关于逻辑中数量范围的问题

surrender

E选项也有漏洞啊，原文说ozone entirely filters out some wavelengths of light but lets others through，那么有可能ozone会let through所有对眼睛有害的光波，因此无论ozone有无漏洞，这些光波都不受影响。因此E也就不对了。
不知道这样思考有什么问题？

gato

many some 是一样的，many 从1-100 ,most 51-000 第一次见到，受教了。

Maykey

选E，基本上都是量词的地方出错

angelsandy

叫我西瓜

Bible上的一道练习题
2. Last year, the government of country A imposed large tariffs on steel imports in
an effort to aid its domestic steel industry. Many domestic steel producers
enjoyed record profits as a result, as foreign steel producers were in many
cases unable to compete effectively under the burden of the newly imposed
tariffs.
Which of the following conclusions is best supported by the passage?
(A) Not all steel producers were unaffected by country A’s newly imposed
tariffs.
(B) Some foreign steel producers were able to compete effectively in country A
even after the new tariffs were imposed.
(C) After the new tariffs were imposed, most foreign steel producers were
unable to compete effectively with country A’s domestic steel producers.
(D) Most domestic steel producers were able to increase their profits after the
new tariffs were imposed.
(E) If a government intends to protect a domestic industry, the imposition of
tariffs on imports is generally an effective approach.

叫我西瓜

Q uestion #2: Must Be True. The correct answer choice is (A)
This stimulus presents a fairly straightforward scenario: the tariffs imposed on steel
imports by the government of country A have helped domestic steel producers
become more competitive and make record profits, because in most cases foreign
producers were unable to compete under the new tariffs. Note that there is no
conclusion present, and so this is a fact set, not an argument.
Answer choice (A): This is the correct answer. Since we know that domestic steel
producers benefited positively from the tariffs, and foreign steel producers were
affected negatively, it must be true that not all steel producers were unaffected.
Worded another way, answer choice A states “some steel producers were affected
by…[the] tariffs.”
As an aside, if, upon reading (A), you determined this was a strong answer, should
you have simply selected it and skipped reading the remaining answers? No, because
perhaps you misread (A), or perhaps there is a better answer among the remaining
choices. The only reason not to read the remaining choices would be if you were just
about out of time.
Answer choice (B): The stimulus tells us that “foreign steel producers were in many
cases unable to compete effectively under the burden of the newly imposed tariffs.”
This does not imply that some foreign steel producers were able to compete
effectively. Be careful not to assume that “some could compete” just because you
are not explicitly told “all could not compete.” Although this answer choice Could Be
True, it does not have to be true.
Answer choice (C): Again, we know that in many cases foreign steel producers could
not compete effectively, but we cannot know anything about the percentage of
foreign steel producers that could not compete effectively. Again, this answer choice
Could Be True, but it does not have to be true.
Answer choice (D): The stimulus states that “many” domestic steel producers
enjoyed record profits, but “many” does not necessarily equal “most” (or
“majority”). Logically speaking, “many” simply means “some,” unless you have
further information about the overall number under discussion (more on this in
Chapter Twelve).
Answer choice (E): This answer choice is much too broad in scope to be completely
supported by the information in the stimulus. We know that in country A these
particular tariffs helped to aid the domestic steel industry, but that is not sufficient
evidence to prove that tariffs are “generally an effective approach” to protecting any
domestic industry in any country.

feishaung090

http://forum.chasedream.com/foru ... amp;fromuid=1202235

laurachen310

The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.

Which one of the following is most strongly supported by the statements above, if they are true.

A). All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.
must be true的题必须要原文里面有支持-A选项根据原文无法推出
B). Few species of animals live on a part of the earth's surface that is not threatened by holes in the ozone layer
must be true的题必须是in the scope，这个选项是out of scope，文中根本没提，无法判断
C). Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight
这个选项out of scope
D). A single wavelength of sunlight can cause severe damage to the eyes of most species of animals
文中说的是many species而不是most species
E). Some wavelengths of sunlight that cause eye damage are more likely to reach the earth's surface where there are holes in the ozone layer than where there are not
这个选项正确

所以选E

小雪要上学

lawyer_1 发表于 2004-9-19 00:00
数量的范围是逻辑题常考，特别是MUST BE问题，混淆答案也常来于此。下面一题是LSAT，先讨论，后再公布答案 ...

e B没说eye