问逻辑jj里一道题 （肉和谷物）

aruora

2. 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 gain 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. People in Gortland who increase their consumption of meat will not radically decrease their consumption of grain.

答案是A还是B？

suzy2728

支持E的

非常尴尬

aruora

为啥~~

suzy2728

以下是引用aruora在2009/8/26 9:03:00的发言：
为啥~~

今早起来看又觉得是B了

isaxi

感觉是B。
条件是比例的问题，结论是数量的问题。所以经过换算，只有人口不变，才有这个结论。如果人口减少，就不会有这个结论了。

陶多猫

这不是OG11最前面那个综合测试里面的题么，答案是E啊，如果谷物的消耗量radically decrease的话，就可以用谷物produce肉了吧。。

孤独狂欢

E吧？

我怎么觉得AB都是无关的。。。

zhongtiangg

A,B,E都有一定的道理。关键是哪一个最直接，最切近问题的实质。

思路：

原文讨论的是consumption of meat and grain. 问题又提到了“grain production will not increase”，已经提示了答案应该提到grain和meat之间的关系。

其他的选项total acreage， The population of Gortland  就是无关选项。