下列表述不正确的是 A.人造刚玉熔点很高,可用作高级耐火材料,

下列表述不正确的是

A.人造刚玉熔点很高,可用作高级耐火材料,主要成分是Al2O3

B.清洁能源所用光电池的生产材料主要是用高纯度的硅

C.在医疗上碳酸氢钠可用于治疗胃酸过多

D.氮的固定只有在高温、高压、催化剂的条件下才能实现

答案

D


解析:

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