个人资料图片
English
  • 全部
  • 搜索
  • 图片
  • 视频
    • 短视频
  • 地图
  • 资讯
  • 更多
    • 购物
    • 航班
    • 旅游
  • 笔记本
报告不当内容
请选择下列任一选项。
  • 时长
    全部短(小于 5 分钟)中(5-20 分钟)长(大于 20 分钟)
  • 日期
    全部过去 24 小时过去一周过去一个月去年
  • 清晰度
    全部低于 360p360p 或更高480p 或更高720p 或更高1080p 或更高
  • 源
    全部
    Dailymotion
    Vimeo
    Metacafe
    Hulu
    VEVO
    Myspace
    MTV
    CBS
    Fox
    CNN
    MSN
  • 价格
    全部免费付费
  • 清除筛选条件
  • 安全搜索:
  • 中等
    严格中等（默认）关闭
筛选器
Paleontologist Answers Extinction Questions | Tech Support | WIRED
21:33
YouTubeWIRED
Paleontologist Answers Extinction Questions | Tech Support | WIRED
Founder and Executive director of the Edelman Fossil Park of Rowan University Paleontologist Dr. Kenneth Lacovara joins WIRED to answer the internet's questions about the phenomenon of extinction. How do we know an asteroid killed the dinosaurs? Where was the impact? Could humans go extinct in the same fashion? What are the five mass ...
已浏览 341.6万 次11 个月之前
Operant Conditioning Examples
Operant Conditioning Definition, Theory & Examples
6:30
Operant Conditioning Definition, Theory & Examples
Study.comPeter Strzyz
已浏览 15.5万 次2011年10月21日
Operant Conditioning
2:24
Operant Conditioning
weebly.com
2018年12月12日
Operant conditioning: Positive-and-negative reinforcement and punishment
7:00
Operant conditioning: Positive-and-negative reinforcement and punishment
Khan AcademyJeffrey Walsh
2013年10月17日
热门视频
Dinosaurs' Extinction: A Warning for Humanity? | Full Special
1:27:18
Dinosaurs' Extinction: A Warning for Humanity? | Full Special
YouTubeHISTORY
已浏览 160.9万 次2024年9月12日
Extinction | Official Trailer [HD] | Netflix
2:39
Extinction | Official Trailer [HD] | Netflix
YouTubeNetflix
已浏览 798万 次2018年7月11日
How The Dinosaurs Became Extinct From An Asteroid Strike | Catastrophe
48:00
How The Dinosaurs Became Extinct From An Asteroid Strike | Catastrophe
YouTubeNaked Science
已浏览 63.3万 次2024年4月12日
Operant Conditioning Experiment
Skinner Box | Experiment & Operant Conditioning
3:52
Skinner Box | Experiment & Operant Conditioning
Study.com
已浏览 9.8万 次2016年1月4日
Operant Conditioning – 4 Interesting Experiments by B.F. Skinner - CogniFit Blog: Brain Health News
Operant Conditioning – 4 Interesting Experiments by B.F. Skinner - CogniFit Blog: Brain Health News
cognifit.com
2020年9月21日
Operant Conditioning Practice Flashcards
Operant Conditioning Practice Flashcards
quizlet.com
已浏览 5 次2014年10月24日
Dinosaurs' Extinction: A Warning for Humanity? | Full Special
1:27:18
Dinosaurs' Extinction: A Warning for Humanity? | Full Special
已浏览 160.9万 次2024年9月12日
YouTubeHISTORY
Extinction | Official Trailer [HD] | Netflix
2:39
Extinction | Official Trailer [HD] | N…
电影预告片
已浏览 798万 次2018年7月11日
YouTubeNetflix
How The Dinosaurs Became Extinct From An Asteroid Strike | Catastrophe
48:00
How The Dinosaurs Became Extinct From An Asteroid Strike | Catastro…
已浏览 63.3万 次2024年4月12日
YouTubeNaked Science
Earth currently experiencing a sixth mass extinction, according to scientists | 60 Minutes
13:17
Earth currently experiencing a sixth mass extinction, according to scie…
已浏览 557.7万 次2023年1月2日
YouTube60 Minutes
How Many Times Has The Earth Experienced An Extinction Event? | The Next Great Event | Spark
47:56
How Many Times Has The Earth Experienced An Extinction Event…
已浏览 303.4万 次2022年4月13日
YouTubeSpark
The Cretaceous–Paleogene Extinction Event: As It Happened
52:28
The Cretaceous–Paleogene Extinction Event: As It Happened
已浏览 19.9万 次4 个月之前
YouTubeSpark
All 5 Mass Extinctions Explained — And How Life Survived
2:46:25
All 5 Mass Extinctions Explained — And How Life Survived
已浏览 10.6万 次5 个月之前
YouTubeThe Snoozy Scientist
1:11:54
Final Extinction | Full Movie | Action Survival Thriller
已浏览 56.5万 次2024年6月27日
YouTubeMovie Central
5:52
BBC One - Extinction: The Facts, Extinction: The Facts in 6 minutes
2020年9月14日
BBC
观看更多视频
静态缩略图占位符
更多类似内容
  • 隐私
  • 条款