题目

今年世界环境日,某校组织的保护环境为主题的演讲比赛,参加决赛的6名选手成绩(单位:分)如下:8.5,8.8,9.4,9.0,8.8,9.5,这6名选手成绩的众数和中位数分别是( ) A.8.8分,8.8分B.9.5分,8.9分 C.8.8分,8.9分D.9.5分,9.0分 答案:C. 【解析】 试题分析:由题中的数据可知,8.8出现的次数最多,所以众数为8.8; 从小到大排列:8.5,8.8,8.8,9.0,9.4,9.5,故可得中位数是(8.8+9.0)÷2=8.9. 故选C. 考点:众数;中位数. The lady insisted that the young man ____ her wallet and that he ____ to the police station at once. A. had stolen; be sent                      B. should steal; should be sent C. had stolen; sent                       D. had stolen; must be sent
数学 试题推荐