狗狗的一个假设题，求助啊

dugujianzp · 发表于 2010-3-11 17:49:30

Gortland has long been narrowly self-sufficient in both grain and meat．However, as per capita income in Gortland has risen toward the world average，per capita consumption of meat has also risen toward the world average，and it takes several pounds of grain to produce one pound of meat．Therefore，since per capita income continues to rise，whereas domestic grain production will not increase，Gortland will soon have to import either grain or meat or both．
Which of the following is an assumption on which the argument depends?
(A) The total acreage devoted to grain production in Gortland will not decrease substantially
(B) The population of Gortland has remained relatively constant during the country's years of growing prosperity．
(C) The per capita consumption of meat in Gortland is roughly the same across all income levels．
(D) In Gortland，neither meat nor grain is subject to government price controls．
(E)

eople in Gortland who increase their consumption of meat will not radically decrease their consumption of grain．

这个给的答案是e，那么如果按照假设题not+weaken的做法，那么e去掉not削弱什么了呢，没看明白啊，求助大家

dugujianzp · 发表于 2010-3-13 20:53:48

没人帮忙吗，一天了，自己顶

dengyichao · 发表于 2010-3-14 08:14:07

如果把E取非，就是增加了肉的消费量的人们会减少对谷类的消费量。这样gortland就一定要进口肉或者谷类了。起到了削弱文章结论的作用，所以是假设。

kaipiggy · 发表于 2010-8-13 17:04:59

不明白。。。。。。。

2008115061 · 发表于 2010-8-13 23:59:27

来让LZ 明白。

看清楚推理过程：人口多了，要吃肉的多了，可是肉和grain（可以转换成肉）的产量都不变————》所以需要进口。

可是，如果人们不需要grain了呢？这样的话，就可以把多出来的grain去生产肉了，也就不用进口了

狗狗的一个假设题，求助啊

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