标题: 大关20-15的疑惑 [打印本页] 作者: monkeymaru 时间: 2009-11-18 21:57 标题: 大关20-15的疑惑 15. In the United States, vacationers account for more than half of all visitors to what are technically called “pure aquariums” but for fewer than one quarter of all visitors to zoos, which usually include a “zoo aquarium” of relatively modest scope.
Which of the following, if true, most helps to account for the difference described above between visitors to zoos and visitors to pure aquariums?
(A) In cities that have both a zoo and a pure aquarium, local residents are twice as likely to visit the aquarium as they are to visit the zoo.
(B) Virtually all large metropolitan areas have zoos, whereas only a few large metropolitan areas have pure aquariums.
(C) Over the last ten years, newly constructed pure aquariums have outnumbered newly established zoos by a factor of two to one.
(D) People who visit a zoo in a given year are two times more likely to visit a pure aquarium that year than are people who do not visit a zoo.（B）
(E) The zoo aquariums of zoos that are in the same city as a pure aquarium tend to be smaller than the aquariums of zoos that have no pure aquarium nearby.
这个题目是gmat题吗?真的感觉少条件啊.... 怎么可以自己靠判断来想呢？题目缺少assumption，我根本没敢选b，因为我觉得这需要大家自己判断那些vacation的人会去别人少去的场所...what if they don't? what if they prefer to stay home rather than go to aquarium...作者: genius_fang 时间: 2009-11-19 21:21
题目说去纯水族馆的有一半多，而去动物园的不到四分之一，即便动物园也有水族馆。解释：因为文章说的是度假者，那么对于度假者而言，他们去纯水族馆而不去动物园，很有可能就是他们所居住的城市有动物园，但没有纯水族馆，B就就提供了这么一个解释~