求教

碧海银沙 · 发表于 2010-8-8 09:20:28

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 some have to import either grain or meat or both.

Which of the following is an assumption on which the argument depends?

A) The toatl acreage devoted to grain production in Gortland will soon decrease.

B) Importing either grain or meat will not result in significantly higher percentage of Gortlanders' income being spent on food than is curently 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.

请大虾们帮我讲讲这道题的意思。我自己的感觉是题目就没看懂。最好能够用中文讲讲。谢谢。

fengshou · 发表于 2010-8-8 12:09:12

我觉得是E吧。

大概题意：一个地方自产稻子和肉，这个地方的人均收入增长到跟世界的人均收入差不多了，人均食肉量也跟世界的人均食肉量差不多了，而且好几磅稻子才产出一磅肉。所以，由于人均收入一直在涨，而这地区的稻子产量不增长，这地区将要进口稻子或肉或两者都要进口。

碧海银沙 · 发表于 2010-8-9 20:13:51

还是没明白。人均收入长，为什么稻子或肉或两者的消费就要长阿。觉得自己很白痴。

fengshou · 发表于 2010-8-9 22:11:03

额你有更多的钱了就会去买更多你喜欢的东东了不是么？那这个地区滴人就爱吃稻子和肉所以。。。这方面滴消费量就会增长。

liufeng881025 · 发表于 2010-8-9 22:25:13

我觉得选C啊
题目说 income 上升， meat消费上升，如果 income继续上升，那么就必须进口稻子或者肉。这个推理应该是建立在meat消费上升的基础上啊。
如果把C选项取非，肉的消费不与收入的上升同步，那么如果收入继续上升，肉和稻子消费都不变，那不就不用进口了么。

fengshou · 发表于 2010-8-10 00:17:12

整个结论是必须进口稻子或肉或both。注意稻子是用来食用和产肉用的

如果人们减少了他们的稻子消费那很大一部分的稻子就可以用来产肉了而人们的肉消费量恰恰增长这样就不用进口肉跟稻子了自给自足。

所以选E。

碧海银沙 · 发表于 2010-8-10 19:56:28

感谢fengshou.有点明白了。

求教

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