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题库 / GMATAdvanced-CR-5
Columnist: Metro City has a lower percentage of residents with humanities degrees than any other city of comparable size in our nation. Nationwide, university graduates generally earn more than people who are not university graduates, but those with humanities degrees typically earn less than do graduates with degrees in other disciplines. So the main reason Metro City has higher income per capita than any other city of comparable size in our nation must be its low percentage of residents with humanities degrees.
Which of the following, if true, would most strengthen the columnist's argument?
Metro City residents with humanities degrees have higher income per capita than do people with humanities degrees in any other city of comparable size in the nation.
The percentage of residents with university degrees is lower in Metro City than in any other city of comparable size in the nation.
Nationwide, university graduates without humanities degrees typically earn more than do individuals without university degrees.
Metro City residents with degrees outside the humanities have per capita income no higher than the per capita income of such residents of other cities of comparable size in the nation.
In Metro City, a lower proportion of university graduates have humanities degrees than in any other city of comparable size in the nation.
B选项其实并没有加强结论，反倒是削弱。
有学历的比没学历的挣得多，但是M市有学历的人的比例反倒比同级城市的少，那么假设M市一个学人文专业的都没有，那M市怎么才能使得人均收入比同级城市的高呢？那只能是有学历的这波人，他们学的专业更赚钱。那B也就是削弱了题目的结论：M的人均收入高是因为M的读书人学的专业更挣钱，并不是因为学人文专业的比例小。
D选项，M市非人文专业的有学历的人的人均收入不比其他同级城市的非人文专业的有学历的人的人均收入高，那要使得整个M市的人均收入高，那只能低收入的人文专业的人占的比例小。
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