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为掌握我校学生的生长发育状况及其规律，为今后的教学、体育和卫生保健工作提供科学的依据，我们从1981年以来的两次体检资料中选取有代表性的身高、体重、胸围三项形态指标进行了动态分析。1调查对象与方法：1．1对象随机抽取我校初、高中12～17周岁的城镇学生。1981年998人
To grasp the growth and development of our students and their laws and provide a scientific basis for future teaching, sports and health care work, we selected from two physical examination data since 1981 representative height, weight, bust three Item morphological indicators were analyzed dynamically. A survey of objects and methods: 1.1 object randomly selected my school early, high school 12 to 17-year-old urban students. In 1981 998 people