求教，狒狒第58题

ying178

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.    eople 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，看了狒狒的解题思路，仍旧不太明白，请高手指点，谢！

2013rainbow

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.    eople 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，看了狒狒的解题思路，仍旧不太明白，请高手指点，谢！

-- by 会员 ying178 (2012/2/3 13:14:51)

这题的前提是生产一单位肉要消耗多单位的粮食，结论是食物短缺不仅仅因为资源有限和人口增加（暗示因为人的食品选择）

简单那说：吃得不够是因为土地都种动物饲料了，就没地给人钟吃的了。

E选项说的就是这回事儿。

BTW，我觉得还有一个组比较暗的假设，那就是（给动物吃的不能给人吃+一单位的肉在满足食物需求上比不上多单位的粮食）

ying178

谢谢。