Transportation expenses accounted for a large portion of the total dollar amount spent on trips for pleasure by residents of the United States in 1997, and about half of the total dollar amount spent on transportation was for airfare. However, the large majority of United States residents who took trips for pleasure in 1997 did not travel by airplane but used other means of transportation.

If the statements above are true, which of the following must also be true about United States residents who took trips for pleasure in 1997?


Most of those who traveled by airplane did so because the airfare to their destination was lower than the cost of other available means of transportation.

Most of those who traveled by airplane did so because other means of transportation to their destination were unavailable.

Per mile traveled, those who traveled by airplane tended to spend more on transportation to their destination than did those who used other means of transportation.

Overall, people who did not travel by airplane had lower average transportation expenses than people who did.

Those who traveled by airplane spent about as much, on average, on other means of transportation as they did on airfare.

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考题讲解

情景：交通花费占据旅行总花费的很大比重，并且有一本的交通花费是花给了航空公司。但是，很大一部分旅游的人并没有通过飞机来旅行，而是用了其它的交通方式。

推理：通过本题的问题可知，它是演绎推理。

选题方式：略

选项分析：

A选项：大部分用飞机飞行的人这么做的原因是飞机的成本最低。

B选项：大部分用飞机飞行的人这么做的原因是其它的交通方式无法抵达他们的目的地。

C选项：平均每一英里的花费上，那些坐飞机的人比用其它交通方式的人花费了更多。本选项有些迷惑性。我们从推理文段中无法得知几种交通方式行进的英里数，因此，平均每一英里的花费就更加没法计算了。

D选项：Correct. 总的来说，不坐飞机旅行的人们比那些坐飞机旅行的人们有更低的平均花费。

E选项：那些坐飞机旅行的人们在航空方面的花费平均和他们用其它交通方式的花费相同。

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