這要感謝伍連德醫生在1910年成功地用口罩阻止了哈尓濱鼠疫。中國人民知道了使用口罩

來源: fuz 於 2022-05-08 22:23:22 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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