求解一道逻辑题

Chrislvzh · 发表于 2011-4-7 20:49:21

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.

选a 求解,谢谢~

sdcar2010 · 发表于 2011-4-7 20:54:29

This is an old LSAT question.

Necessary assumption. Use negation.

If you negate A, you have: The treatment for ordinary mountain sickness is the same as the treatment for cerebral edema. If so, CE is not especially dangerous at high altitudes since it is curable even if it is mistaken with MS. The arguement falls apart. A is correct.

dengts · 发表于 2011-4-7 21:00:35

If you negate A,then you get "the treatments for ordinary mountain sickness and for cerebral edema are the same".As a result,if the symptom of cerebral edema appears and if we consider it of ordinary mountain sickness,we can still use the treatment of ordinary mountain sickness.Consequently,cerebral edema is NOT especially dangerous at high altitudes.

Chrislvzh · 发表于 2011-4-7 21:04:48

谢谢...!

小MMM · 发表于 2023-4-20 21:52:20

高海拔低氧，造成爬山病，很普遍可以好。CE这个病可致死，也由缺氧造成。CE和爬山病的症状很像，所以CE在高海拔时尤其危险。找假设。
类比型。原文隐藏的是，爬山病在高海拔不危险。那我要说的其实是，二者不同，二者不类似。A很直接说二者differ。
A，取非，如果治疗CE和治疗爬山病的方法一样，那么在高海拔得了CE就直接用爬山病的方法治疗，就不会especially dangerous了。否定了结论。正确答案。
错选：觉得treatment是无关选项。
备注：什么叫especially dangerous？就是救不活，那么就应该自然而然想到选项会说治疗方法。

求解一道逻辑题

所属分类: GMAT考试

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