A.Select C#,AVG(Score)From学生成绩表 Group by score Order by 2,C# Desc B.Select C#,AVG(Score)From学生成绩表 Group by C# Order by 2,C# Desc C.Select C#,AVG(Score)From学生成绩表 Vyhere C# Desc Group by Score D.Select C#,AVG(Score)From学生成绩表 Group by AVG(Score)Order by 2,C# Desc