请教狒狒28（没有人问过）

28. Ordinary mountain sickness, a common condition among mountain climbers, and one from which most people can recover, is caused by the characteristic shortage of oxygen in the atmosphere at high altitudes. Cerebral edema, a rarer disruption of blood circulation in the brain that quickly becomes life-threatening if not correctly treated from its onset, can also be caused by a shortage of oxygen. Since the symptoms of cerebral edema resemble those of ordinary mountain sickness, cerebral edema is especially dangerous at high altitudes.

Which one of the following is an assumption on which the argument depends?

(A) The treatment for ordinary mountain sickness differs from the treatment for cerebral edema.

(B) Cerebral edema can cause those who suffer from it to slip into a coma within a few hours.

(C) Unlike cerebral edema, ordinary mountain sickness involves no disruption of blood circulation in the brain.

(D) Shortage of oxygen at extremely high altitude is likely to affect thinking processes and cause errors of judgment.

(E) Most people who suffer from ordinary mountain sickness recover without any special treatment.

答案选A

这道题目先讲了ordinary mountain sickness怎么样的，然后又讲了cerebral edema是怎么样，它们两者有共同点就是symptoms of cerebral edema resemble those of ordinary mountain sicknes，所以如果不当心的话，就容易把cerebral edema 看成是ordinary mountain sickness那样的话is especially dangerous at high altitudes.

A.        选项，提出了一个假设，就是他们两者的医疗方法不同，因为如果相同的话，用治疗普通登山症的方法也可以治cerebral edema，就不会有危险了

B.         无关选项

C.         讲普通的登山症怎样，文中已经讲了，不是什么前提

D.        无关选项

E.         无关选项

The answer should be A, 

the mountain climber know very well how to treat ordinary mountain sickness, since the symptoms are the alike, if they treat cerebral edema the same way as they treat ordinary mountain sickness, the danger of cerebral edema would be especially dangerous at high altitudes.

B,C :the description of B,C doesn't show any difference on high altitudes.

D : 'thinking processes and cause errors of judgment' were never mentioned in the description. It could be an answer, but the not so good as A.

E didn't answer why 'cerebral edema is especially dangerous at high altitudes'.

我的问题是：E选项为什么不可以？如果人们以为自己得的是ordinary mountain sickness而不采取任何治疗措施的话，不是也会很危险吗？

请教啦~

感觉这道题可以用搭桥来看。

说道了O的症状和治疗方法，C的症状和治疗方法，又说了O&C的症状一样，但是在相同情况下（高原）C比O危险。就差在两者症状之间搭个桥了，再读题目的时候应该能够估计出答案有这么一项。：）

FF中的解释用assumption的取非法也很明白，如果两者症状，治疗方法都一样了，在同一环境下就不应该存在不同的危险程度了。

E的选项（1）没有给原文中唯一的一点逻辑的漏洞搭桥。（2）取非以后并不能够使结论不成立。

感觉如果没有选项A,那么E也对.

但是A和E比较后,A肯定更好.所以就选A了.

我是这么理解的.

个人认为此题有两个Assumption：

1）A选项；

2）O往往不会进行treatment.

E不能表达2）的意思，如果把E改成Most people who suffer from ordinary mountain sickness will not get any special treatment 应也可为答案。

选择一个就够了。