COUNTBLANK 函数得出某个集合内空白单元格的个数。 COUNTBLANK(范围) 范围： 集合，包含对单个单元格范围的引用。
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numbers函数-AVERAGE
numbers函数-AVERAGEA
numbers函数-AVERAGEIF
numbers函数-FREQUENCY
numbers函数-LOOKUP
numbers函数-SUMSQ
numbers函数-COUNTBLANK
numbers函数-COUNT
numbers函数-COUNTA
numbers函数-COUNTIF
numbers函数-sum 求和
numbers函数-SUMIF 条件函数