在欢迎界面显示乐曲菜单 按1、2、3选择相应的乐曲进行演奏 按Q键退出 在乐曲演奏的过程中可以人为的进行中断，再按相应的键进行演奏乐曲或者是退出-In the welcome screen display menu, press 1,2,3 to select the appropriate music song performed by playing the music playing in the Q key to exit the process can be artific