美国研究机构街头随机测试新冠病毒，三分之一路人呈阳性 | 新闻早餐 2020.4.20 星期一

一日之计在于晨，新闻早餐不能少。

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美国研究机构街头随机测试新冠病毒，三分之一路人呈阳性 | 新闻早餐 2020.4.20 星期一

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