（1）当计时器运行到59分49秒开始报时，每名叫1s就停叫1s，共鸣叫6响，前5响为低音，频率为740Hz；最后一响为高音，频率为1KHz； （2）至少要有分秒显示。 -(1) when the timer operation to 59 49 seconds to strike the start point, each named 1 s stop call 1 s, resonance that six ring, before 5 ring for bass, frequency