问题

下列物质中不属于合金的是()。

A

玻璃钢

B

黄铜

C

生铁

D

硬铝

答案解析

本题考查结构组成。

A选项,玻璃钢是玻璃纤维与合成材料复合而成的一种特殊材料,属于复合材料。

B选项,黄铜属于铜的合金。

C选项,生铁属于铁的合金。

D选项,硬铝是铝的合金。

故正确答案为A项。

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