来看看几道GRE笔考时的逻辑题：）

最近找了一本ＧＲＥ逻辑真题看，题型和ＧＭＡＴ相差无几．下面有几道题想向大家请教请教：）

１.a program of steady, moderate aerobic exercise coupled with a diet low in saturated fats and cholesterol has been associated with reduced risk of heart attacks and strodes. therefore, no one who ecercises regularly and eats only foods that are low in saturated fats and cholesterol will have a heart attack of stroke.

of the following,the best criticism of the argument above is that the argument does not

我只列出两个选项，其他都容易排除．

Ａ．take into account the possibility of heart attacks and stroke that occur regardless of diet and level of exercise

E.differentiate between the causes of heart attacks and the causes of strokes

答案是Ａ．我记得ＯＧ和新东方材料上面都有类似的题，思路都是没有区分到底谁引起谁．这个题怎么选Ａ呢？：）：）

推理错误是：简单相关说成因果关系。

仔细读一下，其实这两个causes文中都没有提到的。

therefore, no one who exercises regularly and eats only foods that are low in saturated fats and cholesterol will have a heart attack of stroke.

这句话不就是说，规律的运动和吃含有少量脂肪胆固醇的食物就不会得心脏病吗？我觉得他就是一种因果关系啊，而且，刚才查到og上面一个类似的题，觉得思路也一样的。请看：

og48:

A researcher disvovered that people who have low levels of immune-system activity ten to score much lower on tests of mental health than do people with normal or high immune-sysytem activity. The resrearcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.

问的是假设，答案是

mental illness does not cause people's immune-system activity to decrease.

这个假设就排除了精神病导致免疫系统下降的可能性。所以就只能是免疫系统下降导致精神病了。我觉得这个题就是一个典型的混淆原因结果的题型。

不知道我的理解哪里错了呢？？？同时非常感谢你的回帖！！！

你的理解是正确的。

.a program of steady, moderate aerobic exercise coupled with a diet low in saturated fats and cholesterol has been associated with reduced risk of heart attacks and strodes. therefore, no one who ecercises regularly and eats only foods that are low in saturated fats and cholesterol will have a heart attack of stroke.

请注意，那个therefore代表的是原文的推理；问的是weakness，就是说推理错在哪里；错在把简单相关说成因果。

这是一类题，MM做多了可以稍加总结，就会发现这类题的规律。