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jia you xiao bao bao , an quan da fang wei
Author(s): 
Pages: 43
Year: Issue:  5
Journal: Family & Child Care

Abstract: 有关安全的几组数据  美国:美国儿童事故防治中心的统计数据显示,每年有近1亿的儿童在家庭事故中受害,其中一半以上是4岁以下的幼儿.……
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