发晕的比例LSAT-15-2-18

snow_mountain · 发表于 2003-12-9 10:56:00

18. According to government official involved in
overseeing airplane safety during the last year,
over 75 percent of the voice-recorder tapes taken
from small airplanes involved in relatively minor
accidents record the whistling of the pilot
during the fifteen minutes immediately preceding
the accident. Even such minor accidents pose some
safety risk. Therefore, if passengers hear the
pilot start to whistle they should take safety
precautions, whether instructed by the pilot to
do so or not.
The argument is most vulnerable to criticism on
the grounds that it
(A) accepts the reliability of the cited
statistics on the authority of an unidentified
government official
(B) ignores the fact that in nearly one quarter
of these accidents following the recommendation
would not have improved passenger' safety
(C) does not indicate the criteria by which an
accident is classified as "relatively minor"
(D) provides no information about the percentage
of all small airplane flights during which the
pilot whistles at some time during that flight
(E) fails to specify the percentage of all small
airplane flights that involve relatively minor
accidents

答案D

一遇到这种比例的题目就头疼。80％做不对。

我对这条题目的理解是：论据发生小事故的小飞机75％与打假有关。结论：一听见飞行员打假，就要做准备。

D没问题，能想的通。可是E为什么不对？

照我想来，有多少小飞机会发生事故也很关键呀。要是小飞机发生事故的可能性很低，不是也能weaken?

请指教。

番茄炒蛋 · 发表于 2003-12-9 13:46:00

选项里面一定是要找出一个能够解释大叫和飞机出事之间的关系
如果是e，只能是说明了出事的比例，这和飞行员有没有发声音有什么关系啊
而原文的结论里和这个大叫有关的，所以e不足以作为一个缺陷提出来

snow_mountain · 发表于 2003-12-9 14:20:00

更不明白了。这样说吧，

出事的里面75％跟whistle 有关。D里面说的是飞行中有多少会whistle的比例。假如飞行员每次飞行都whistle, 那跟出事还是没关系呀。

E里面说的是飞行中有发生事故的比例。假设为A％，那么不是很容易知道整个飞行里会有多少跟whistle 有关了？

总飞行次数×A％×75％

更迷惑了....

Snazzy · 发表于 2003-12-9 14:21:00

right, but dont' that mean any possible answer must have teh information of WHISLING? THANKS

番茄炒蛋 · 发表于 2003-12-9 14:25:00

举个例子
每次飞机出事，飞行员都是穿了裤子的
所以我们以后坐飞机，看见飞行员穿了裤子开飞机我们就别坐了，因为飞机会出事
呵呵，看完这个例子，懂了吗

snow_mountain · 发表于 2003-12-9 14:53:00

你的例子其实是想说明whistle 与否可能更出不出事没关系。比如每个飞行员都whistle. 那么出不出事更whistle 不whistle 没一点关系。是吗？

番茄炒蛋 · 发表于 2003-12-9 15:17:00

没错

发晕的比例LSAT-15-2-18

发晕的比例LSAT-15-2-18

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