一类问题的解题思路请教

albert · 发表于 2003-5-22 01:15:00

我现在最头痛的逻辑题就是在SUPPORT和WEAKEN上，选项经常是一些看起来没关系的事情。。但是它又起着一定的SUPPORT或者WEAKEN。。如何鉴别是SUPPORT或者WEAKEN，还是无关呢？？？必要条件难道不能做为SUPPORT吗?

我对SUPPORT或者WEAKEN的理解是：只要往ARGUMENT 相同/相反的方向说，就是SUPPORT/WEAKEN，虽然有时候很弱。。。这类题好象GMAT里面很多。
？

我把几个相关的题目列出来，请指教：
12. a recent study found that snoring, though not common in either group, is more common among smokers than among nonsmokers. on the basis of this evidence, the author hypothesized that smoking by itself can induce snoring.
which one of the following, if true casts the most doubt on the author's hypothesis?
(a) stress induces both snoring and smoking in certain individuals.
(b) obesity induces many individuals to smoke
(c) most snorers do not smoke
(d) most smokers do not snore.
(e) both smoking and snoring cause throat problems.
answer: a why not d?
我觉得D对结论：吸烟导致SNORE有削弱作用。。虽然D不一定导致结论。。

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.
answer: E
D我觉得起着SUPPORT的作用，虽然很弱。

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。

一类问题的解题思路请教

一类问题的解题思路请教

所属分类: GMAT考试

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