在sheet2的 C1中输入=IF(sheet2!A1=sheet1!A1,sheet1!B1,"")
=IF(Sheet8!A1=Sheet9!A1,Sheet9!B1=Sheet9!B1)即可
用lookup函数 lookup(sheet1 ……sheet2,,)具体方法也说不清,你去百度一下lookup函数用法比我说的清楚