享受生活，享受GMAT-明天该说再见了吧，亲爱的吉迈特mm

yakev6

Ving的总结：谢谢suri，bear等诸多大牛们啦。。。
http://forum.chasedream.com/GMAT_SC/thread-648003-1-1.html

附上mindmanager 介绍，超级赞赞赞

alan标记版bible

alan的语法构架
http://forum.chasedream.com/GMAT_SC/thread-736002-1-1.html

yakev6

二楼装修，放单词了。

枫若依旧

Lz好志向，加油，一起努力！

yakev6

formal logic... the soul of logical reasoning...

关于Assumption的总结：之前的总结削弱主要考虑的是形式上的削弱，如何能让结论成立的可能性降低。
可行的削弱方法有
1.指出逻辑漏洞
2.指出忽略因素


但是更深层次的考虑应该是站在作者的角度上，去考虑作者为什么从前提得到这个结论，前提是怎么支持结论的，中间有没有什么assumption？
找到这个assumption，削弱它就是逻辑上的削弱。万变不离其宗
Eg.
"Life expectancy" is the average age at death of the entire live-born population. In the middle of the nineteenth century, life expectancy in North America was 40 years, whereas now it is nearly 80 years. Thus, in those days, people must have been considered old at an age that we now consider the prime of life.
LE increase from 40 to 80 à old concept change.
Assumption:
lno other factor for LE.
lLE can repersent the old concept.
Weaken strategy: point out assumption is flawness.
lother factor exists.
lLE cannot repersent the old concept.
the survival rate or infant increase sharply from then to now.


Eg

Homeowners aged 40 to 50 are more likely to purchase ice cream and are more likely to purchase it in larger amounts than are members of any other demographic group. The popular belief that teenagers eat more ice cream than adults must, therefore, be false.

40 to 50 buy more à teenagers eat more is wrong.
Assumption:
lbuy= eat
lold people do not buy for the teenagers.
Weaken:
Point out buyer not equal to consumer.














同理，之前考虑的假设也限于了必要条件的概念，其实只要assumption不成立，结论成立的几率降低，那么该assumption也正确。
eg
In Swartkans territory, archaeologists discovered charred bone fragments dating back one million years. Analysis of the fragments, which came from a variety of animals, showed that they had been heated to temperatures no higher than those produced in experimental campfires made from branches of white stinkwood, the most common tree around Swartkans.

Which of the following, if true, would, together with the information above, provide the best basis for the claim that the charred bone fragments are evidence of the use of fire by early hominids?

compfires à hominids can use fire.

gap exist: 缺少H和fragment之间的联系，搭桥SA：和人相关。
(E)The bone fragments were found in several distinct layers of limestone that contained primitive cutting tools known to have been used by early hominids.

其实E就是假设，虽然看上去不是那么的必要，但是如果取非: 在碎骨片附近没有发现原始人的切割工具。很明显，该命题可以削弱结论，那么原论题就是假设。

yakev6

RC

CCcarol

加油！！！~

yakev6

队长。。。不好意思占了楼给SC用啦。
92. Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of the freshwater snails that are the parasite's hosts for part of its life cycle.
(A) the freshwater snails that are the parasite's hosts for part of its life cycle
(B) the freshwater snails that are the parasite's hosts in part of their life cycle
(C) freshwater snails which become the parasite's hosts for part of its life cycles
(Dl freshwater snails which become the hosts of the parasite during the parasite's life cycles
(E) parasite's hosts, freshwater snails which become their hosts during their life cycles
限定性和非限定从句的区分，split 掉CDE
B代词单复数错，也杀掉。
剩下A，但是A中存在it和its指代不同先行词的情况，查了曼哈顿得到的解释如下，
now check that those conditions apply here.
* "Schistosomiasis" and "it" are both SUBJECTS --> they are parallel --> we'll tolerate the ambiguity.
* "parasite's" and "its" are both POSSESSIVES --> they are parallel --> we'll tolerate the ambiguity.
this is a misinterpretation of the "possessive poison rule".

that rule ONLY forbids a NON-POSSESSIVE PRONOUN from standing for a POSSESSIVE NOUN.

ALL other combinations --
(1) non-possessive noun, non-possessive pronoun;
(2) non-possessive noun, possessive pronoun;
(3) possessive noun, possessive pronoun --
are OK.

this is case (3).

in general, you are better off forgetting all about the "possessive poison" rule.

this is a misinterpretation of the "possessive poison rule".

that rule ONLY forbids a NON-POSSESSIVE PRONOUN from standing for a POSSESSIVE NOUN.

ALL other combinations --
(1) non-possessive noun, non-possessive pronoun;
(2) non-possessive noun, possessive pronoun;
(3) possessive noun, possessive pronoun --
are OK.

this is case (3).

in general, you are better off forgetting all about the "possessive poison" rule.

irisya

楼主加油哇~ 同样刚开始的烤鸡er~ 一起加油~

yakev6

楼主加油哇~ 同样刚开始的烤鸡er~ 一起加油~

-- by 会员 irisya (2012/4/25 21:36:11)

谢啦。一起努力

CCcarol

我去去去去！！！