题目

阅读理解Astudy of 3, 884students from primary schools to colleges found that examinations made 83. 1 percentof primary students anxious, and more than 40 percent of high schoolchildren were out of sorts (身体不适) because of stress and anxiety. Moreover,75 percent of the high school respondents admitted that they had problems talkingto their parents and more than 55 percent of them found it hard to associate withother people, according to the study. Itis not difficult to conclude that our children are not happy. Today's kids are coming homefrom school weighed down with backpacks full o某学校8个班级进行足球友谊赛，比赛采用单循环赛制（参加比赛的队，每两队之间进行一场比赛），胜一场得3分，平一场得1分，负一场得0分，某班共得15分，并以不败成绩获得冠军，那么该班共胜场比赛．