新人问题 关于12版OG45的解释以及断桥和他因到底是什么理解

风行稚

如题
45．Some anthropologists study modern-day societies offoragers in an effort to learn about our ancientancestors who were also foragers. A flaw in thisstrategy is that forager societies are extremely varied.Indeed, any forager society with whichanthropologistsare familiar has had considerable contact withmodern, non-forager societies.

Which of the following, if true, would most weaken the
criticism made above of the anthropologists' strategy?

(A)All forager societies throughout history have had
a number of important features in common that
are absent from other types of societies.

(B)Most ancient forager societies either dissolved
or made a transition to another way of life.

(0All anthropologists study one kind or another of
modern-day society.

(D)Many anthropologists who study modern-day
forager societies do not draw inferences about
ancient societies on the basis of their studies.

(E)Even those modern-day forager societies that
have not had significant contact with modern
societies are importantly different from ancient
forager societies.
看过答案逻辑链算是搞清楚了，但是下下来的一份笔记说选A的思路是“他因”， 难道不应该是断桥吗（说明了现代的F不会像有些人批评的的那样不能用于研究古代的F）
还有就是做题的时候的逻辑。。。lawyer牛的虽然大家都推荐好，但是好难懂，真心觉得看完陈向东和网上一些其他说法后weaken部分的思维开始混乱了，就是说具体上手的时候不知道改按哪个标准程序去判断
拿OG60来说
60.Red blood cells in which the malarial-fever parasiteresides are eliminated from a person's body after120 days. Because the parasite cannot travel to a newgeneration of red blood cells, any fever that developsin a person more than 120 days after that person hasmoved to a malaria-free region is not due to themalarial parasite.

Which of the following, if true, most seriously weakens
the conclusion above?

(A)The fever caused by the malarial parasite may
resemble the fever caused by flu viruses.

(B)The anopheles mosquito, which is the principal
insect carrier of the malarial parasite, has been
eradicated in many parts of the world.

(C)Many malarial symptoms other than the fever,
which can be suppressed with antimalarial
medication, can reappear within 120 days after
the medication is discontinued.

(D)In some cases, the parasite that causes malarial
fever travels to cells of the spleen, which are
less frequently eliminated from a person's body
than are red blood cells.

(E)In any region infested with malaria-carrying
mosquitoes, there are individuals who appear to
be immune to malaria.

答案大家都知道是D，就讲逻辑过程。按照陈的tips，原文提供了事实，推出原因，这样子想要weaken就得说原因错误。即要说“因此再被送到无菌区域后，任何持续120天以上的发烧都不是疟疾寄生虫引起的”错误，也就是要说还是是由寄生虫引起的，所以是D，这样子是分析得通的。但是如果按直接的断桥或者是他因分析，这个思路是什么就弄不明白了。感觉光靠tip是不行的，毕竟最基本的逻辑关系弄不清，光指望取巧有悖于gmac考察我们的初衷吧。。。

风行稚

顶自己。。。

风行稚

好吧，看了两天之后，自行解决了ORZ

水沫清凉

看08新东方的讲义看到60那道题，费允杰的断桥和他因看例题是懂的，但是应用还是不大会用_(:зゝ∠)_，这道题我自己的理解是

最后一句话：一个人超过120天去一个没有那啥虫的地方再发烧就不是这个虫的原因导致的了
前提——超过120天发烧
结论——不是这个虫的原因

A. flu viruses症状导致的发烧和那虫的类似——大概是想让人怀疑是其他病毒干的坏事吧，没有削弱
B. anopheles mosquito这个携带传播者已经大部分灭绝了————其他传播者，，不是那个虫，不相关
c. 用药治疗的暂时压制了但等药疗效过了又会重新出现其他症状——其他症状非fever，不相关
E.在那啥大肆滋生的地方，人们都免疫了——其实是支持结论，所以是个加强
答案D可能还有残留，对的