123456789101112统计 B2:B30 中大于等于 60 的个数，应使用______。ASUM(B2:B30>=60)BCOUNTIF(B2:B30,">=60")CCOUNT(B2:B30)DAVERAGEIF(B2:B30,">=60")上一题按 A–D 选择，Enter 下一题，左右方向键翻题