A.Thisform.Lalel1B.Thisform.Text1.ValueC.Thisform.ReleaseD.Thisform.Command1.Caption
A.候選索引B.主索引、候選索引、普通索引C.主索引或候選索引D.主索引、候選索引和唯一索引
A.COPY TO JRB.COPY FILE TO JRC.COPY STRU TO JRD.COPY STRU EXTE TO JR