说明：  包括三个小程序：1三种音响的模拟，警笛声、消防车声、烟花燃放声2演奏乐曲“两只老虎”3进行简单听力测试
(Including three small programs: one in three stereo analog, siren sound, fire engine sound, the sound of fireworks going off 2 play music, )