LSAT-16-2-3,LSAT-16-2-12,LSAT-16-2-19,LSAT-16-2-24

albert

LSAT16II 35分钟错了13道，好惨！
下面的是我回头看了还是不明白的题目，请各位帮忙啊！

3. A certain stain of bacteria was found in the stomachs of ulcer patients. A medical researcher with no history of ulcers inadvertently ingested some of the bacteria and within weeks developed an ulcer. Therefore, it is highly likely that the bacteria strain induces ulcers.
Which one of the following, if true, most supports the argument above?
(A) People who have the bacteria strain in their stomachs have been found to have no greater incidence of kidney disease that do people who lack the bacteria strain.
(B) The researcher did not develop any other serious health problems within a year after ingesting the bacteria strain.
(C) There is no evidence that the bacteria strain induces ulcers in laboratory animals.
(D) A study of 2000 people who do not have ulcers found that none of these people had the bacteria strain in their stomachs.

答案是E，LSAT里原题没有E选项。。我想问的是D为什么不对？好象也是SUPPORT啊，虽然比较弱的SUPPORT

12. Individual pyrrole molecules readily join together into larger molecules called polypyrroles. If polypyrroles form from pyrrole in the presence of zeolites, they do so by attaching to the zeolite either in lumps on the outer surface of the zeolite or in delicate chains within the zeolite抯 inner channels. When zeolite changes color from yellow to black, it means that on or in that zeolite polypyrroles have formed from pyrrole. Yellow zeolite free of any pyrrole was submerged in dissolved pyrrole. The zeolite, turned black even though no polypyrroles formed on its outer surface.
If the statements above are true, which one of the following must on the basis of them be true?
(A) Polypyrroles had already formed on or in the zeolite before it was submerged.
(B) Lumps of polypyrrole attached to the zeolite were responsible for its color change.
(C) At least some of the pyrrole in which the zeolite was submerged formed polypyrrole chains.
(D) None of the pyrrole in which the zeolite was submerged attached itself to the zeolite.
(E) Little, if any, of the pyrrole in which the zeolite was submerged reached the zeolite抯 inner channels.
答案C，为什么？

19. Without information that could only have come from someone present at the secret meeting between the finance minister and the leader of the opposition party, the newspaper story that forced the finance minister to resign could not have been written. No one witnessed the meeting, however, except the minister's aide. It is clear, therefore, that the finance minister was ultimately brought down, not by any of his powerful political enemies, but by his own trusted aide.
The argument commits which one of the following errors of reasoning?
(A) drawing a conclusion on the basis of evidence that provides equally strong support for a competing conclusion
(B) assuming without warrant that if one thing cannot occur without another thing s already having occurred, then the earlier thing cannot occur without bringing about the later thing
(C) confusing evidence that a given outcome on one occasion was brought about in a certain way with evidence that the same outcome on a different occasion was brought about in that way
(D) basing its conclusion on evidence that is almost entirely irrelevant to the point at issue
(E) treating evidence that a given action contributed to bringing about a certain effect as though that evidence established that the given action by itself was sufficient to bring about that effect
答案：A，为什么？ 我选了C

24. People were asked in a survey how old they felt. They replied, almost unanimously despite a great diversity of ages, with a number that was 75 percent of their real age. There is, however, a problem in understanding this sort of response. For example, suppose it meant that a 48-year-old man was claiming to feel as he felt at 36. But at age 16 he would have said he felt like a man of 27, and at 27 he would have said he felt just over 20, and so on into childhood. And surely, that 48-year-old man did not mean to suggest that he felt like a child!
Which one of the following techniques of reasoning is employed in the argument?
(A) projecting from responses collected alone time from many individuals of widely different ages to hypothetical earlier responses of a single individual at some of those ages
(8) reinterpreting what certain people actually said in the light of what would, in the circumstances, have been the most reasonable thing for them to say
(C) qualifying an overly sweeping generalization in light of a single well chosen counterexample
(D) deriving a contradiction from a pair of statements in order to prove that at least one of those statements is false
(E) analyzing an unexpected unanimity among respondents as evidence, not of a great uniformity of opinion among those respondents but of their successful manipulation by their questioners
答案： A 为什么？

siebel

我的eLsat答案是E。兄弟有多对一道！

siebel

22.我的eLsat答案是E。兄弟有多对一道！

albert

哦。。对。。。我看错答案。。又多对一道。。
谢谢siebel兄提醒.

albert

anybody give me a help?
thanks!

albert

is my question very difficult or very easy??
why no reply?
thanks

mindfree

1. 我认为D是支持bacteria为ulcer的必要条件, 而不是支持其为充分条件. 而原文的结论是bacteria造成ulcer. 谁能补出E?

2. 分析原文,可以得出以下关系: a. 在Z存在时,PY形成PO的方式有两种--1.lumps on the outer surface 2.chain within inner channel; b. 当Z变色时, 说明PY形成PO(或inner或outer). 现知道Z变色,且outer surface没有PO, 可以正推出必然有PO在inner形成. 既C

3. minister是和opposition party会谈, 所以很可能是opposition party leader将消息透露出去, 所以原文的evidence同样支持competing conclusion, 即"brought down by his powerful political enemies"

4. 为什么你认为不是A?

albert

谢谢MINDFREE
2. 3 题明白了。

1 题我想问的是在GMAT中，必要条件难道不能做为SUPPORT吗？我好象记得有很多很弱的SUPPORT，只要顺着ARGUMENT的意思走，起着支持的作用就算SUPPORT了。不是吗？

比如，我记得请教过你一道题：
11.A distemper virus has caused two-thirds of the seal population in the North Sea to die since May 1988. The explanation for the deaths cannot rest here, however. There must be a reason the normally latent virus could prevail so suddenly: clearly the severe pollution of the North Sea waters must have weakened the immune system of the seals so that they could no longer withstand the virus.
11. Which one of the following, if true, most strongly supports the explanation given in the argument?
(A) At various times during the last ten years, several species of shellfish and seabirds in the North Sea have experienced unprecedented steep drops in population.
答案A也是支持。。虽然很弱。能请教一下你判断选项是否为支持（或者WEAKEN）还是为无关的经验吗？？

4我根本不知道作者想说明什么。。你能大概解释一下原文和A选项吗？

非常感谢。

cecilechina19

第3题正确答案就是D,原题的E选项就是帖子里写的D的选项。

skyzhang

调查问卷问了很多人，包括

我48岁 说：我感觉自己像36岁

Bush 36说： 感觉自己27岁

Claire 27岁 说： 感觉自己18岁

小泉 18岁 说： 我感觉自己像 6岁

好了，作者说：由此我们可以推论出因为我48感觉36，一个36岁的人（Bush）说自己感觉27，一个27岁的说自己感觉18，一个18的人感觉自己6岁。   ——————》 得出我竟然感觉自己像6岁！！！

这个当然不可能了，所以作者觉得这个调查有问题，因为他推论出来的东西太荒谬了。

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那么以上作者的推论是用了什么方法呢？

A) projecting from responses collected alone time from many individuals of widely different ages to hypothetical earlier responses of a single individual at some of those ages

他把通过很多人（我，bush claire 小泉）收集的答案用在“假推”我这“一个”个体的回答。