再发prep1-19 望指教

delan714 · 发表于 2009-11-20 21:47:41

19.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 soon decrease.

(B)Importing either grain or meat will not result in a significantly higher percentage of Gortlanders' incomes being spent on food than is currently the case.

(C)The per capita consumption of meat in Gortland is increasing at roughly the same rate across all income levels.

(D)The per capita income of meat producers in Gortland is rising faster than the per capita income of grain producers.

(E)People in Gortland who increase their consumption of meat will not radically decrease their consumption of grain.

对这道题一直有疑问，之前也看过几个相关的讨论帖，发现都没有得出比较明确的解释，讨论也没有继续下去。于是想再发一次这道题。

以下是之前两个讨论帖的链接：

http://forum.chasedream.com/GMAT_CR/thread-271207-1-1.html

http://forum.chasedream.com/GMAT_CR/thread-251085-1-1.html

答案是E，个人觉得该选项如果能点出谷物下降的比率就能比较容易理解一些。倘若该地区的人们对谷物的需求量下降的比率大于对肉类的消费量增长的比率的两倍，就可以用多余的谷物来制造肉类，就可以无需进口（不管是肉类还是谷物），实现自给自足。

望指教。谢谢

ajassmine · 发表于 2009-11-22 13:27:34

我觉得文的观点是：
per capita income增加了（人的消费能力增加了），per capita consumption of meat也增加了（对grain的消费能力也增加了），而grain production没有增加，推论出将来因钱多消费多而进口。
这个“进口”的结论的基础就是，meat和grain的消费都增加，所以E的假设是对的~

再发prep1-19 望指教

所属分类: GMAT考试

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