一道PREP破解的逻辑 纠结半死

wjk

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.

(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.

(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.

(E) Although the frequency of accidents is greater on Southern Airways, on both airlines the proportion of flights that have accidents is very small.
答案：B
B说大部分SA的航班用S这个机场，是非常危险的机场，但从P到D的航班不用，能反驳旅客关于不坐SA航班的观点吗？就算不用这个危险机场，但还有可能不安全的吧 求指点啊，不明白 还有，E错在哪呢？

何小媛159753

旅客说选择S机场去P到D因为它更安全

B项说S机场是除P到D之外的其他航线危险，所以削弱

题目中说S机场的经常出事故（绝对量）而且很事故很严重
E项说两个机场的事故率（相对量）都很小，并不能说明S机场安全啊，因为另一个机场不但事故率小，而且不经常出事故，严重性也比S机场小，更能说明Air Dacentaria 机场安全啊

不知道讲明白了木？

米小咪

首先我得跟你握手，这道题我已开始也错了，想了半天没明白，后来我是这么觉得的：
题干说SA在事故频率和严重性方面都比AD多
而B选项告诉我们除了 Pederton to Dacenta这趟线，一般SA都用S机场，超级危险的机场 由此可以推测出 SA的大部分事故都是因为用了这个机场才发生的。所以如果Pederton to Dacenta这趟线不用S机场了，安全性就高上去了
所以可以削弱