A.羟基B.碳碳叁键C.sp2碳-氢(C-H)D.羰基
A.3200-3600cm-1B.1600-1800cm-1C.2200-2300cm-1D.3100-3000cm-1
A.2200-2300cm-1B.3100-3000cm-1C.3200-3600cm-1D.1600-1800cm-1