V1. Prep 1-19（变体）: 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 grain production in Gortland will soon decrease. (B) 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. (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.
答案：E。"whereas domestic grain production will not increase, Gortland will soon have to import either grain or meat or both." There is another possible explain, that is, if people in gortland consume grain decrease,the decrease amount of grain maybe balance the increase amount that meat require, therefore, Gortland may not necessarily import grain from outside. It will weaken the argument. Plus E, the argument will be strengthened.
V5. 完成句子：over 65岁的老年人,体重下降10%的比体重没下降的老年人有2倍机会骨折(hip fracture)，但不表示weight loss是造成risk增加的原因,因为？(serious illness, which contributes to weight loss, may increase the risk，大意如上，为weight loss再找个前因就对了)
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发表于 2012-4-17 15:30:45
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希望你们个个都700+~~~