单项选择题
A.RCONHR’B.RCOOCORC.RCOOHD.RCOCl
A.SN1B.SN2C.E1D.E2
A.乙酰胺B.乙醇C.乙酸酐D.乙烯酮
A.DMSOB.TEBAC.TBAHSD.PTC
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