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![](https://img.kancloud.cn/7a/23/7a2385d84b063b99771ffedeaec56af1_728x439.png) ###  B1单元格公式为:=IF(ISNA(VLOOKUP(A1,$C$1:$C$6,1,)),"←A有C无","←AC共有") ### D1单元格公式为:=IF(ISNA(VLOOKUP(C1,$A$1:$A$6,1,)),"←C有A无","←CA共有")