而是贫民区一直是卫生环境差,平民百姓对疾病抵抗力强,抵抗力弱的无法生存。富人区卫生环境好,富人抵抗力差。以前讨论过这个问题。
而是贫民区一直是卫生环境差,平民百姓对疾病抵抗力强,抵抗力弱的无法生存。富人区卫生环境好,富人抵抗力差。以前讨论过这个问题。
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