What do we learn about Smog Free Tower?
A、It has been widely used in hospitals.
B、It can be very profitable in the future.
C、It can make surrounding areas completely clean.
D、It has been under development for three years.
大学英语听说教程3

章节列表

Unit 1 ALL roads lead to Rome Listen to share1Unit 1 ALL roads lead to Rome Further listening3Unit 2 Challenge yourself Listen to understand2Unit 2 Challenge yourself Listen to communicate4Unit 2 Challenge yourself Listen to share4Unit 2 Challenge yourself Further listening2Unit 3 A worderful life Listen to understand2Unit 3 A worderful life Listen to communicate8Unit 3 A worderful life Listen to share7Unit 3 A worderful life Further listening2Unit 4 Here and there Listen to understand2Unit 4 Here and there Listen to communicate4Unit 4 Here and there Listen to share3Unit 4 Here and there Further listening3Unit 5 Workplace wisdom Listen to understand2Unit 5 Workplace wisdom Listen to communicate4Unit 5 Workplace wisdom Listen to share4Unit 5 Workplace wisdom Further listening3Unit 6 Listen to understand2Unit 6 Listen to communicate5Unit 6 Listen to share1Unit 6 View the world1Unit 6 Further listening1CET4 Listening practice CET4 Listening practice（一）10CET4 Listening practice CET4 Listening practice（二）10CET4 Listening practice CET4 Listening practice（三）10