请教陈向东 P465 2 3题

逛CD很久了，今天第一次发帖呵呵。

今天做到陈向东那本黄皮书的冲刺训练11，打击颇大，前几天刚建立起来的信心瞬间瓦解，前面做的还算好，百分之八十多的正确率吧，可是从第十套开始，越做越错。。11套经错了8个！！！！！真的是欲哭无泪啊。。。哪位牛牛能告诉我到底是怎么回事啊！！？？

伤心事先不提，先贴出其中两题来，真的是百思不得其解：

2、A study of adults who suffer from migraine headaches revealed that a significant proportion of the study participants suffer from a complex syndrome characterized by a set of 3 symptoms.Those who suffer from the syndrome experienced excessive anxiety during early childhood.as adolescents,the people approached the age of 20,thy also began to experience recurring bouts of depression.Since this pattern is invariant,always with excessive anxiety at its beginning,it follows that excessive anxiety in childhood is one of the causes of migraine headache and depression in later life.

The reasoning in the argument is vulnerable to criticism on which of the following grounds:

B.It fails to rule out the possibility that （not）all of the characteristic symptoms of the syndrome have a commom cause.

D.It fails to demonstrate that the people who participated in the study are representative of migraine sufferers.

答案选B，但我觉得B根本就是说反了，如果  加上那个红色的not才对吧。我反而觉得D对，D说被研究着不具代表性，而文中正是只说了“被研究着中有很大比例”（a significant proportion of the study ）。。。我的理解哪里错了啊？？

还有第三题，A选项根本就是无关选项啊。。。。

今天刚报了7月16号的上海场，这样下去我怎么能考好啊！！！！！！

B should be logically chosen.

If you look at " that excessive anxiety in childhood is one of the causes of migraine headache and depression in later life".

So ,  all the possibility of that all of the characteristic symptoms of the syndrome have a commom cause can be ruled out, otherwise we can not assume that is one of the reasons.

Thanks a lot!!!

lz 请问陈向东的逻辑书怎么样？我正准备买一本，看cd上大家都在讨论GWD的逻辑，不知道该不该下手啊？谢了先！！！

刚是你给我发的短消息吧？我刚回了。。。

仔细看了一下题，感觉还是不对。

这个题我看懂了，其错在将一开始出现的现象（A）always with excessive anxiety at its beginning与后来出现的现象（B）migraine headache and depression in later life构成了错误的因果关系。也就是其实啊A跟B只是两个平行的现象只是出现时间不同罢了，缺陷在于作者没有构建起A跟B的因果关系。

可是，B也没有把关注点放到这上面啊。。（或者说B对我来说太难理解了，还请指正）

而D，指出了另一个缺陷，也不能说不对啊。

考试的时候会有这么难吗？要有的话，真的是要崩溃了。。。