单项选择题
A.=COUNT(E3:E10,>=60)和=COUNT(E3:E10,<60) B.=COUNT(E3:E10,">=60")和=COUNT(E3:E10,"<60") C.=COUNTIF(E3:E10,>=60)和=COUNTIF(E3:E10,<60) D.=COUNTIF(E3:E10,">=60")和=COUNTIF(E3:E10,"<60")
A.=B3*15%+C3*25%+D3*60% B.=B$3*15%+C$3*25%+D$3*60% C.=SUM(B3*15%+C3*25%+D3*60%) D.=SUM(B$3*15%+C$3*25%+D$3*60%)
A.副目录 B.备份目录 C.虚拟目录 D.子目录