朋友们帮我解释一道逻辑吧~

奔奔宝贝 · 发表于 2014-1-3 13:57:30

A compelling optical illusion called the illusion of velocity and size makes objects appear to be moving more slowly the larger the objects are. Therefore, a motorist’s estimate of the time available for crossing a highway with a small car approaching is bound to be lower than it would be with a large truck approaching.

The conclusion above would be more properly drawn if it were made clear that the ______.

(A) truck’s speed is assumed to be lower than the car’s

(B) truck’s speed is assumed to be the same as the car’s

(C) truck’s speed is assumed to be higher than the car’s

(D) motorist’s estimate of time available is assumed to be more accurate with cars approaching than with trucks approaching

(E) motorist’s estimate of time available is assumed to be more accurate with trucks approaching than with cars approaching

答案是D，不是很明白题目表达的意思

奔奔宝贝 · 发表于 2014-1-3 18:24:26

help me,plz ~

奔奔宝贝 · 发表于 2014-1-3 18:33:48

走过路过，千万不要错过啊！

奔奔宝贝 · 发表于 2014-1-4 09:06:12

走过路过，千万不要错过啊！

isabella5858 · 发表于 2014-1-4 19:09:16

额如果没有做错答案应该是B吧
只有B排除了它因排除了本身速度不一致的问题保证了比较双方性质的一致性
前提：视觉上的错误：小的物体移动速度比大的慢 optical illusion：small object moves slower than large object
结论：所以摩托车司机在与轿车和卡车错车时，会觉得前者需要更久的时间 on highways, crossing with a small car would be slower than with a large truck.
那么如果本身两个车的速度就不一样呢？这会导致无法得到题目中的结论，所以B就排除了这样的情况。

希望可以帮到你

奔奔宝贝 · 发表于 2014-1-4 19:19:45

isabella5858 发表于 2014-1-4 19:09
额如果没有做错答案应该是B吧
只有B排除了它因排除了本身速度不一致的问题保证了比较双方性质的一致性
...

太谢谢你了，这个解释我很满意~

哈哈，我果真是没有理解题目的意思啊

[逻辑小分队] 朋友们帮我解释一道逻辑吧~

所属分类: GMAT考试

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