socioecono相关论文
Health-related fitness knowledge growth in middle school years: Individual-and school-level correlat
Background: Health-related fitness knowledge (HRFK) has been an essential concept for many health and physical education......
Objective Research evidence shows a secular trend in Chinese physical growth in recent years.The aim of this study was t......
①目的探讨父母亲社会经济状况与低出生体质量儿发生的关系.②方法采用病例对照研究方法,对190名低出生体质量儿和750名正常出生体......
