以下是引用老鬼在2005-11-28 17:11:00的发言:
=IF(COUNTIF($A$1:A1,A1)>1,"",A1)这个公式往下拖的时候,会依次变成
=IF(COUNTIF($A$1:B1,B1)>1,"",B1)
=IF(COUNTIF($A$1:C1,C1)>1,"",C1)
=IF(COUNTIF($A$11,D1)>1,"",D1)
依此类推。
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