202.Gortland has long been narrowly selfsufficient 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.
B答案怎么排除啊?根据文章意思,平均每人的收入在增长,则平均每人消耗肉的量在增加,但是如果国家总人口数量出现了下降,那么总的肉的消耗数量不一定会增长,那么就不需要进口肉或者谷物,也就削弱了结论,文中使用per capita,结论又是与总量有关,这里面其实就隐含了一个假设,那就是人口基数未变,不是吗? 假如真要排除B,文章应该别提per capita,这样就不会产生歧异了,请各位NN指点,不胜感激! |