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标题: GWD2-40 [打印本页]

作者: 爱穿越太平洋 时间: 2006-9-21 22:14
标题: GWD2-40

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?

There are no types of vegetation on Tufe
Island that are known to benefit from dry conditions.
There were about as many Turfil sunflowers on Tufe
Peninsula two centuries ago as there are on Tufe
Island today.
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.
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.
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.

为什么选C啊，我觉得C不是assumption，而是weaken啊~~

作者: bisakiki 时间: 2008-10-28 23:23

我把这张天顶上来，是因为没找到其它相关的讨论了

我也和lz一样觉得是在问weaken

作者: familywendy 时间: 2010-8-18 21:30
也是不懂。。。

作者: 哦买嘎 时间: 2010-8-18 23:10
把C取非就是“大陆环境改变了，使得生长在大陆环境中的向日葵长得要比两个世纪前高40厘米”，这个取非的假设无法使原题中的结论成立了，因为原题中的论证是，是孤岛的干旱环境使那的向日葵比大陆上的矮40厘米。所以C就是假设。

作者: 小蘑菇开始打怪 时间: 2013-11-14 22:03
顶一下，顺便我想问。。CD上到底流传了多少种不一样的GWD啊。。。

作者: 小蘑菇开始打怪 时间: 2013-11-14 22:05
突然一下懂了！
题目中说环境的变化会使向日葵的高度改变，那也就是说如果环境不改变，那向日葵的高度就不会变，正好就是C选项啊~所以C是一个前提假设

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