prep 2-31这个题大家帮帮忙谢谢

31.   (31265-!-item-!-188;#058&006121)

The symptoms that United States President Zachary Taylor began showing five days before his death are consistent with arsenic poisoning.  Recent examination of Taylor's bones, however, revealed levels of arsenic comparable to those found in the bones of Taylor's contemporaries.  These levels are much lower than the levels of arsenic that remain in the bones of arsenic poisoning victims who live for more than a day after ingesting a lethal dose of the poison.

Which of the following is most strongly supported by the statements given?

(A) The symptoms that Taylor began showing five days before his death are consistent with poisoning other than arsenic poisoning.

(B) Taylor's death was not the result of any kind of poisoning.

(C) The symptoms that Taylor began showing five days before his death were not caused by a lethal dose of arsenic.

(D) The symptoms that Taylor began showing five days before his death grew more severe each day.

(E) It is unusual for a person who has ingested a lethal dose of arsenic to survive for more than a day.

复习了这么久还这么菜，真的想去撞墙了

既然这个总统骨头里毒药比那些人少（这些人2天就死了），5天死很正常啊

谁帮忙讲讲这题的逻辑思路啊？谢谢！

say-

T总统 死前五天 呈现出的症状 和 a中毒 的比较像

研究t的骨头，发现a含量和正常人差不多  （comparable to those found in the bones of Taylor's contemporaries） 是不是这样解释？——我觉得从这句话就可以判断，其实死因不是a中毒了 但存在一种可能 就是虽然因为a中毒而死，但死后a在bone的含量自动减低了，就是查不出来。

下一句话排除这种可能

说，t 骨头中的a含量 要比那些a中毒的人要少的多，

These levels are much lower than the levels of arsenic that remain in the bones of arsenic poisoning victims who live for more than a day after ingesting a lethal dose of the poison.

至于这句话 我觉得mm的理解“总统骨头里毒药比那些人少（这些人2天就死了）”

for more than a day  不能解释成 两天就死吧，应该也包括五天的 

这句的意思应该是confirm 上面那句，就是说 那些中毒而死的人，中毒身亡之后，骨头中的a含量不会减少。

所以t总统 死后bone中无a，即是说明非a中毒而死，之前的症状也不是a中毒引起的

这道题用了三分钟，虽然排除加懵对了，但是后来重新想了一下逻辑过程。

不知道对不对，nn指点

我就是觉得这个showing five days before his death 和who live for more than a day after ingesting 有点诡异

不知道这两个数字放在这里有什么用，于是我老想把他们联系起来，但是照上面MM的解释，好象去掉了也没有什么害处嘛？

窃以为 more than one day 应该包含  five day的

mm 哪天考？

 哦~~~ 生日？还是考试日期

我615考 生日621 ~~

看来咱俩的复习进度差不多

msn说吧，交流一下最后几天的安排 站短你 

考G的资料我都删了，当时也没看prep 破解的题，，，这题过去还真没见过，，，

选C吧？，，，选错了，就丢人了，，， - -||

我觉得有一个常识，你大概搞错了。人死了，就不会继续新陈代谢，所以中毒后死得越慢，骨头里的毒素越多，

另外骨头里的砒霜不会在死后分解的，否则开棺验尸就没意义了，是不是？

但是这道题，实在没必要去理会这些常识。你大概把逻辑题当阅读题作了

这道题，可以这么看，

第一句话，说  symptoms 是 arsenic poisoning

第二句话，Taylor's arsenic levels = that of his contemporaries，注意however

第三句话，说contemporaries' arsenic levels 不等于 lethal dose of arsenic poison levels

所以Taylor 不属于 poisoned by lethal dose of arsenic poison，

所以 symptoms 不属于 caused by lethal dose of arsenic poison

这道题属于经典的三段式逻辑，除了中间增加了一个contemporaries 的等价代换

这道题，一眼看上去，就应该注意两个关键点，5 days & lethal dose

但是注意选项，根本没提是不是5天，只有c 强调lethal dose，所以一下子就能确定，根本不需要搞清楚题目在说什么

其他四个选项，我觉得没什么迷惑度

a, b 强调的是不是arsenic ，而题设里一直都在说arsenic 而没提过 non-arsenic，所以肯定不对

d 在说病情演变，而题设一直在讨论中毒原因，显然无关

e，，，如果没有第二句话作铺垫，以及没有however，还是合理的，但是即便如此，也是在RC 题中合理，CR题是让你推论逻辑关系，不是推论作者思路，所以看都不用看，肯定不选它，，，

42.   (32943-!-item-!-188;#058&007554)

Researchers have found that when very overweight people, who tend to have relatively low metabolic rates, lose weight primarily through dieting, their metabolisms generally remain unchanged.  They will thus burn significantly fewer calories at the new weight than do people whose weight is normally at that level.  Such newly thin persons will, therefore, ultimately regain weight until their body size again matches their metabolic rate.

The conclusion of the argument above depends on which of the following assumptions?

(A) Relatively few very overweight people who have dieted down to a new weight tend to continue to consume substantially fewer calories than do people whose normal weight is at that level.

(B) The metabolisms of people who are usually not overweight are much more able to vary than the metabolisms of people who have been very overweight.

(C) The amount of calories that a person usually burns in a day is determined more by the amount that is consumed that day than by the current weight of the individual.

(D) Researchers have not yet determined whether the metabolic rates of formerly very overweight individuals can be accelerated by means of chemical agents.

(E) Because of the constancy of their metabolic rates, people who are at their usual weight normally have as much difficulty gaining weight as they do losing it.

既然楼上的这么怀念GMAT，能不能再帮偶看一道题啊，