我国城乡居民人均纯收入
材料二:我国基尼系数的变化情况
注:基尼系数是衡量居民收入差距的一个重要指标,按照国际通行标准,基尼系数低于0.3属于均等分配区间,0.3-0.4属于合理区间,大于0.4表明收入差距拉大。国际上通常把0.4作为贫富差距的警戒线。
上述两则材料反映了什么经济现象?结合所学经济常识,说明我们应如何解决材料二所反映的问题?
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