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题目内容
（西安石油大学大学英语二）
A large population may mean _________.(本题1.0分)
A、 higher productivity, but a lower average income
B、 lower productivity and a lower average income
C、 higher productivity and a higher average income
D、 lower productivity, but a higher average income
A、 higher productivity, but a lower average income
B、 lower productivity and a lower average income
C、 higher productivity and a higher average income
D、 lower productivity, but a higher average income
参考答案