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15. root 1) n. a) the part of a plant that grows down into the soil in search of food and water; b) the part of a tooth, hair, or organ that holds it to the rest of the body; c) the central part or cause of sth; d) one’s roots: the place where one grew up. 2) v. to make or get roots
These plants have very deep roots.
This is the root cause of poverty.
Some people believe that money is the root of all evil. Where is your roots? Do roses root easily?
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