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标题: 求教gwd-3-Q30 [打印本页]

作者: linbingcheng 时间: 2011-8-25 06:48 标题: 求教gwd-3-Q30

The percentage of households with an annual income of more than $40,000 is higher in Merton county than in any other county.However, the percentage of households with an annual income of $60,000 or more is highest in Sommer county.

If the statements above are true, which of the following can properly be concluded on the basis of them?

A No household in Merton county has an annual income of $60,000 or more.

B Some households in Merton county have an annual income between $40,000 and $60,000.

C The number of households with an annual income of more than $40,000 is greater in Merton than in Sommer county.

D Average annual household income is higher in Sommer than in Merton county.

E The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton county.

这题答案是B，但是我觉得E也很合理，M城市收入40000以上的人占的百分比最多，而S城市收入60000以上的人占的百分比最多，那么收入80000以上的人的百分比S大于M，不是很合理吗？因为M城市的人大多集中在40000到60000之间。不选B是因为这个不需要推啊……它只是说some并没有涉及M和S的比较嘛……

作者: coffee0921 时间: 2011-8-25 20:58

题干一：Merton城中，>40K的最多。
题干二：Sommer城中，>=60K的最多。
B.Some households in Merton county have an annual income between $40,000 and $60,000.
取非，如果Merton城中没有40K到60K这个区间的，那么就是>60K这一档，即题干一=Merton城中，>60K的最多。与题干二相悖，顾B正确。
E.The percentage of households with an annual income of $80,000 is higher in Sommer than in Merton county.
最大的问题在于80K这个数字毫无根据，按照你的理解，换成70K，90K都可以～
个人意见，仅供参考

作者: tracy214wxy 时间: 2011-8-28 19:38

这道题C为什么不对呢？
题干的第一句话就说了Merton county里，收入在$40000以上的人是所有county里最多的；
C说Merton County里收入在$40000以上的人比Sommer County收入在$40000的人多，通过上述题干不正好可以推出C吗？

作者: ChinaHawk 时间: 2011-8-29 06:17

C选项说的是绝对值，题目中给的是比例（M县收入超过4万的人口）

作者: sayysong 时间: 2011-8-31 06:29

E因为可能两个county都没有人有8K，所以percentage可能相等都为0

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