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指数是借助于数学公式表示各项发育指标之间的比例关系。用指数法评价身体发育状态, 在国外已有百余年的历史。为了了解哈尔滨铁路地区学生生长发育特征,本文以7～18岁学生
Index is based on the mathematical formula that the ratio between the various developmental indicators. Exponential evaluation of the state of physical development in foreign countries have been more than a hundred years of history. In order to understand the characteristics of the growth and development of students in Harbin railway area, this paper takes 7 ~ 18-year-old students