通过波形处理，可以将两个音色不同的歌手变成同一音色。
参考答案：对
All the people _____ at the party were his supporters. [ ]
A. present
B. thankful
C. interested
D. important
下列金属中抵抗腐蚀能力最强的是：（）.
A、银
B、镁
C、铁
D、铝
