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Audio-visual verification code has been issued. How long does it take to activate it?
The verification code is generally valid within 2 minutes, and it will be re-acquired after the expiration.

Audio-visual Speaking is one of the new platform college English courses, edited by Qi, published by Harbin Institute of Technology Press on February 20/KLOC-0.

This book can meet the needs of college English follow-up courses, and is also suitable for individuals to strengthen their training in sight, listening and speaking.