Many pure metals have little use because they are
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Many pure metals have little use because they are too soft,rust too easily,or have some other drawback.
A:property B:additive C:disadvantage D:disparity
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答案：C
本句意思：很多纯金属用处很小，因为它们要么太软，太容易生锈，要么有某种其他缺点。drawback缺点。disadvantage缺点；property属性，性质；additive添加剂；disparity不同，不 等，不一致。