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
12:33
Educational
Genes, DNA & chromosomes | Heredity & Evolution | Biology | Khan Academy
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
G20 Summit 2025 | South Africa Says President Will Not Hand G20 To US Embassy Official
B1
0:57
YES, it's possible - Daily Routine at C1 (Advanced) Level of English!
B1
14:19
Romeo + Juliet (1996) - 1,000 Times Goodnight Scene (3/5) | Movieclips
B1
2:43
The Next Big Earthquake Could Sink Parts of the Pacific Northwest | NOVA | PBS
B1
5:17
Protective Mom - SNL
B1
4:35
Khan Academy India - English
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
