求助cr prep07的一道题

1998JIN · 发表于 2019-1-12 18:04:37

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.
答案为E，
我做题时觉得五个都不对然后选错了，我不太明白的是，题干中说的是either grain or meat or both
即使e不成立，meat也还是要进口的啊，我看到解释有说grain可以做meat的。。。恩？？这违反我的常识啊，我觉得题干只是说做meat还需要grain吧。。。难道meat 不够grain还能替补吗？
求问！！！感谢

海贼王的男人 · 发表于 2019-1-13 12:54:50

将e选项取非就很明显了，meat 升，grain 减，减下来的grain 补充meat ，就不用进口了。反之则需要。

1998JIN · 发表于 2019-1-13 15:14:19

海贼王的男人发表于 2019-1-13 12:54
将e选项取非就很明显了，meat 升，grain 减，减下来的grain 补充meat ，就不用进口了。反之则需要。 ...

我只是不太理解，grain为什么可以补充meat啊。。。。这不是两种完全不一样的东西吗？

海贼王的男人 · 发表于 2019-1-14 10:24:21

1998JIN 发表于 2019-1-13 15:14
我只是不太理解，grain为什么可以补充meat啊。。。。这不是两种完全不一样的东西吗？ ...

仔细看题啊，题目中明确说了 and it takes several pounds of grain to produce one pound of meat.

marinzou · 发表于 2019-1-18 11:42:18

哈哈，文化差异吧。如果只把comsuption看成吃的话，steak & fries之类的肉肉，sandwich, pasta之类的就吃不下了。

求助cr prep07的一道题

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