题目内容：
When a population doubles, the country involved needs twice as much of everything, including ______.
A) hospitals and medicines
B) schools and students
C) food and manpower resources
D) all of the above
参考答案：【答案仅供学习，请勿对照自行用药等】
选择题：When a population doubles, the country involved needs twice as much of everythin
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- 题目类型：选择题
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