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3 . by 表示外部的,尤其是暴力的或无意中造成某种结果的原因。
a ) Her body was bent by age .
b ) The general died by his own hand .
c ) She took your umbrella by mistake .
4 . at 表示某种情绪或动作的原因,多与“喜,怒,哀,乐”等义的词连用,常译作“听到……”,“看到……”。
a ) The whole nation was in deep sorrow at the news .
b ) He jumped at the news .