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8.role n. a part in a play or film
Charles Liang played the role of Harmlet in our school play.
a leading role; the main role
n. play an important role in 起重要作用
The USA plays an important role in international relations.
9.Some place be crowded with 挤满了……
crowd v. 涌入
When the opera ended, all the audience crowded into the street immediately.
crowd n. 人群 the crowd
a crowd waiting for the show
10.obey v.---do what someone ordered; follow instructions 服从，遵守
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