说明：  这个程序不需要测试程序，因为中断是个异步的外部事件，要求每到发生的时候，系 统都需要响应，因此不需要测试程序，系统也会自动响应中断的
(This procedure does not require testing procedures, because of the interruption is an asynchronous external events, to occur every time, the system needs to respond, so do not need to test procedures, the system will automatically respond to disruption)