求解一道GWDCR题

eliasfan · 发表于 2011-1-13 18:16:12

GWD3-Q40:

Two centuries ago, Tufe Peninsula
became separated form the mainland, isolating on the newly formed Tufe Island a population of Turfil sunflowers.This population’s descendants grow to be, on average, 40 centimeters shorter than Turfil sunflowers found on the mainland.Tufe Island is significantly drier than Tufe Peninsula was.So the current average height of Tufe’s Turfil sunflowers is undoubtedly at least partially attributable to changes in Tufe’s environmental conditions.
Which of the following is an assumption on which the argument depends?

A.There are no types of vegetation on Tufe Island
that are known to benefit from dry conditions.
B.There were about as many Turfil sunflowers on Tufe Peninsula
two centuries ago as there are on Tufe Island today.
C.The mainland’s environment has not changed in ways that have resulted in Turfil sunflowers on the mainland growing to be 40 centimeters taller than they did two centuries ago.

D.The soil on Tufe Island
, unlike that on the mainland, lacks important nutrients that help Turfil sunflowers survive and grow tall in a dry environment.
E.The 40-centimeter height difference between the Turfil sunflowers on Tufe Island
and those on the mainland is the only difference between the two populations.

eliasfan · 发表于 2011-1-13 18:16:58

The answer is C ,but I think D is also right !
Who can explain why?

lemorning · 发表于 2011-1-14 22:26:03

我觉得很重要的一点，做assumption题要的不是充分条件，而是没有这个assumption你的结论就不一定成立
在这里结论是差异源于T island的环境变化，所以前提必须排除不是T mainland的环境变化导致的差异。不然，如果是mainland的环境是其上的flower长高，而非island的变矮，结论就不成立了。。。
GMAT复习Google是王道，几乎所有题都有人问过了。。。。

eliasfan · 发表于 2011-1-14 23:07:10

谢谢

love凤巢 · 发表于 2013-4-11 15:00:26

为什么我觉得那个 form 的单词放在那边那么的奇怪呢？感觉那句话读不通啊。是不是应该改成from 呢？

求解一道GWDCR题

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