试题与答案

下列各组物质中,依次是按化合物、混合物、单质组合的是( ) A.纯净的空气、铁矿

题型:选择题

题目:

下列各组物质中,依次是按化合物、混合物、单质组合的是(  )

A.纯净的空气、铁矿石、冰

B.干冰、氨气、镁带

C.冰水混合物、纯净的石油、氮气

D.氧化镁、无烟煤、医用碘酒

答案:

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