OG 一题欢迎各位拍砖

wynyy2000 · 发表于 2011-4-2 13:28:40

A physically active lifestyle has been shown to help increase longevity. In the Wistar region of Bellaria, the average age at death is considerably higher than in any other part of the country. Wistar is the only mountainous part of Bellaria. A mountainous terrian makes even such basic activities as walking relatively strenuous; it essentially imposes a physically active liefestyle on people. Clearly, this circumstance expains the long lives of people in Wistar
Which of the following, if true, most seriously weakens the argument?
C. Many people who live in the Wistar region have moved there in middle age or upon retirement
E. Per capita spending on recreational activities is no higher in Wistar than it is in other regions of Bellaria
我自己是这么想的，既然要削弱文中的argument, 就是需要证明people in Bellaria 长寿并不是因为a physically active lifestyle的原因
正确答案是C，我觉得即使是中晚年才过来住，也可以形成physically active lifestyle，不足以构成weak factor
我选E，从人们的支出状况可以知道，对运动的投入并不是想象中的那么多。。
求解释？？！！

littlexian · 发表于 2011-4-2 14:07:52

Well, actually I agree with you. C is not a really good answer. However, C is still better than E.

About C., you can think that lifestyle is how a person lives in his/her life. Since people move to Wistar region during their middle age or upon time, I think the choice C is trying to say that the life styles of these people are already fixed before they move.

E's problem is the word "recreational activities". The passage already points out that in Wistar region "A mountainous terrian makes even such BASIC ACTIVITIES AS WALKING relatively strenuous." Therefore, even though the people in Wistar do not spend more on recreational activities than other people. They may still get more physical activities from their daily live. Therefore, E does not weaken the argument.

wynyy2000 · 发表于 2011-4-2 18:23:15

I got it!!

sdcar2010 · 发表于 2011-4-2 22:03:04

The key to this problem is to realize a common fallacy:

2) Biased-sample fallacy: A sample that is not representative of the population which is under consideration. This fallacy is committed when a person draws a conclusion about a population based on a sample that is biased or prejudiced in some manner.
Large scale polls were taken in California, Washington and Maine and it was found that an average of 65% of those polled spent at least two weeks a year near the ocean. So, it can be safely concluded that around 65% of all Americans spend at least fortnight near the ocean each year.

In this case, the author assumes that the ONLY difference between the people living in W and those in B is that the former live in mountains. C says NO. People in W are much older, on average, than people in B to begin with. Therefore, C weakens the argument effectively.

xiaobao310 · 发表于 2012-2-9 11:58:49

我当时选C的原因是觉得去的人年龄都大就拖老的平均寿命不知道这么理解对不对啊

OG 一题欢迎各位拍砖

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