题目

 It has been made __________ public that anyone who does harm to the environment in         __________ public places will be blamed by __________ public. A. the, the, the               B. /;the; the         C. /; /; the                D. the; /; the 答案：C某同学抽取一个学习小组统计这些同学本学期的用笔情况，结果如下表：用笔数（支）45689学生数44732则关于这20名学生本学期的用笔数量，下列说法错误的是( ) ．A. 中位数是6支 B. 平均数是6支 C. 众数是6支 D. 方差是5