How many new materials are mentioned in this passage? Where lies success of a country in the New Age of Superstuff?

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问题 How many new materials are mentioned in this passage?
Where lies success of a country in the New Age of Superstuff?

选项 A、It lies in research.
B、It lies in investment.
C、It lies in innovation.
D、It lies in application.

答案D

解析

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公共英语五级笔试

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