标题: 有时候逻辑的答案真是匪夷所思。 [打印本页] 作者: foreverdr 时间: 2010-9-10 21:50 标题: 有时候逻辑的答案真是匪夷所思。 Traveler: Southern Airways has a far worse safety record than Air Dacentaria over the past few years, in terms of both the frequency of accidents and the severity of accidents. Therefore, although Air Dacentaria is slightly more expensive, I will choose it over Southern Airways for my flight from Pederton to Dacenta, since it is worth paying extra to have a safer flight.
Which of the following, if true, casts the most serious doubt on the traveler's argument? 1。Air Dacentaria's flight from Pederton to Dacenta is nonstop, whereas Southern Airways' flight touches down in Gorinda on the way. 2。 Most Southern Airways flights, but not its flight from Pederton to Dacenta, use Sarmouth airport, which because of its mountainous location is one of the world's most dangerous. 3。 For its flights from Pederton to Dacenta, Southern Airways uses a different model of airplane, with a smaller capacity, than the model Air Dacentaria uses for its flights on the same route. 4。 Only in the last few years has the cost of flying from Pederton to Dacenta been more expensive on Air Dacentaria than on Southern Airways. 5。 Although the frequency of accidents is greater on Southern Airways, on both airlines the proportion of flights that have accidents is very small. 此题答案是B 我选的E 这B怎么理解 怎么选的？作者: wudiyeah 时间: 2010-9-12 00:55
WEAKEN题，此题答案用他因法解。 即导致Southern Airways 的事故比Air Dacentaria 多的原因是因为机场地形本身比较危险。但旅客所要搭乘的航班除外（并不使用那个机场）。——通过其他原因解释了造成Southern Airways 事故多不安全的表象。