問題是如果可以從空氣傳染那戴一般外科口罩也沒用了

来源: violinpiano 于 2020-11-24 20:27:36 [旧帖] [给我悄悄话] 本文已被阅读：次

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問題是如果可以從空氣傳染 那戴一般外科口罩也沒用了