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题库 / Prep2007E1-CR-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?
The total acreage devoted to grain production in Gortland will soon decrease.
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.
The per capita consumption of meat in Gortland is increasing at roughly the same rate across all income levels.
The per capita income of meat producers in Gortland is rising faster than the per capita income of grain producers.
People in Gortland who increase their consumption of meat will not radically decrease their consumption of grain.
注意本题有一个隐含的条件是：人吃meat也吃grain
所给出的条件：需要several pounds of grain来生产one pound of meat
所以meat、grain和人的关系是：①人comsume meat+grain ++ ②grain produce meat
现在的情况是：meat的消费增加（即produce meat使用的grain增加），但grain的产量不变 -- 要进口grain或meat
假设题要找gap：题中给出的情况符合逻辑链②，那么逻辑链①必须保证不变，也就是说人们如果减少自身对于grain的消费，那么不一定需要进口（也就是对于E选项取非），发现会影响结果！
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