A.=AVERAGE(#REF!)
B.=AVERAGE(C1:F5)
C.=AVERAGE(B1:E5)
D.=AVERAGE(B1:F5)
A.=SUM(A1:A3)
B.=SUM(B1:B3)
C.=SUM(A1:B3)
D.=SUM(D1:D3)
A.10
B.20
C.30
D.空
A.=RIGHT(A1,7)
B.=MID(A1,FIND("语",A1)+1,LEN(A1))
C.=LEFT(A1,2)
D.=SUBSTITUTE(A1,"英语")
A.=DATADIF(A1,TODAY(),"y")
B.=DATADIF(A1,TODAY(),"y")"周岁"
C.=DATADIF(A1,NOW(),"y")
D.=YEAR(TODAY())-YEAR(A1)
A.10,4.5
B.10,10
C.18,4.5
D.18,10