第33题: [多项选择] {$mediaurl}What are the students mainly discussing Click on two answers. A. How music differs from noise B. Sounds made by musical instruments C. The phenomenon of antinoise D. Why some sounds are unpleasant 参考答案:A,C 答案解析:[解析] 18-22 W: Welt, I don’t know about you, but I’m totally confused about today’s lecture, espe