做更好的逻辑链训练—每日逻辑链练习意见征集，期待你的参与！

daisyの小夢想 · 发表于 2011-10-31 22:27:01

做更好的逻辑链训练，期待你的参与！

每日逻辑链练习由阅读小分队于2011.8发起，目标是提供一个共同钻研CR的平台，和广大战友们一起扎实提升逻辑基本功—快速阅读理解能力、提炼逻辑链简化信息能力以及合理推断能力。
逻辑小分队携手走过了近百个日夜，在练习中共同讨论，不断摩擦出逻辑思维的新火花，一群认真的朋友们一起坚持着每日艰苦的训练，亦一直努力地探寻着最高效的练习模式，在持久的磨练中慢慢感受逻辑的本质，享受玩转逻辑链的感觉。
GMAT是极其注重逻辑思维的考试，无论逻辑、阅读、语法，归根究底是在考取我们的逻辑思维能力。加之实战时的紧张心情，如果我们没有真实踏实地提升逻辑破题能力，很可能会影响我们CR部分的发挥。所以在这重要的一环上坚持显得尤为重要。
所以逻辑小分队真心地希望能与大家一起坚持每天的练习，探寻最高效、最彻底的方法与大家一起看透逻辑。在此，希望大家提出宝贵的意见，选择每日逻辑链练习的最佳提升方案。

请在投票栏选择你认为最佳的逻辑链练习方案，欢迎回帖共同探讨或提出更好的练习方案^^

意见反馈:
1. 很多战友反馈希望还是保留5道题左右的大题量，在此分享一下做题用时经验。
根据我们CR小分队长期的做题经验，如果按照分析最透彻的精练模式，一道题起码要花费20min时间来完成所有步骤(请注意下文提供的完整精练模式分析范例)，再加上讨论分析就需要更多时间来反思。如果按4道逻辑链练习+1道精练练习，我们估计要花费1hour。所以，我们才认为题目在精不在多，我们练习的主要目的不是用大题量来暴力提升，我们希望的是真的把一道题最大化地利用好，透彻地分析好，这样的思维分析过程对于锻炼逻辑思考方式和能力更为有效、重要。希望大家对此问题有更多feedback~

P.S.:
希望大家可以真诚的回答下面两个问题，这样不仅有助于我们改善CR版练习，也对于大家的CR提高是个帮助。谢谢！
1. 想了解大家每天练习逻辑并写出自己分析过程的同学愿意花费多少的时间在CD上？
2. 由于之前的CR逻辑已经是4+AA/AI，但是并没有很多同学来做题，所以也想了解一下有些同学没有把自己的分析写到CD上的原因？

往期：【每日逻辑链练习汇总贴】
http://forum.chasedream.com/GMAT_CR/thread-580862-1-2.html

逻辑小分队最新探究的精练模式：
(每天精练一道manhattan新题，全面提升破解CR所需要的各项能力。)
1. 计时看问题和题干，一般在45s内。
2. 先不看选项、不看题干按自己的理解写出逻辑链。
3. 合理推测正确选项的可能方向
4. 看选项，选出正确答案
5. 校对答案，对错误选项给出错误原因和类型的解释，对正确选项分析其与题干逻辑链的关系。

Example:
1. “Life expectancy” is the average age at death of the entire live-born population. In the middle of the nineteenth century, life expectancy in North America was 40 years, whereas now it is nearly 80 years. Thus, in those days, people must have been considered old at an age that we now consider the prime of life.
Which of the following, if true, undermines the argument above?
(A) In the middle of the nineteenth century, the population of North America was signi?cantly smaller than it is today.
(B) Most of the gains in life expectancy in the last 150 years have come from reductions in the number of infants who die in their ?rst year of life.
(C) Many of the people who live to an advanced age today do so only because of medical technology that was unknown in the nineteenth century.
(D) The proportion of people who die in their seventies is signi?cantly smaller today than is the proportion of people who die in their eighties.
(E) More people in the middle of the nineteenth century engaged regularly in vigorous physical activity than do so today.
（白色部分为隐藏选项）

跟帖练习示例（做比OG解释更透彻的CR分析）：
1) 计时：30s

2) 逻辑链Situation(刚开始练习先写好完整逻辑链，练习到逻辑链基本清晰的时候尝试尽量简化信息、提炼最精简的逻辑链)：
*完整模式：
Background Information:
Life expectancy is the average age at death of the whole population.
Premise:
Life expectancy in mid-nineteenth century North America was 40 years; now it is almost 80.
Conclusion:
What we think of as the prime of life must have been considered old in that earlier era.

简化模式：
Life expectancy in earlier era was 40 years, but now is almost 80.
Thus, what we consider young must have been considered old in that earlier era.

Example:
1. “Life expectancy” is the average age at death of the entire live-born population. In the middle of the nineteenth century, life expectancy in North America was 40 years, whereas now it is nearly 80 years. Thus, in those days, people must have been considered old at an age that we now consider the prime of life.
Which of the following, if true, undermines the argument above?
(A) In the middle of the nineteenth century, the population of North America was signi?cantly smaller than it is today.
(B) Most of the gains in life expectancy in the last 150 years have come from reductions in the number of infants who die in their ?rst year of life.
(C) Many of the people who live to an advanced age today do so only because of medical technology that was unknown in the nineteenth century.
(D) The proportion of people who die in their seventies is signi?cantly smaller today than is the proportion of people who die in their eighties.
(E) More people in the middle of the nineteenth century engaged regularly in vigorous physical activity than do so today.
（白色部分为隐藏选项）

跟帖练习示例（做比OG解释更透彻的CR分析）：
1) 计时：30s

2) 逻辑链Situation(刚开始练习先写好完整逻辑链，练习到逻辑链基本清晰的时候尝试尽量简化信息、提炼最精简的逻辑链)：
*完整模式：
Background Information:
Life expectancy is the average age at death of the whole population.
Premise:
Life expectancy in mid-nineteenth century North America was 40 years; now it is almost 80.
Conclusion:
What we think of as the prime of life must have been considered old in that earlier era.

简化模式：
Life expectancy in earlier era was 40 years, but now is almost 80.
Thus, what we consider young must have been considered old in that earlier era.

3) 推测(Prephrase: mentally formulate your answer to the question stem)：
the average age at death is 40 years≠the usual length of life is around 40
some other reasons that lead to the outcome:
极端值大, ?rst-year infant mortality was extremely high in earlier era.

4) 选项分析：选B
*选项解释不提供固定思路，请根据自己的理解对每一错误选项给出错误原因和类型的解释(无关选项思考清楚为什么无关)，对正确选项分析其与题干逻辑链的关系。

【附录】
*注意逻辑题干不一定仅仅是BG-->

remise-->Conclusion的模式，题干可能还会包括其他元素，所以逻辑链分析请根据题干分清每部分作用。
如何分辨题干中每部分作用请参考：
SDCAR2010【逻辑入门】（一）Arguments
http://forum.chasedream.com/gmat_cr/thread-563491-1-1.html
（二）More about Argument Components
http://forum.chasedream.com/gmat_cr/thread-564066-1-1.html

*Critical Reasoning学习资料：
1) owerscore GMAT Critical Reasoning Bible
Bible分类介绍了某类逻辑题型会出哪些类型的迷惑选项，正确选项有什么特征，argument中各成分的抽象名字等等，配套的课后习题也非常有针对性。看bible能快速培养你对逻辑的感觉，能让你建立逻辑的思想系统，让你知道不同的题型的关键点。lawyer的方法是bible的高度浓缩版。
GMAT Critical Reasoning Bible版本比较模糊。个人建议大家看LSAT Logical Reasoning Bible。根据仔细对照，GMAT Bible和LSAT Bible内容一致，习题也一样，只是GMAT Bible适当作了一定删减。
下载链接：
GMAT Critical Reasoning Bible 笔记整理版 by myaska
http://forum.chasedream.com/GMAT_Preparation/thread-599136-1-1.html?extparms=ThreadCatalogID%3d64%26page%3d1
附件：LSAT Logical Reasoning Bible

2) GMAT逻辑解题方法 by lawyer
http://forum.chasedream.com/GMAT_CR/thread-74525-1-1.html

3) SDCAR2010【逻辑入门】汇总
http://forum.chasedream.com/GMAT_CR/thread-571267-1-1.html

fox0923 · 发表于 2011-10-31 22:37:50

第一个来坐沙发！光顾这坐沙发了，最重要的差点忘记~~
除了daisy上面谈到的CR改版内容以外，我们也希望曾经做过我们逻辑小分队练习的同学发表一些不同意见，并且也非常欢迎你们可以和我们加入新一期的逻辑小分队每日一帖练习！

南瓜0729 · 发表于 2011-10-31 22:42:35

板凳~~~先占上

南瓜0729 · 发表于 2011-10-31 22:46:38

我一直是觉得现在的方法不就是精练题么？难道是我用的方法不对？
那原始题是什么方法呀？

daisyの小夢想 · 发表于 2011-10-31 22:59:13

我一直是觉得现在的方法不就是精练题么？难道是我用的方法不对？
那原始题是什么方法呀？

-- by 会员南瓜0729 (2011/10/31 22:46:38)

嘿嘿南瓜mm~ 其实是题目量的差别。如果我们都把心思集中在1题上，像悬赏令一样就更有助于深入分析、讨论。

diyangyang · 发表于 2011-11-1 00:03:15

辛苦咯~~daisy加油!!!

南瓜0729 · 发表于 2011-11-1 00:20:42

哦哦…明白啦… 借鉴语法专区的形式？？

daisyの小夢想 · 发表于 2011-11-1 00:23:18

哦哦…明白啦… 借鉴语法专区的形式？？

-- by 会员南瓜0729 (2011/11/1 0:20:42)

对的对的！就是要更透彻更彻底的分析把一道题目最大地利用好。

fox0923 · 发表于 2011-11-1 00:25:32

我一直是觉得现在的方法不就是精练题么？难道是我用的方法不对？
那原始题是什么方法呀？

-- by 会员南瓜0729 (2011/10/31 22:46:38)

原始题目我们没有精确的去练习每一道题目，只是依照大家的想法，把答案放进去，有人喜欢放上逻辑链就放了，而且也没有对错误答案进行全面分析。所以里面参杂了很多猜，矇的成分。实际上并不了解为什么是对的，所以这次我们不仅要把错误的答案分析明白了，还要重新考虑正确答案是怎么扣紧题干还有结论的。大家多谢讨论，把题目分析彻底，一定可以把CR搞上去！

UlysessHope · 发表于 2011-11-1 10:19:30

支持2+1

本贴相关题目 OG-12-CR-1 (UTUN)

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