问OG-132 A与C分辨不出来补上题目

MWY · 发表于 2003-7-25 21:46:00

132. Passengers must exit airplanes swiftly after accidents, since gases released following accidents are toxic to humans and often explode soon after being released. In order to prevent passenger deaths from gas inhalation, safety officials recommend that passengers be provided with smoke hoods that prevent inhalation of the gases.
Which of the following, if true, constitutes the strongest reason not to require implementation of the safety officials' recommendation?
(A) Test evacuations showed that putting on the smoke hoods added considerably to the overall time it took passengers to leave the cabin.
(B) Some airlines are unwilling to buy the smoke hoods because they consider them to be prohibitively expensive.
(C) Although the smoke hoods protect passengers from the toxic gases, they can do nothing to prevent the gases from igniting.
(D) Some experienced flyers fail to pay attention to the safety instructions given on every commercial flight before takeoff.
(E) In many airplane accidents, passengers who were able to reach emergency exits were overcome by toxic gases before they could exit the ariplane.

A 中“added time ittook passengers to leave the cabin”说的是增加了乘客逃出去的时间。
C 中“they can do nothing to prevent the gasses from igniting”说的是hoods无法制止气体燃烧爆炸。
不都是就文中的“and often explode soon after being released.”而反对officials的观点吗？
答案中对C为什么错的解释没看懂。

jerry_link · 发表于 2003-7-25 23:30:00

增加逃出去的时间是负作用

无法阻止爆炸是无作用（也就是既没积极但也没有相反的影响）

当然应该选A,它非但没有益处还带来坏的影响

MWY · 发表于 2003-7-26 22:51:00

谢谢，明白了。

albert · 发表于 2003-7-27 00:26:00

以下是引用MWY在2003-7-25 21:46:00的发言：
132. Passengers must exit airplanes swiftly after accidents, since gases released following accidents are toxic to humans and often explode soon after being released. In order to prevent passenger deaths from gas inhalation, safety officials recommend that passengers be provided with smoke hoods that prevent inhalation of the gases.
Which of the following, if true, constitutes the strongest reason not to require implementation of the safety officials' recommendation?
(A) Test evacuations showed that putting on the smoke hoods added considerably to the overall time it took passengers to leave the cabin.
(B) Some airlines are unwilling to buy the smoke hoods because they consider them to be prohibitively expensive.
(C) Although the smoke hoods protect passengers from the toxic gases, they can do nothing to prevent the gases from igniting.
(D) Some experienced flyers fail to pay attention to the safety instructions given on every commercial flight before takeoff.
(E) In many airplane accidents, passengers who were able to reach emergency exits were overcome by toxic gases before they could exit the ariplane.

A 中“added time ittook passengers to leave the cabin”说的是增加了乘客逃出去的时间。
C 中“they can do nothing to prevent the gasses from igniting”说的是hoods无法制止气体燃烧爆炸。
不都是就文中的“and often explode soon after being released.”而反对officials的观点吗？
答案中对C为什么错的解释没看懂。

[此贴子已经被作者于2003-7-26 11:45:31编辑过]

notice the evidence, conclusion and the relation between the evidence and conclusion...
here the target of the method is to prevent passenger deaths from gas inhalation
therefore, choice C is out of scope..
because "prevent the gases from igniting" is not the target..
focusing on the target is the key to solve this problem.

MWY · 发表于 2003-7-27 08:46:00

如果target是 prevent passenger deaths from gas inhalation的话，那么A不也是out of scope
了吗？
a 中“added time ittook passengers to leave the cabin”说的是增加了乘客逃出去的时间，因为题目中“explode soon after being released.“是说气体释放后会迅速爆炸，所以hood会使乘客在气体爆炸前没能逃出去。
题目中不单有“gases are toxic to humans“，还有“explode soon after being released.“这两个用and连接是并列的关系。a和c都是就后者而反对。

对 jerry_link 的解释，我又想了很久，还有一点不明，“无法阻止爆炸是无作用（也就是既没积极但也没有相反的影响）”，可题目里说气体释放后会迅速爆炸，那么hood的作用还是没解决根本性问题。与a选项相比较，只不过五十步笑百步而已。

coolgmat · 发表于 2003-8-8 05:19:00

The question is to find the strongest reason not to require implementation of the safety officials' recommendation. So, we expect to find that the recommendation won't work as the officals said or they will arise other problems.
Choice C confirms that the hoods can prevent the inhalation of the toxic gases, consistent with the official's recommendation. But Choice A states that the solution will endanger the passenger by longer delay.

Lorena · 发表于 2003-8-9 14:07:00

个人看法：
原文说：事故后乘客必须快速离开应为气体有毒且会很快爆炸。建议使用hood来防止吸入气体。
选项A，用hood会延长离开所需时间 ---削弱原文点出offical建议的缺陷
选项C，用hood能防止气体吸入（支持原文official的看法），却不能阻燃（原文并未对能否阻燃作做阐述，且此处不应该过多使用个人的推理）

cranberry · 发表于 2003-8-9 21:06:00

偶的看法：目的是迅速撤离，但撤离中会有毒气和爆炸的问题，但根本目的是迅速撤离，所以增加了撤离所需的时间，那么就和初衷根本违背，所以是A

MWY · 发表于 2003-8-10 18:11:00

谢谢各位的回贴,大家说的都有道理.这是我逻辑上的误区,以后会注意的.
再一次感谢以上各位的帮助.

jamesliu79 · 发表于 2004-8-12 21:16:00

看了CRANBERRY的解释,豁然开朗了!多谢了!

问OG-132 A与C分辨不出来补上题目