Q38:

Two centuries ago, LACE>LACENAME>TufeLACENAME> LACETYPE>PeninsulaLACETYPE>LACE> became separated form the mainland, isolating on the newly formed LACE>LACENAME>TufeLACENAME> LACETYPE>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?

1. There are no types of vegetation on Tufe Island that are known to benefit from dry conditions.
2. There were about as many Turfil sunflowers on Tufe Peninsula two centuries ago as there are on Tufe Island today.
3. 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.
4. 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.
5. 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.

答案C

不明白 growing to be 40 centimeters taller than they did two centuries ago 如何得出?

因为差 40公分

所以前提要非mainland气候改变导致增长差40公分

感觉这T 怪怪的 不象ASSUMPTION 一般类型的样子

选这T 的时候 看到C 的NOT 我去掉了 原文结论不成立 于是就选了

但现在仔细看看 感觉我的思路好象有点问题！文章里说的是 on average, 40 centimeters shorter than Turfil sunflowers found on the mainland

C 去NOT ，

Before u do these assumption questions, u should know what is the conclusion of the paragraph. According to the conclusion, try to understand how the argument is reasoned to arrive the conclusion.

In this question, the argument is concluded that current average height of T's TS is attributable to changes in T's envirenmental conditions. Pay attention to words highlight above, changes in T's enviremental conditions, if C is not assumed, then it's possible that enviremental conditions changes in mainland causes the T's TS 40 cm shorter, then the conclusion will be questionable.

"Before u do these assumption questions, u should know what is the conclusion of the paragraph. According to the conclusion, try to understand how the argument is reasoned to arrive the conclusion." -- Leeon

I don't want to over-emphasis it. It is by all means right. This should also be applied to Bold Face questions. Even if you run out of time and couldn' t read the full premises, you can still make educated guess just based on knowing the conclusions.

" 还有 ABE 无关 D WEAKEN 吧？"

A,B,D are "out of scope". E is too extreme (only difference).

You can believe D is weaken. However, the conlusion concerns "environmental conditions", but in D, it concerns "DRY environmental conditions". 偷换概念