Features and main functions
1) Broadcast teaching function
2) Teacher lecture
3) Teacher ask question
4) Dialogue individually
5) Students raise hand
6) Outside media play
7) Student's demonstration
8) Grouping teaching function
9) Group meeting
10) Teacher monitor
11) Teacher explain
12) Standardization exam function
13) Listening exam
14) Random exam
15) A/B paper exam
16) Oral exam
17) Exam analysis
18) Self-study function
19) Audio order
20) Text order
21) Repeat
22) Exam by oneself
23) Consult dictionary
24)Class name edit
25) Student name edit
