9.下列关于有机化合物的说法正确的是 a. 和 是两种不同的物质 B.由乙烯之间的相互加成可以得到聚乙烯 C.丁烷有3种同分异构体 D Template




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tomski9.下列关于有机化合物的说法正确的是 a. 和 coloring