=95,"A",IF(C2>=90,"AB",IF(C2>=80,"B",IF(C2>=70,"C"" property="og:description"/> IF函数问题=IF(C2>=95,"A",IF(C - 知识问答 =95,"A",IF(C2>=90,"AB",IF(C2>=80,"B",IF(C2>=70,"C""/>
IF函数问题=IF(C2>=95,"A",IF(C2>=90,"AB",IF(C2>=80,"B",IF(C2>=70,