C1输入公式=IF(COUNTIF(B:B,A1)=0,A1,"")公式下拉复制
C1输入公式 =IF(INDEX($A$1:$A$10,SMALL(IF(COUNTIF($B$1:$B$10,$A$1:$A$10),"",ROW($A$1:$A$10)),ROW(A1)),1),INDEX($A$1:$A$10,SMALL(IF(COUNTIF($B$1:$B$10,$A$1:$A$10),"",ROW($A$1:$A$10)),ROW(A1)),1),"")向下填充,