回答如下：可以通过以下公式来判断车牌号所属的省份：
=IF(LEFT(A1,1)="京","北京",IF(LEFT(A1,1)="津","天津",IF(LEFT(A1,1)="沪","上海",IF(LEFT(A1,1)="渝","重庆",IF(LEFT(A1,1)="冀","河北",IF(LEFT(A1,1)="豫","河南",IF(LEFT(A1,1)="云","云南",IF(LEFT(A1,1)="辽","辽宁",IF(LEFT(A1,1)="黑","黑龙江",IF(LEFT(A1,1)="湘","湖南",IF(LEFT(A1,1)="皖","安徽",IF(LEFT(A1,1)="鲁","山东",IF(LEFT(A1,1)="新","新疆",IF(LEFT(A1,1)="苏","江苏",IF(LEFT(A1,1)="浙","浙江",IF(LEFT(A1,1)="赣","江西",IF(LEFT(A1,1)="鄂","湖北",IF(LEFT(A1,1)="桂","广西",IF(LEFT(A1,1)="甘","甘肃",IF(LEFT(A1,1)="晋","山西",IF(LEFT(A1,1)="蒙","内蒙古",IF(LEFT(A1,1)="陕","陕西",IF(LEFT(A1,1)="吉","吉林",IF(LEFT(A1,1)="闽","福建",IF(LEFT(A1,1)="贵","贵州",IF(LEFT(A1,1)="粤","广东",IF(LEFT(A1,1)="青","青海",IF(LEFT(A1,1)="藏","**","其他"))))))))))))))))))))))
其中，A1是车牌号码单元格的地址，公式中判断了各个省份的省会或缩写，如果匹配成功，则返回对应的省份名称，否则返回“其他”。
