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.

(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

请问哪里有问题？ 怎样才能想到正解思路而避免走偏呢？迷惑…

因为你的桥架错了 应该是在A和B之间架桥

尽管B是由缺氧而引起 A是由高海拔缺氧引起 看上去B和高海拔之间有差异  但题干中说A和B混淆时 B可能致命 其中就暗含此时B在高海拔情况下发生 （因为如果是在低海波情况下，就不会和A混淆），同时也已经暗含缺氧