西人的思维是询证思维，没有证据显示口罩有用前，就不用，除非媒体大量报道

来源: 通州河于 2020-01-28 00:11:15 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.