题干

为了解高一年级1200名学生的视力情况,采用系统抽样的方法,从中抽取容量为60的样本,则分段间隔为(   )

A:10

B:20

C:40

D:60

上一题 下一题 0.0难度 选择题 更新时间:2015-06-26 06:33:00

答案(点此获取答案解析)

B

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