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A.(CH3)2O B.HCHO C.CH3CHO
A.(CH3)2O B.CH3CHO
C.HCHO D.C2H2和H2O
人造象牙的主要成分的结构是,它是通过加聚反应制得的,则合成人造象牙的单体是( )
A.(CH3)2O B.CH3CHO
C.HCHO D.C2H2和H2O
A.(CH3)2O B.CH3CHO C.HCHO D.C2H2和H2O