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为探讨影响儿童智力的因素,我们于1990年9月对秦皇岛市7~10岁329名男、女儿童进行影响智力的多因素调查。对其中98名儿童进行头发微量元素的测定。
In order to explore the factors affecting children’s intelligence, we conducted a multi-factor investigation on intelligence affecting 329 boys and girls aged 7-10 years old in Qinhuangdao City in September 1990. 98 children were tested for hair microelements.