The video owner has disabled playback on external websites.
This video is no longer available on YouTube.
This video cannot be played right now.
Watch on YouTube
B1 中级
英语
16:31
Educational
Introduction to the immune system
学习统计
B1
CEFR 等级
5/10
难度
评论 (0)
登录后评论
还没有评论。成为第一个分享想法的人！
互动模式
测验
正确！
不太对。
正确答案：
相关视频
Waymo Keynote at Web Summit 2017
B1
22:29
Trump Loses Battle to Conceal Epstein Files; Greene Hits Back Over “Traitor" Nickname: A Closer Look
B1
10:51
Killing Eve Season 1 (Cinematic Trailer)
B1
2:30
Trump Tells UN General Assembly Their Countries 'Are Going To Hell' | The View
B1
5:20
Chinese mega-embassy in London approved by UK government | BBC News
B1
3:45
Osmosis from Elsevier
测验
正确！
不太对。
正确答案：
观看视频时会出现测验
记忆技巧
来自此视频
免费开始学语言
