IF是不是有限制可以多少个条件使用, 如果还需要增加条件设置怎么...答:"14.7",IF(B2<=12.79,"14.4",IF(B2<=12.84,"14.1",IF(B2<=12.89,"13.9",IF(B2<=12.94,"13.6",IF(B2<=12.99,"13.3",IF(B2<=13.04,"13.1",IF(B2<=13.09,"12.8",IF(B2<=13.14,"12.5",IF(B2<=13.19,"12.3",IF(B2<=13.24,"12",IF(B2<=13.29,...