题目

. I’ve never read a better book than this one._____,it is the best one that I have ever read. A.Since then      B.In other words  C.At times       D.In some ways 答案:BFe(CO)5常温下呈液态,熔点为-20.5℃,沸点为103℃,易溶于非极性溶剂,据此可判断Fe(CO)5晶体类型是(  ) A、金属晶体B、离子晶体C、分子晶体D、原子晶体
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