To view this page ensure that Adobe Flash Player version 10.2.0 or greater is installed.
Either scripts and active content are not permitted to run or Adobe Flash Player version 10.2.0 or greater is not installed.
姓名: 单位: 联系方式:
如果你出生在一个穷苦家庭,你比职业阶层家庭的孩子早夭的可能性要大。这是因为人们的行为方式所造成的吗?还是由于贫穷、剥夺、压力、社会环境或基因造成的呢?