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【单选题】
合金是指由一种金属与其它金属或非金属熔合而成的具有金属特性的物质,合金由于组成和结构发生了变化,性能也有很大的变化,下列有关合金性质的描述不正确的是( )。
A.
硬度一般大于纯金属
B.
有一些元素的溶入会提高合金的耐蚀性
C.
有一些合金的熔点低于某一组元的
D.
合金的强度一般都很低
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