！

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