对在校某班学生一门课程的平时成绩与考试成绩进行统一管理。每个学生记录包括学号、姓名、考试成绩和总评成绩等信息，以学号为序存放。-Certain classes of students in the school a course of ordinary achievements and examination results for unified management. Each student records including student number, name, test scor