【判断题】
A、=SUM(A2:A5) B、=SUMIF(A2:A5,800,B2:B5) C、=COUNTIF(A2:A5,800) D、=SUM(B2:B5,800,A2:A5)
A、=IF(A5<60,不及格,及格) B、=IF(A5<60,"不及格","及格") C、=IF(A5<60,及格,不及格) D、=IF(A5<60,"及格","不及格")