互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒The well-known Rushmore National Monument in the United States is built on the Rush Moore Peak，1829 meters above sea level，of the Black Hills in the south-west of South Dakota. It is a group of huge stone statues of four American presidents，George Washington，Thomas Jefferson，Abraham Lincoln and Theodore Roosevelt. President Washington is the founding father of the country;the 3rd President Jefferson drafted the U. S. Declaration of Independence;the 16th President Lincoln issued the Emancipation Proclamation and the26th President Roosevelt protected the average people's right to compete fairly with trusts. All 1829 meters above sea level， made outstanding achievements for their country. They were pioneers of U. S. history.
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