2. 考研
  3. This passage chiefly discusses ______. It took ______ for the world to increase its population from 1 billion to 4 billion.

This passage chiefly discusses ______. It took ______ for the world to increase its population from 1 billion to 4 billion.

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问题 This passage chiefly discusses ______.
It took ______ for the world to increase its population from 1 billion to 4 billion.
选项 A、100 years
B、145 years
C、1975 years
D、Over two million years
答案B
解析 事实推断题。在第二段中，作者介绍，世界人口于1830年达到十亿，而到1975年达到40亿。因此，世界人口从十亿增加到40亿花了145年。
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考研英语一

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