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
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