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据《中华预防医学杂志》1999年9月33卷第5期报道 北京医科大学中国妇婴保健中心高万珍等,为探讨幼儿园环境是否对儿童铅暴
According to the “Chinese Journal of Preventive Medicine” in September 1999 Volume 33 No. 5 reported Beijing Medical University, China Maternal and Child Health Center Gao Wanzhen, etc., in order to explore whether the environment of kindergarten children lead violence