在构成人体的化学元素中,质量分数占绝大多数的元素有 A.C、H、Ca

在构成人体的化学元素中,质量分数占绝大多数的元素有

A.CHCaMgB                     B.NPSZnCuMn

C.CHOPSN                    D.HOFeBZnMg

答案

C

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