两道Feifei逻辑请教

njit2007 · 发表于 2010-2-1 10:47:19

61. Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August.

Which one of the following is an assumption underlying the argument in the passage?

(A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems.

(B) Mechanical problems in airplanes have increased dramatically since last August.

(C) Mechanical problems in airplanes have not increased by 50 percent since last August.

(D) Airlines are less reluctant to report mechanical problems than they previously were.

(E) Mechanical problems in airplanes have become easier to detect since last August.

这一题的逻辑有点不太明白？

虽然能排除A,B,D,E，可是为什么选C

C选项和原文由什么逻辑联系？请大牛指教。

63. Some good cooks are gourmet cooks who pride themselves on always using extravagantly rich ingredients in elaborate recipes. Some good cooks can be characterized as fast-food cooks. They may use rich ingredients as long as the recipes are easy to follow and take little time. Other good cooks are health food enthusiasts, who are concerned primarily with the nutritional value of food. But even though not all good cooks are big eaters, they all enjoy preparing and serving food.

If the information in the passage is true, which one of the following CANNOT be true?

(A) Most good cooks do not use extravagantly rich ingredients.

(B) Everyone who enjoys preparing and serving food is a good cook.

(C) More good cooks who use extravagantly rich ingredients are big eaters than are good cooks who do not use such ingredients.

(D) There are fewer good cooks who enjoy serving and preparing food than there are good cooks who are big eaters.

(E) Gourmet cooks, fast-food cooks, and cooks who are health food enthusiasts are all big eaters.

这一题也是，我知道D肯定是错的

但是我也不确定其他为什么是正确的？

njit2007 · 发表于 2010-2-3 12:08:46

兄弟姐妹们，帮下忙啊

zhangmengdi · 发表于 2010-2-3 16:47:26

A.   文中第一句the fatal airplane crash last August已经客观存在，说明飞机旅行并非相当安全。与文中事实相反。
B.   用于识别和报告机械故障问题的更加严格的新规定已经生效，这才是the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August的真正原因。而B选项Mechanical problems in airplanes是它因，削弱结论。
C.   正确。“Mechanical problems in airplanes have increased by 50 percent since last August”是用他因来削弱结论，加上NOT，则是排除他因的假设。
D.   诉诸于航空公司的主观意愿，与过去相比较，都跟现在的情况无关。
E.   become easier to detect无关词。

zhangmengdi · 发表于 2010-2-3 16:52:01

A.   原文的第一句，从原文推出。
B.   从结论可以推出。
C.   推不出这种比较，无关。
D.   正确。结论：但是即使并非所有的好厨师是big eaters，他们却全都喜欢准备和供应食物。说明喜欢准备和供应食物的好厨师的人数更多，是big eaters的好厨师的人数相比较少。D选项与原文的结论相反。
E.   从原文推出。

shentuomi · 发表于 2010-2-3 22:37:29

我觉得可以用画圈圈法（集合的概念）来解这道题，这样包含关系可以很清晰
因为问的是CANNOT BE TRUE，所以剩下的选项虽然不是绝对的正确，但也绝不是CANNOT BE TRUE，ie：它们有正确的可能

shentuomi · 发表于 2010-2-3 22:39:02

楼上对于63的解释，c的解释不太对吧，如果画圈圈的话，c是可能的一种情况，并非无关

amberdeng · 发表于 2010-2-19 20:46:02

呼唤高人

61. Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August.

Which one of the following is an assumption underlying the argument in the passage?

(A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems.

(B) Mechanical problems in airplanes have increased dramatically since last August.

(C) Mechanical problems in airplanes have not increased by 50 percent since last August.

(D) Airlines are less reluctant to report mechanical problems than they previously were.

(E) Mechanical problems in airplanes have become easier to detect since last August.

这一题的逻辑有点不太明白？

虽然能排除A,B,D,E，可是为什么选C

C选项和原文由什么逻辑联系？请大牛指教。

同问，完全不理解为什么选C

63. Some good cooks are gourmet cooks who pride themselves on always using extravagantly rich ingredients in elaborate recipes. Some good cooks can be characterized as fast-food cooks. They may use rich ingredients as long as the recipes are easy to follow and take little time. Other good cooks are health food enthusiasts, who are concerned primarily with the nutritional value of food. But even though not all good cooks are big eaters, they all enjoy preparing and serving food.

If the information in the passage is true, which one of the following CANNOT be true?

(A) Most good cooks do not use extravagantly rich ingredients.

(B) Everyone who enjoys preparing and serving food is a good cook.

(C) More good cooks who use extravagantly rich ingredients are big eaters than are good cooks who do not use such ingredients.

(D) There are fewer good cooks who enjoy serving and preparing food than there are good cooks who are big eaters.

(E) Gourmet cooks, fast-food cooks, and cooks who are health food enthusiasts are all big eaters.

这一题也是，我知道D肯定是错的

但是我也不确定其他为什么是正确的？
同问。

-- by 会员 njit2007 (2010/2/1 10:47:19)

两道Feifei逻辑请教

解答61题。是费费逻辑详解版中的解释。

解答63题。是费费逻辑详解版中的解释。我还没做到60多呢，等做到了再看

63题

63题

所属分类: GMAT考试

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