一道费费逻辑题，求NN解答！！~~~~~~~

naryi · 发表于 2013-3-21 06:43:14

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.

答案是E 不明白，既然会yield more food 那怎么还会有食物的缺乏？yield在这里是产出还是放弃的意思？
谢谢大家~~~

lacedaemonian · 发表于 2013-3-21 18:21:43

你这题做不出来，应该是阅读的问题，不是逻辑的问题，阅读能力需要加强；

提干的意思是，有人认为食物不够有两个原因，地球资源有限，二是人口增长太快。但是作者提出来说，事实不是这样的，因为有一半的耕地都用来种植饲养牲畜用的农作物了。所以食物缺乏，并不仅仅是资源有限和人口增长太快造成的。
这个推论从论证到结论之间，有几个明显的漏洞，其中一个就是答案E提到的问题：在现在种植牲畜饲料的耕地上，种植人食用的作物，能够产出更多的食物给更多的人。如果没有这个假设，那文中作者的推论就无法成立。
注意选项E中“currently devoted to crops for livestock”是the acreage的定语

naryi · 发表于 2013-5-3 23:21:29

lacedaemonian 发表于 2013-3-21 18:21
你这题做不出来，应该是阅读的问题，不是逻辑的问题，阅读能力需要加强；提干的意思是，有人认为食物不够有 ...

en 明白了谢谢啦~！

patriciasonghan · 发表于 2014-2-8 22:58:38

这道题我还是不理解啊

一道费费逻辑题，求NN解答！！~~~~~~~

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