A.COUNT(A2:K2,“√”) B.COUNT(A2,K2) C.COUNTIF(A2:K2,“√”) D.COUNTIF(“√”,A2:K2)
A.100 B.200 C.1000 D.500
A.2014-1-10 B.2014/1/10 C.1-10-2014 D.10-1-2014