题目内容

Which of the following statements about graphene is true?

A. It is visible to the human eye.
B. It is possibly the thinnest material in the world.
C. It Can Be used to make paper.
D. Finding it Demands time and money.

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A. discoverB. repairC. fixD. maintain

A. discover
B. repair
C. fix
D. maintain

请在第_____处填上正确答案。

A. borrowed
B. delivered
C. designed
D. gathered

请根据以下内容回答{TSE}题: The Old Gate In the Middle Ages the vast majority of European

A. grounds
B. reasons
C. causes
D. purposes

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