下列知识结构中，正确的是：（　　）

一次考试某简答题满分5分，以0.5分为给分区间．这次考试有100人 参加，该题没有得零分的人，所有人的得分按(0,1,(1,2,...(4,5分组所得的频率分布直方图如图所示．设其众数、中位数、平均分最大的可能值分别为m₀,m_c,$\stackrel{-}{x}$，则(  )

A

    Hi! I'm Alan Miller．I'm an English boy．I'm 12．I'm in Grade Seven．My parents work in Tianjin now．My father is a teacher and my mother is a doctor．I have a brother, John．We are students in a middle school in Tianjin．He is 14 and he is in Grade Nine．We are in the same (相同的) bedroom．He puts his things in their right places，but my things are everywhere．

    Hello! My name is Zhou Wen．I am a Chinese girl．I'm 13．I'm a student of Grade Seven．Now I live in Beijing with my parents．My father is a doctor．My mother is a teacher．She teaches English in a school．My sister Zhou Xue is 3．She is with my grandparents．They are in Tianjin．My grandparents look after my sister．

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