CR 一题求解！

bestgame · 发表于 2015-3-29 23:36:12

Q: 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.

C) Many people who live in the Wistar region have moved there in middle age or upon retirement
D) The many opportunities for hiking, skiing, and other outdoor actovities that Wistar mountains offer make it a favorite destination for vacationing Bellarians.

此题为什么选C，不选D? 谢谢！

shua2015 · 发表于 2015-3-30 01:38:24

i doubt your opinion is that since only vacationing Bellarians have this active lifestyle, it weakens the arguemnt. In fact, it strengthens the conclusion as these exercising opportunities have increased the life span of the group of vacationing Bellarians;thus,it increases the average age at death of the whole population.
C is clear, as it points out another reason to explain the phenomenon that, lots of aged people moves to Wistar region to explain the argument,that is, the moving will result two consequences - the average age of death will fall in other region, but that of Wistar will increase.

alzn2765 · 发表于 2015-5-30 20:59:26

果因推理。
果：长寿
因：运动多

削弱：它因。
C的意思是说当地的人都是成年或者退休以后才搬到这个地方的。死人不可能搬来。别的地方有的人生下来就死了，有的人英年早逝，这些人在计算death age的时候会拉低死的age的均值，而这个地方这部分人都没有，那么这个地方人死的平均age就相比较其他地方要高。这就是它因。削弱了结论：因为爱运动导致的长寿。

xpeedy · 发表于 2016-11-29 03:29:20

alzn2765 发表于 2015-5-30 20:59
果因推理。
果：长寿
因：运动多

CR 一题求解！

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