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
葡萄牙语
8:17
Educational
Wave Characteristics - Period, Frequency, Wavelength and Propagation Speed
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
Visit Cabo Verde Ilha Brava
B1
2:04
Criei um Mini Lago na Minha Mesa
B1
8:09
How to create desire for your products and make your customer buy without asking the price
B1
10:53
Hamnet - A Vida Antes de Hamlet | Trailer 1 Oficial Legendado
B1
2:25
CANTIGAS DE RODA - Bia&Nino [vídeo para criança]
B1
25:21
Maurício Física
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
