题目

—Alice, our class lost the game yesterday.—I know they practiced a lot. A . That's for sure. B . Why not? C . I see. D . How come? 答案：D对某班组织的一次考试成绩进行统计，已知80.5～90.5分这一组的频数是8，频率是0.2，那么该班级的人数是  人．