conclude题经验交流

theonlyone

LSAT3,Section I,19

19. The efficiency of microwave ovens in destroying the harmful bacteria frequently found in common foods
is diminished by the presence of salt in the food being cooked. When heated in a microwave oven, the interior
of unsalted food reaches temperatures high enough to kill bacteria that cause food poisoning, but the interior
of salted food does not. Scientists theorize that salt effectively blocks the microwaves from that salt
effectively blocks the microwaves from heating the interior.
Which one of the following conclusions is most supported by the information above?
(A) The kinds of bacteria that cause food poisoning are more likely to be found on the exterior of food than
in the interior of food.
(B) The incidence of serious food poisoning would be significantly reduced if microwave ovens were not used
by consumers to cook or reheat food.
(C) The addition of salt to food that has been cooked or reheated in a microwave oven can increase the danger of food poisoning.
(D) The danger of food poisoning can be lessened if salt is not used to prepare foods that are to be cooked in a microwave oven.
(E) Salt is the primary cause of food poisoning resulting from food that is heated in microwave ovens.

答案为D，C为什么不对？

atongmu

C扩大推理范围，提干没有涉及The addition of salt to food that has been cooked or reheated的问题。（好比：敌敌畏是致命的，这句话没有涉及多少敌敌畏是致命的，如果你得出结论是多喝1L的敌敌畏会更致命就是错误结论）

tip：conclude题型错误无非2种，无关或扩大推理范围。正确答案一般2种，原文的逆否命题，或原文A>B+B>C，结论是A>C。

中国人的思维强调“言下之意”，这种思维方式在作这类题型时十分有害，一定要克服。（我曾经让一个老外作GRE/Gmat逻辑题，其他题型正确率和中国人差不多，但conclude题从来不错，被他认为是最简单的题目。这就是思维方式的区别）

[此贴子已经被作者于2003-4-14 15:23:17编辑过]

StephanieYun

班祝有见地哦,想必是很有体会的, 我觉得斑竹写这个贴子挺有意义哦. 班祝可以多介绍点类似的经验归纳, 也让我学学啊






愚见

生活似一杯清茶

atongmu

以下是引用StephanieYun在2003-4-14 22:07:48的发言：
班祝有见地哦,想必是很有体会的, 我觉得斑竹写这个贴子挺有意义哦. 班祝可以多介绍点类似的经验归纳, 也让我学学啊

我正在做相关的整理工作。但一个人的力量毕竟是有限的，我希望广大战友能一起分享自己的经验。
我希望我们的bbs不仅仅是一个题目问答的论坛，而是应该成为大家学习提高，共享经验的家园。我相信只有真正的付出，才会有更大的收获！

StephanieYun

Re

theonlyone

谢谢atongmu

ivymin

the answer of the host is general,thanks!   To this question , the opinion of the original text is  that the salt in the food cooked in the ovens prevent the bacteria from being killed,but the answer  C  means that the salt increase the danger of the food poisoning.

siebel

以下是引用atongmu在2003-4-14 11:44:03的发言：
tip：conclude题型错误无非2种，无关或扩大推理范围。正确答案一般2种，原文的逆否命题，或原文A>B+B>C，结论是A>C。

中国人的思维强调“言下之意”，这种思维方式在作这类题型时十分有害，一定要克服。（我曾经让一个老外作GRE/Gmat逻辑题，其他题型正确率和中国人差不多，但conclude题从来不错，被他认为是最简单的题目。这就是思维方式的区别）

有见地！佩服佩服！

坚决支持无关选项应予排除，可如何判断 是否有关 实在不是一件容易的事儿？比如下面LSAT 17-1-4这道题。答案是D。其他选项容易排除，但我现在不明的是：原文并没有提到it is in the interests of a nation的事儿，为什么是相关的呢？原文哪个信息点和这个相关呢？总不至于要用“常识”来判断吧。谢谢！

17-1-4. The theory of military deterrence was based on a simple psychological truth, that fear of retaliation makes a would be a aggressor nation hesitate before attacking and is often sufficient to deter it altogether from attacking. Clearly, then to maintain military deterrence, a nation would have to be believed to have retaliatory power so great that a potential aggressor nation would have reason to think that it could not defend itself against such retaliation.

If the statements above are true, which one of the following can be properly inferred?

(A) A would-be aggressor nation can be deterred from attacking only if it has certain knowledge that it would be destroyed in retaliation by the country it attacks.
(B) A nation will not attack another nation if it believes that its own retaliatory power surpasses that of the other nation.
(C) One nation's failing to attack another establishes that the nation that fails to attack believes that it could not withstand a retaliatory attack from the other nation.
(D) It is in the interests of a nation that seeks deterrence and has unsurpassed military power to let potential aggressors against it become aware of its power of retaliatory attack.
(E) Maintaining maximum deterrence from aggression by other nations requires that a nation maintain a retaliatory force greater than that of any other nation.