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58. Some people say that the scarcity of food is a function of the finite limits of the earth’s resources, coupled with a relentless rate of population growth. This analysis fails to recognize, however, that much of the world’s agricultural resources are used to feed livestock instead of people. In the United States, for example, almost one-half of the agricultural acreage is devoted to crops fed to livestock. A steer reduces twenty-one pounds of inexpensive grain to one pound of expensive meat. Thus, the scarcity of food is not merely a function of limited resources and population growth.
Which one of the following is an assumption that would allow the conclusion in the argument to be properly drawn?
A.People prefer eating meat to eating grain.
B.Meat is twenty-one times more expensive than grain.
C.The limits of the earth’s agricultural resources are not finite.
D.More than one-half of the agricultural acreage in the United States is devoted to drops fed to humans.
E.Growing crops for human consumption on the acreage currently devoted to crops for livestock will yield more food for more people.
文中说食物短缺不仅仅是因为资源有限和人口过多，还有喂牲口的问题
答案给出了E选项，但是将E取非，把CROP喂给牲口不会yield more food,这不正好支持结论了吗？既food scarcity也是因为喂牲口，因为他们也不能制造更多食物。。这样理解对吗？
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发表于 2011-10-7 13:36:00
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