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 以下物質的用途不合理的是

  A.晶體硅：半導體材料    B.尿素： 食品發(fā)酵劑

C.二氧化硅：光導纖維     D.液氮：冷凍物質                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

 

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科目：高中化學 來源：2010年上海市寶山、靜安、楊浦、青浦四區(qū)高考模擬考試 題型：單選題

 以下物質的用途不合理的是

  A.晶體硅：半導體材料     B.尿素： 食品發(fā)酵劑

C.二氧化硅：光導纖維      D.液氮：冷凍物質                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                

 

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