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2. I couldn't have got to the meeting on time -- unless I had caught an earlier train.
我不可能及时赶到会场,除非我赶上了较找的一班火车。
3. Jim broke away from his friends, saying "I have got to hit the books."
吉姆离开他的朋友时,说道:“我得回去做功课了。”
concern
n. 关心,关系, 关切的事,忧虑
v. 涉及,与...有关,影响;使关心
1. How much money I earn is none of your concern. 我挣多少钱与你无关。
2. These problems concern all of us. 这些问题影响到我们每一个人。
3. This restaurant is a family concern. 这家饭店是由一家人经营的。
be concerned about
vt. 关心(挂念)
1. It is reassuring to be enquired after when you're ill. It shows your friends haven't stopped being concerned about you.