提供导致进程状态变化的调用接口，包括创建、删除、调度、阻塞、时间到、挂起、激 活等；实现进程列表显示的接口；这里设计的进程是一个假设的对象实体，是由程序自己创 建和删除，不是系统维护的进程。-Availability leads to the call interface of the process status changes, including create, delete, scheduling, blocking, time to suspend, activate, etc

基于Flash的课堂语音点名系统，用于课堂点名，优点是节约时间-Flash-based classroom voice roll call system, named for the classroom, the advantage of saving time