2. 外语
  3. How many new materials are mentioned in this passage? Why does the author mention genetic engineering and computer science?

How many new materials are mentioned in this passage? Why does the author mention genetic engineering and computer science?

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问题 How many new materials are mentioned in this passage?
Why does the author mention genetic engineering and computer science?
选项 A、To compare them with the new materials.
B、To show the significance of the new materials on the future world.
C、To compare the new materials with them.
D、To explain his point.
答案B
解析 由短文第一段最后一句可知作者提到基因工程和计算机科学就是为了表明新材料对未来世界的重要性。
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