题目

任务型阅读。 One of the most important festivals in China is Mid­Autumn Festival.It is on the 15th day of the eighth lunar month.In China，the full moon means reunion (团圆)．On that day，people will get together and look at the full moon.People sit at the table and eat mooncakes.Some people can't go home because of the distance.The family often sends mooncakes to them. 1．The underlined word “distance” means ______ in Chinese. 2．What does the full moon mean for Chinese? ________________________________________________________________________. 3．When is Mid­Autumn 某班级有50名学生，其中有30名男生和20名女生，随机询问了该班五名男生和五名女生在某次数学测验中的成绩，五名男生的成绩分别为86,94,88,92,90，五名女生的成绩分别为88,93,93,88,93.下列说法一定正确的是(  )A．这种抽样方法是一种分层抽样 B．这种抽样方法是一种系统抽样 C．这五名男生成绩的方差大于这五名女生成绩的方差 D．该班男生成绩的平均数小于该班女生成绩的平均数