标题: PREP 07飞机那题不懂为何选B 31643-!-item-!-188;#058&006431 [打印本页] 作者: toogy123 时间: 2012-4-19 13:12 标题: PREP 07飞机那题不懂为何选B 31643-!-item-!-188;#058&006431 36. (31643-!-item-!-188;#058&006431) 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? (A) Air Dacentaria's flight from Pederton to Dacenta is nonstop, whereas Southern Airways' flight touches down in Gorinda on the way. ---要求是安全性与无关nonstop 无关 (B) 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. (C) 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. ---要求是安全性与capacity无关 (D) 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. –无关 (E) Although the frequency of accidents is greater on Southern Airways, on both airlines the proportion of flights that have accidents is very small---不能削弱 答案选B 解释：B Correct。迫使作者对安全度做重新考虑 ACDE肯定不选， B我不是很明白，B说因为地形特殊from Pederton to Dacenta 地形飞机不同， 那也没有对比Air Dacentaria的情况啊， 为啥选B呢？ 求解 Thanks dears.作者: erok 时间: 2012-4-19 13:37
B算是干扰因素。 原题的推理过程是，一般情况下：SA比AD安全记录要差；现在：要从P飞向D，；结论：乘AD B是说，导致那个一般情况的原因是：除了从P到D这段飞行，都是机场的问题；而现在就是要从P飞向D，这时一般情况就不能推出结论了作者: toogy123 时间: 2012-4-19 13:46
我发现我是句子成分不过关导致做题理解错误， 我原来以为 which because of its mountainous location is one of the world's most dangerous. 指的是from Pederton to Dacenta 多山区这段山区很危险，
那这样看来Sarmouth airport, which because of its mountainous location is one of the world's most dangerous. 如果这样看which 指代机场， 机场危险， 那我就明白了，
多谢啦啊
Sarmouth airport, which because of its mountainous location is one of the world's most dangerous. 如果这样看which 指代机场， 机场危险， 那我就明白了，
