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The author is aiming to show that_____________.(本题1.0分)
A、 humans will run out of their food supply in the future
B、 it is necessary for humans to carry out a worldwide plan for birth control
C、 different nations have different views of population growth
D、 we need to take necessary measures to prevent the overuse of natural resources.

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出自：西安石油大学大学英语二

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