发布日期:2010-06-16 09:46:17
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氮化硅(Si3N4)是一种新型陶瓷材料的主要成分,能承受高温,可用于制造业、航天工业等。氮化硅属于 A. 金属单质 B. 非金属单质 C. 化合物 D. 混合物 |