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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本试题收录于：公共英语五级笔试题库公共英语（PETS）分类

公共英语五级笔试

公共英语（PETS）

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

公共英语五级笔试

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