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作者对昆明市6～15岁儿童及青少年共213人进行了智商测定及头发中铁、铜、钻、镣、铅、镉、镍、钙、锌、钾、钠、钙、镁、磷等元素含量进行测定，并分析青少年智力发育水平与头发中元素含量之间的关系。1研究对象和测定方法1．1研究对象：昆明市四所普通小学，一所普通中学，两
The authors measured the IQ of 213 children and adolescents aged 6-15 in Kunming, and analyzed the contents of iron, copper, diamond, gallium, lead, cadmium, nickel, calcium, zinc, potassium, sodium, calcium, magnesium and phosphorus in the hair , And analyzed the relationship between adolescent mental development and the content of elements in the hair. A study of objects and determination of 1.1 research object: Kunming, four ordinary primary schools, a general secondary school, two