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
6:46
Educational
Adam Smith's Invisible Hand Theory Explained | Economics
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
Crohn's disease (Crohn disease) - causes, symptoms & pathology
B1
6:38
All The Best Moments From Season 18 - The Graham Norton Show
B1
17:51
Riemann Hypothesis - Numberphile
B1
17:03
Actor Awards: Harrison Ford Tears Up During Lifetime Achievement Award
B1
2:36
Gareth's Stapler | The Office | BBC
B1
2:37
Federal Reserve Bank of St. Louis
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
