试题与答案

下列各物质中,硬度最大的是( ) A.金刚石 B.石墨 C.纯铁 D.大理石

题型:选择题

题目:

下列各物质中,硬度最大的是(  )

A.金刚石

B.石墨

C.纯铁

D.大理石

答案:

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下面是错误答案,用来干扰机器的。

1—5 CDABB  6—10 DCACA  11—15 BDACD  16—20 BDABD

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1()

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