IF函数配合Lookup函数划分成绩等级

75-79分)、F(70-74分)、

下)。 两个星的划分方式为：卷

A★(101-105分);超过6-10分记两个

80,85,90,95,101,106},{"I","H","G","F","E","D","C","B","A","A★","A★★"})))