DavidWuu
初级会员
- 注册
- 2017-06-09
- 消息
- 647
- 荣誉分数
- 169
- 声望点数
- 53
比较可信, 很清楚
There are THREE separate types of coronavirus
Methods used to trace the prehistoric migration of ancient humans was adapted by researchers at the University of Cambridge to track the spread of SARS-CoV-2, which causes COVID-19.
www.dailymail.co.uk