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请教feifei-28-->bigmouse转移

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楼主
发表于 2005-6-28 16:12:00 | 只看该作者

请教feifei-28

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


我想来想去,总是认为答案C比答案A更正确,因为如果ordinary mountain sickness和cerebral edema 一样involves no disruption of blood circulation in the brain. 那么,cerebral edema is especially dangerous at high altitudes了呀!



请NN帮助指出我的思路的错误之处。谢谢!



沙发
发表于 2005-6-28 16:55:00 | 只看该作者

我当时也掉进去了,但是仔细想一下:Since the symptoms of cerebral edema resemble those of ordinary mountain sickness, cerebral edema is especially dangerous at high altitudes. 说的是因为症状相同,CE可能被误诊为mountain sickness,但是后者多数都能恢复,而CE如果没有及时治疗可能危及生命,所以才特别危险。因此,A取非,二者的治疗方法如果相同的话,就没有这个危险了

板凳
发表于 2005-6-28 19:16:00 | 只看该作者

Anyway you don't know what kind of disruption of blood circulaion it is, even if ordinary mountain sickness involves a kind of disruption. And the stem says that most mountaineers can recover from mountain sickness, but cerebral edema can quickly become life-threatening.


So C could not be an assumption.


A looks like the key much more than C. Because even if one can tell the symptoms of both from each other, cerebral edema couldn't threaten a life if both diseases can be treated in the same way. But given their treatments are different from each other, cerebral edema is actually dangerous if a doctor can tell them from each other.

地板
 楼主| 发表于 2005-6-29 08:39:00 | 只看该作者

thank you for your good explanation,dphxmg.

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