标题: 求助两道陈向东的《GMAT逻辑推理》里的几道假设题 [打印本页] 作者: Chanel800 时间: 2010-6-20 10:45 标题: 求助两道陈向东的《GMAT逻辑推理》里的几道假设题 书上这个选项没有答案。是不是选A？ An acre of average farmland produces only about 400 pounds of grain amaranth, as against 2400 pounds per acre, or six times as much, for wheat. It follows that whenever the grain-amaranth price is projected to be more than six times the projected price of wheat, farmers wishing to maximize profits will grow grain amaranth rather than wheat. The argument above is based on which of the following assumptions？ A) An acre's worth of grain amaranth is no more expensive to grow and bring to market than an acre's worth of wheat. B) There is no crop that produces a higher yield in terms of pounds harvested per acre than wheat. C) By choosing which crops to grow, farmers can exert a significant influence on the prices of those crops. D) Farmers are no less motivated by the desire to maximize profits than are other occupational groups. E) Prices of grain crops can change faster than farmers can change the acreage devoted to various grain crops.
还有这一道，这个题目和选项都读得不是很清楚。 It has been hypothesized that much of the matter in the universe is "dark", i.e., unseen. Studies have shown that galaxies in many galaxy clusters are moving faster with respect to one another than they would if visible stars constituted all their mass. The studies suggest that the galaxies are moving under the gravitational influence of unseen mass in considerable quantity. Which of the following is an assumption underlying the passage above? A) Measurements of the speed of moving galaxies are extremely unreliable. B) The workings of gravitational forces are not particularly well understood. C) The aggregate mass of visible starts in the galaxies mentioned above can be estimated with some confidence. D) The general composition of unseen matter in the universe has been determined. 这个答案是选C。
本人非N 仅供参考作者: Chanel800 时间: 2010-6-23 07:01
谢LS啦！作者: wj37044 时间: 2010-7-23 22:07
第一题我有疑问,如果A是假设的话,对A取非结论必不成立. 但对选项A取非.即an acre's acre worth of grain amaranth is expensive to grow and bring to market than an acre worth of wheat,好象结论可能成立,可能也不成立.好象grain 成本的昂贵程度与grain 的收入的上升程度之间的大小关系不知道. 所以我觉得A好象又不是答案了. 大家来讨论一下作者: buda 时间: 2010-7-23 22:29
In my opinion, A is right. B: crop that produces a higher yield, this has nonbusiness with the topic C:Farmers influence price has non business with the topic D:Farmer's motivation has non business with the topic Erice change has non business with the topic作者: wj37044 时间: 2010-7-23 22:52
能不能这样想,如果对A 取非后,前提就有2个差异了1)收入差异2)成本差异,但结论只考虑了1个差异,所以无意义.作者: bennywang2usa 时间: 2010-7-24 12:28
我记得关于第一题我自己总结了一个规律：凡是最后结论的落脚点在profit的，正确答案一般都是关于cost的，或者是赤裸裸地说钱的。作者: gmgmwll 时间: 2010-7-29 21:55
如果成本高的话,人们就比一定要选择种grain 了,也是对题中说种grain的一中削弱啊
if visible stars constituted all their mass.和 The aggregate mass of visible starts 是对应的作者: carnice 时间: 2010-7-29 22:24
第二题的C怎么解释，看不懂~~~~~作者: Bichenfei928 时间: 2010-7-30 20:47
哪里能找到这本陈向东的GMAT逻辑推理的解答啊？？作者: endlessstory 时间: 2010-9-25 09:39
我记得老师讲过，假设题取非后，对文章是削弱作用的就是答案
rice change has non business with the topic