給你一個文章看看,相信科學,不相信鬼神

來源: 2020-12-04 15:22:49 [舊帖] [給我悄悄話] 本文已被閱讀:

https://www.kqed.org/mindshift/56842/what-the-research-says-about-school-reopening-and-covid-19-transmission