为什么prep里的题好多都没人讨论呢？！问prep2 79！

zanyingsan

The country of Baurisia has, until now, been self-sufficient in both grain and meat.  However, with growing prosperity in Baurisia has come a steadily increasing per capita consumption of meat, and it takes several pounds of grain to produce one pound of meat.  Therefore, since per capita income in Baurisia is almost certain to rise further but increases in domestic grain production are highly unlikely, Baurisia is soon likely to become an importer of grain.

Which of the following, if true, most seriously weakens the argument?

A. When people increase their consumption of meat, they also tend to increase their consumption of grain.
B. The per capita consumption of meat in Baurisia is roughly the same across all income levels.
C. Per capita consumption of meat has not increased substantially in recent years in those countries from which Baurisia is likely to import meat.
D. It is more economical for Baurisians to import meat than grain.
E. During Baurisia's years of growing prosperity, the country's population has remained relatively stable.

答案是D。不明白，这算什么削弱？他因削弱么？

sayysong

题干的重点在于increasing consumption of meat，而meat又与grain相关，本地的grain产能不足，然后结论import gain。问weaken。即满足什么样的条件，才能降低grain的进口。
A meat和grain同时需求增长
B 将meat和income level联系起来
C 输出国的meat consumption没有增加 -- 相对来说不如D来的效果强
D 进口meat比gain更经济
E 人口保持平稳
比较下来就是D了。
(第一次讨论逻辑的问题，回答不到要点上的话莫怪。)

zanyingsan

题干的重点在于increasing consumption of meat，而meat又与grain相关，本地的grain产能不足，然后结论import gain。问weaken。即满足什么样的条件，才能降低grain的进口。
A meat和grain同时需求增长
B 将meat和income level联系起来
C 输出国的meat consumption没有增加 -- 相对来说不如D来的效果强
D 进口meat比gain更经济
E 人口保持平稳
比较下来就是D了。
(第一次讨论逻辑的问题，回答不到要点上的话莫怪。)

-- by 会员 sayysong (2009/12/14 18:58:08)

怎么比较的？因为D里面说了进口meat更经济，但是题干里没有比较说有跟经济相关的提示啊，比如说我们如果要削弱一个有关profit的结论通常会在选项里寻找money或者fee一类的敏感词眼，可是看这个答案我实在不明白。因为觉得跟题干没关联。犹豫了半天选了E，觉得人口保持平稳，那么meat的消耗应该也不会大幅上涨（这里我也用了假设所以不确定这个答案）。

sayysong

这么比较的
A meat和grain同时需求增长 ---- 同时进口meat和grain
B 将meat和income level联系起来 ---- 暗示进口meat（没有明确的提到import meat）
C 输出国的meat consumption没有增加 ---- 暗示进口meat(likely to import meat)
D 进口meat比gain更经济 ---- 明确进口meat
E 人口保持平稳 ---- 暗示进口meat和grain(因为grain可以产出meat，所以随便进口哪个或者两个都行)

sayysong

犹豫了半天选了E，觉得人口保持平稳，那么meat的消耗应该也不会大幅上涨（这里我也用了假设所以不确定这个答案）。

题干中有提到“a steadily increasing per capita consumption of meat”，所以即使人口平稳，meat的消耗量也是上涨的。

zanyingsan

题干中有提到“a steadily increasing per capita consumption of meat”，所以即使人口平稳，meat的消耗量也是上涨的。

-- by 会员 sayysong (2009/12/14 19:25:18)

恩，有道理，这也是我当时顾虑的原因，可是至于D，我现在只能是对着答案然后考虑因为gain要好多才能产生meat，所以进口gain也不一定能满足meat的需要，从经纪商考虑还是进口meat比较好，我只能说这是个他因削弱了。我找不到别的想法了。

rainbowmanutd

其实题目的argument就是要进口G。。weaken的话就说不需要进口G

熊熊加小怪

up
我直接一来就5个选项全排除。。
现在一想
原文推理是：meat消耗增加+meat需要grain来生产----》要进口grain了

削弱就是把meat需要grain来生产这给打断，meat消耗增加----》进口meat

不晓得这么理解对否~~~我怎么觉得不是他因削弱。。。