一些逻辑问题的分析

shencangbulu

楼主真的人品很赞,顶一下~!

shencangbulu

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.

呵呵 那我就不客气的问咯~ 嘿嘿
这题为什么选E啊？ 我虽然觉得E是对的没错，可是D也对呀！！！

-- by 会员 Lambton (2010/9/23 21:57:20)

我也来帮忙试试看,前两天刚看见过这题.我的理解是首先要看题目的推论,大集合是会enjoy serving preparing的,小集合是big eater.D的内容是原文没提到的信息,所以不一定错.题目问的是必定不为真的

请楼主指正.

aomeisoft7

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.

呵呵 那我就不客气的问咯~ 嘿嘿
这题为什么选E啊？ 我虽然觉得E是对的没错，可是D也对呀！！！

-- by 会员 Lambton (2010/9/23 21:57:20)

这题答案就是D~！
从最后一句话就可以推出来
这题问题的关键点是 CANNOT be true, 即“绝对是错的”


其他的4个选项很明显有漏洞，但是 “在某种条件下，是可能成立的”
比如E选项可能成立，题目并没有说 Gourmet cooks, fast-food cooks, and cooks  who are health food enthusiasts  这三种 cooks 就是 good cooks 的整体， 所以这三类都是 big eaters 是可能成立的（其他的某类 good cooks 不是big eaters）

aomeisoft7

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.

呵呵 那我就不客气的问咯~ 嘿嘿
这题为什么选E啊？ 我虽然觉得E是对的没错，可是D也对呀！！！

-- by 会员 Lambton (2010/9/23 21:57:20)

我也来帮忙试试看,前两天刚看见过这题.我的理解是首先要看题目的推论,大集合是会enjoy serving preparing的,小集合是big eater.D的内容是原文没提到的信息,所以不一定错.题目问的是必定不为真的

请楼主指正.

-- by 会员 shencangbulu (2010/9/23 22:33:11)

哈哈，你自己都把答案分析出来了怎么还说D不对呢
enjoy serving preparing 的 good cooks　　肯定比 big eater的 good cooks 多
再看D选项
D.    There are fewer good cooks who enjoy serving and preparing food than there are good cooks who are big eaters.
正好说反了么~~

xw909

“除非,今年新公司数目  >去年新公司数目”   这句话的原文在哪？

xw909

先谢谢ls

第一题我明白了，当时直接把A取非带进去感觉结论不对就选了。没仔细看后面的。

第二题 后来一想这就是个逆否命题。
hypotheis的内容是 this vaccine was the source of the virus found in mesotheliomas decades later
疫苗是1960年之后发现的m病毒缘由。这是在说1960之后只要有m就必然是v感染的。所以逆否的话：没感染v就没有m，所以E是加强。

不过捎带问个我当时做错的判断：hypotheis的说的“later"，所以我认为这件事要成立的条件是时间在1960之后，请问E并没有说时间，可不可以认为在1960之前这种hypotheis是不成立的呢？

-- by 会员 bdsjb116 (2010/9/22 21:38:30)

50年后的今天再看1960年的标本，还有virus，和现在病人的情况无关（没有你说的那么复杂吧？）

aomeisoft7

“除非,今年新公司数目  >去年新公司数目”   这句话的原文在哪？

-- by 会员 xw909 (2010/9/23 22:58:15)

unless a record number of companies start up this year, Derderia will not break its record for new jobs created.
在这儿呢~ a record number 就是说 今年新公司要 很多咯
这个结论的假设就是：平均每个新公司提供的岗位没有增多
如果 平均每个新公司提供的岗位 增加了，就不需要 新公司数目 的增加 啦


设新公司数n,  平均每个新公司 提供 a 个岗位，老公司提供 岗位 b
total = a*n + b
b 减少， 要使total 不减少， 所以：a增加  或 n增加  
题目结论是 n必须 增加
所以假设就是 a 不变

xw909

还是不明白，a record number of companies start up this year就说明了“今年新公司数目  >去年新公司数目”？

aomeisoft7

先谢谢ls

第一题我明白了，当时直接把A取非带进去感觉结论不对就选了。没仔细看后面的。

第二题 后来一想这就是个逆否命题。
hypotheis的内容是 this vaccine was the source of the virus found in mesotheliomas decades later
疫苗是1960年之后发现的m病毒缘由。这是在说1960之后只要有m就必然是v感染的。所以逆否的话：没感染v就没有m，所以E是加强。

不过捎带问个我当时做错的判断：hypotheis的说的“later"，所以我认为这件事要成立的条件是时间在1960之后，请问E并没有说时间，可不可以认为在1960之前这种hypotheis是不成立的呢？

-- by 会员 bdsjb116 (2010/9/22 21:38:30)

50年后的今天再看1960年的标本，还有virus，和现在病人的情况无关（没有你说的那么复杂吧？）

-- by 会员 xw909 (2010/9/23 23:07:04)

还是有关的吧.. 题目逻辑是，因为发现1960 vaccine 里有virus， 所以 推出 起源在那里
C选项仅仅说 这个样本带有virus          
而这个事例 不足以支持 题目的 因果结论

xw909

previously established companies 这个指的是什么啊？是（前年的公司），（还是前年公司+去年新开）？