mark/point/grade区别当分讲的时候,区别是?

He got a grade A in physics. Mark 分数 常用来表示不同等级的学科成绩点数、分数，每一分即一个point。 He scored 15000 points.他得了15000分

grade (n.) (数字或字母)分数
He got a grade A in math.
Steve never studies,but he always gets good grades.
mark (n.) (数字或字母)分数
The highest mark was a B+.
The passing grade for all students is 60 marks.
全校学生成绩均以60分为及格.
point (n.) (体育比赛等)得分
The judge gave him the highest point.
The grade point average of each term is calculated as follows:
学生之学期学业平均成绩计算方法如下：
Advanced Graduation:Students must have a grade point average at 75 marks or higher during the first six or seven semesters.(National Chiao Tung University Study Regulations)
提前毕业：六学期或七学期学业平均成绩之平均在75分以上.(国立交通大学学则)
score (n.) (测验)分数
The final score was 3-0.
He had an IQ score of 120.
My score on the English test was disappointing (令人失望).