逻辑狗里的，逻辑专区发了2天没人理，只好发过来了，帮忙

dugujianzp · 发表于 2010-3-13 20:54:48

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

zowenny · 发表于 2010-3-13 22:01:47

E去掉not 之后表示那的人增加了肉的消耗就会减少grain 的消耗
看原文，收入增加导致人们想多吃肉，但本地grain 产量不能增加并且我们要用好几磅grain 才能生产一磅肉。所以结论是我们必须进口肉或者grain 或者both

现在我增加了吃肉就会想少吃grain，所以在grain总产量不变的前提下，我可以用我少吃的grain 来做成肉这样的话我就不用进口了...那不就是对原为我最少进口一种东西这个结论的削弱吗？

西点 · 发表于 2010-3-13 22:10:25

假设多吃了肉的同时并没有减少谷物的吃的量~所以才进口了嘛

dugujianzp · 发表于 2010-3-13 22:15:44

对，想明白了，真是谢谢楼上2位了，谢谢啦

逻辑狗里的，逻辑专区发了2天没人理，只好发过来了，帮忙

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