61教学网

CAD自学网是一个永久免费的设计软件自学网，提供AutoCAD、Catia、UG、Pro/E、Creo、Solidworks、CAXA、PS、Revit、3dmax、sketchup，天正CAD等设计软件与教程的下载，致力于为设计师提供便捷的软件、教程和图纸下载。

XuetangX is a MOOC platform launched by Tsinghua University in October 2013. It is a research exchange and achievement application platform of the Online Education Research Center of the Ministry of Education. It is the country's first batch of double-creation demonstration base projects in 2016. The deputy secretary-general unit of the Educational Integration Research Branch is also an online education platform for the UNESCO International Engineering Education Center (ICEE). At present, the school runs more than 2,300 quality courses from Tsinghua University, Peking University, Fudan University, University of Science and Technology of China, as well as first-class universities at home and abroad, including MIT, Stanford University, University of California, Berkeley, covering 13 university subjects .