对于如下给定的一组磁盘访问进行调度,要求分别采用先来先服务、最短寻道优先以及电梯调度方法进行调度,要求给出每种算法中磁盘访问的顺序，计算出平均移动道数,假定当前读写头在90号，向磁道号增加的方向移动-For the following given to a group of disk access scheduling, the requirements were used to first-come, first serve, shortest seek priority scheduling