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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.
P：metro city的人均收入>相似大小的城市的人均收入（果）
C：humanities degree的居民的占比小（因）
果因推理，否定他因or加强因果关系，果必出现
所以就要说明：其他人收入也不高，无法拉高整体人均收入，于是只能是学hd的人少，即低收入的人少，整体才上得去
• AMetro 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. （取非加强：M城有这个degree的市民的人均收入不比别的城有这个degree的市民人均收入高，那有HD的人收入这么低的情况下M城的人均收入还这么高，说明HD的人的比例确实少，取非加强了原来的结论，所以是削弱项）
• BThe percentage of residents with university degrees is lower in Metro City than in any other city of comparable size in the nation. （取非削弱，M城的大学生比例比别的城市高，提出了果的他因，那么这个是加强选项；但其实这里忽略了有可能是因为M文理科工资都比其他城市高所以导致的平均收入高，没法得出文科的比例）
• CNationwide, university graduates without humanities degrees typically earn more than do individuals without university degrees. （问的是M城的人均收入和别的城比，这里提出了一个全国的现象，无关）
• DMetro 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. （正确，取非削弱，M城不学HD的大学生的收入比别的城的不学HD的大学生的收入高，这里提出了果的他因，加强选项；这里直接讨论了将HD抛出了大学生的讨论范围：你说不学HD的大学生收入高，好，那我们M城不学HD的大学生的收入也没比别的城市高，恰好说明M城的人均收入高就是因为学HD的人少些）
• EIn Metro City, a lower proportion of university graduates have humanities degrees than in any other city of comparable size in the nation. （这里说的是HD在M城的大学生里占比小，题目问的是HD在M城居民的占比，这里没法得知大学生在M城的占比，所以没法判断）
做对了，但是想了很久很久才想通，这道题值得多多揣摩
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