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19. (27995-!-item-!-188;#058&003473) Gortland haslong been narrowly self-sufficient in both grain and meat. However, as percapita income in Gortland has risen toward the world average, per capitaconsumption of meat has also risen toward the world average, and it takesseveral pounds of grain to produce one pound of meat. Therefore, since per capita income continuesto rise, whereas domestic grain production will not increase, Gortland willsoon have to import either grain or meat or both. Which of thefollowing is an assumption on which the argument depends? (A) The totalacreage devoted to grain production in Gortland will soon decrease. (B) Importingeither grain or meat will not result in a significantly higher percentage ofGortlanders' incomes being spent on food than is currently the case. (C) The percapita consumption of meat in Gortland is increasing at roughly the same rateacross all income levels. (D) The percapita income of meat producers in Gortland is rising faster than the percapita income of grain producers. (E) People inGortland who increase their consumption of meat will not radically decreasetheir consumption of grain.
问题1.ACD都没有否定词，按照XDF说的没哟否定词一般都错，是这样吗？这是什么原理啊？
2.取非后怎么判断不出ABCD如何错啊？
谢谢大神赐教
答案为E | 
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发表于 2013-4-20 20:03:22
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