多条件查找并引用
用VLOOKUP函数解决方法：
=IF(OR(A1="",B1=""),"",VLOOKUP(A1&B1,IF({1,0},Sheet1!A$1:$A$1000&Sheet1!B$1:B$1000,Shee 用INDEX和MATCH函数解决方法：
=IF(OR(A1="",B1=""),"",INDEX(Sheet1!C$1:C$1000,MATCH(A1&B1,Sheet1!A$1:A$1000&Sheet1!B$1
B$1000,Sheet1!C$1:C$1000),2,0)) 1:A$1000&Sheet1!B$1:B$1000,0)))