多项选择题
A.DATEDIF("2019/9/23","2020/5/23",d) B.DATEDIF("2019/9/23","2020/5/23","m") C.DATEDIF("2020/5/23","2019/9/23","y") D.DATEDIF("2019/9/23","2020/5/23","y")
A.WEEK B.DAY C.TODAY D.WEEKDAY
A.TEXT(WEEKDAY(A2),"aaaa") B.TEXT(WEEK(A2),"aaaa") C.TEXT(WEEKDAY(A2,1),"aaaa") D.TEXT(WEEKDAY(A2,1),"aaa")