2. 外语
  3. What topic is the passage mainly concerned with? How many inventions and discoveries made by man are mentioned in the passage?

What topic is the passage mainly concerned with? How many inventions and discoveries made by man are mentioned in the passage?

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问题 What topic is the passage mainly concerned with?
How many inventions and discoveries made by man are mentioned in the passage?
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答案Six
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大学英语六级

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