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标题: 讨论费费CR: 第21题 [打印本页]

作者: jq_jou 时间: 2003-9-20 16:27
标题: 讨论费费CR: 第21题
21. Historian: We can learn about the medical history of individuals through chemical analysis of their hair. It is likely, for example, that Isaac Newton’s psychological problems were due to mercury poisoning; traces of mercury were found in his hair. Analysis is now being done on a lock of Beethoven’s hair. Although no convincing argument has shown that Beethoven ever had a venereal disease, some people hypothesize that venereal disease caused his deafness. Since mercury was commonly ingested in Beethoven’s time to treat venereal disease, if researchers find a trace of mercury in his hair, we can conclude that this hypothesis is correct.
Which one of the following is an assumption on which the historian’s argument depends?
(A) None of the mercury introduced into the body can be eliminated.
(B) Some people in Beethoven’s time did not ingest mercury.
(C) Mercury is an effective treatment for venereal disease.
(D) Mercury poisoning can cause deafness in people with venereal disease.
(E) Beethoven suffered from psychological problems of the same severity as Newton’s.

正确答案是B), 但是我认为是D). B)对原文只有WEAKEN作用

作者: nina23 时间: 2003-9-22 01:34
我也觉得是D呀，，有没有高手出来讲解一下？

作者: fyhllj 时间: 2003-9-22 02:46
D is inference that you can get form this argument.
B is the assumption you have to count on, otherwise, you can not draw such conclusion.
对b取非，可对文章造成他因削弱。

作者: jq_jou 时间: 2003-9-22 05:24
对b取非得到的是: Some people in Beethoven’s time ingested mercury.

如果真要曲就这一点的话, 把B)取非以后得到的恰恰是原文需要的ASSUMPTION. 恐怕原来的B)恰好说反了吧.

作者: dorbear 时间: 2003-9-22 06:18
这是99年6月份的LSAT题。一个排除它因型的假设。

提取原文主干：在只要在头发中发现Mercury => 就证明患过venereal；我们需要找的是其成立的假设。

对(B) 的取非应该是：All people in Beethoven's time ingested Mercury. (very important! Look up some reference if any doubt.) 亦即发现 M 并不能推出一定患过venereal，因为所有人都用过M。

（D）是一个干扰选项，不是推论也不是假设，论述结构中没有Mercury 和Deafness的关联。

个人理解万岁！

作者: jq_jou 时间: 2003-9-22 11:26
标题: Thx so much!
希望所有回答问题的都能向你学习: 一针见血的指正问题.

原来我怀疑LSAT的一些答案不正确, 现在想想原来是自己没有吃透题目.能否麻烦你再帮我看这一题: 费费逻辑
28. Ordinary mountain sickness, a common condition among mountain climbers, and one from which most people can recover, is caused by the characteristic shortage of oxygen in the atmosphere at high altitudes. Cerebral edema, a rarer disruption of blood circulation in the brain that quickly becomes life-threatening if not correctly treated from its onset, can also be caused by a shortage of oxygen. Since the symptoms of cerebral edema resemble those of ordinary mountain sickness, cerebral edema is especially dangerous at high altitudes.
Which one of the following is an assumption on which the argument depends?
(A) The treatment for ordinary mountain sickness differs from the treatment for cerebral edema.
(C) Unlike cerebral edema, ordinary mountain sickness involves no disruption of blood circulation in the brain.

right answer is A), but i still think C) is ALSO suitable. 如果对C)取非, 那么: LIKE C.E., ordinary mountain sickness involves disruption of blood circulation in the brain. 他们就是一样DANGEROUS了. 什么地方不对呢?

当然:A 取非后也能证明原文不成立. 我的困惑是: 考试的时候如何正确的舍二取一而且保证正确呢?

[此贴子已经被作者于2003-9-22 12:01:52编辑过]

作者: dorbear 时间: 2003-9-22 12:32
99年10月LSAT考题：

提干：一种致命的疾病与一种不致命的疾病初期症状相同 =〉这种致命的疾病更可怕。

假设条件否定后，应该是命题不成立，而不能改变原来命题论据中主体（Mountain Sickness）的属性(Recoverable)。切记很多干扰选项都处在这一点。(C) 取反后否定了原来的论据，因此是错误的。

作者: jq_jou 时间: 2003-9-22 15:24
标题: Words cannot express my thx :-)
THX

作者: nina23 时间: 2003-9-25 05:33
very good dorbear!!

作者: lost_my_account 时间: 2004-7-5 22:01

以下是引用dorbear在2003-9-22 12:32:00的发言：
99年10月LSAT考题：

提干：一种致命的疾病与一种不致命的疾病初期症状相同 =〉这种致命的疾病更可怕。

假设条件否定后，应该是命题不成立，而不能改变原来命题论据中主体（Mountain Sickness）的属性(Recoverable)。切记很多干扰选项都处在这一点。(C) 取反后否定了原来的论据，因此是错误的。

一针见血。就是要在这两者之间建立关系。我本来选的A，想想真是奇怪，思考的时候就是像你这个思路，最后竟然会选A。

作者: ricky663 时间: 2004-9-15 13:20
到底是班主，讲的比较清楚

作者: foreinter 时间: 2005-9-4 23:41

以下是引用dorbear在2003-9-22 6:18:00的发言：
这是99年6月份的LSAT题。一个排除它因型的假设。

提取原文主干：在只要在头发中发现Mercury => 就证明患过venereal；我们需要找的是其成立的假设。

对(B) 的取非应该是：All people in Beethoven's time ingested Mercury. (very important! Look up some reference if any doubt.) 亦即发现 M 并不能推出一定患过venereal，因为所有人都用过M。

（D）是一个干扰选项，不是推论也不是假设，论述结构中没有Mercury 和Deafness的关联。

个人理解万岁！

请问对B的取非为什么是all people ingest M?在这里迷糊了。多谢

作者: xiaoniuren 时间: 2009-4-23 21:16
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