第一个记录包含形成期末成绩的不同类型的任务的数量，n，举例来说，小测验、测试、考试，等等。
The first record contains the number, n, of distinct type of assignments that contribute to the final grade; for example, quizzes, tests, exams, and so on.
第一个记录包含形成期末成绩的不同类型的任务的数量，n，举例来说，小测验、测试、考试，等等。
The first record contains the number, n, of distinct type of assignments that contribute to the final grade; for example, quizzes, tests, exams, and so on.
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