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题库 / Prep2012-CR-17
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 terrain makes even such basic activities as walking relatively strenuous; it essentially imposes a physically active lifestyle on people. Clearly, this circumstance explains the long lives of people in Wistar.
Which of the following, if true, most seriously weakens the argument?
In Bellaria all medical expenses are paid by the government, so that personal income does not affect the quality of health care a person receives.
People living in Wistar do not have a significantly better diet than people living in other parts of Bellaria.
Many people who live in the Wistar region have moved there in middle age or upon retirement.
The many opportunities for hiking, skiing, and other outdoor activities that Wistar's mountains offer make it a favorite destination for vacationing Bellarians.
Per capita spending on recreational activities is no higher in Wistar than it is in other regions of Bellaria.
Wistar平均的死亡年龄比其他地方都要高，这是因为这片地形有山因此对体力有很高的要求。相关推因果，问weaken
choice b, Wistar地区的人的饮食并不会比其他地区的人的饮食好很多。 strengthen the conclusion，排除他因
choice c, 许多搬家到了Wistrd的人都是中年或者退休了以后才搬家过来的。correct，他因说明平均死亡年龄相对高的原因，是因为人群分布的关系
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