页面更新时间：2022-04-21 22:32网址介绍
可汗学院公开课,Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.
提示：此页是<可汗学院公开课>的介绍页面，并非官方站点，我们收集于网络只为广大网民快速查询提供便利帮助。