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按照人口统计中寿命表的原理,采用金丕焕发表的。发育资料的寿命表分析方法”,我们于1980年12月份,对内蒙古巴彦淖尔盟临河地区的5,504名女学生的月经初潮年令进行了调查。各年令来潮概率总的趋势是两头低、中间
In accordance with the principle of demographic life table, the use of gold Pi glow table. Developmental Life Cycle Analysis Methodology ", we conducted a survey on the menarche of 5,504 female students in the Linhe area of Bayannur League in Inner Mongolia in December 1980. The overall trend of annual climatic probabilities in each year was two low, intermediate