采用先来先服务、最短寻道优先以及电梯调度方法，对于如下给定的一组磁盘访问进行调度。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。(当前读写头在90号，向磁道号增加的方向移动)-Shortest seek first-come, first serve, priority and elevator scheduling method for following a given set of disk access scheduling. Required to give the order of disk access for each algorithm to calculate the average number of mobile Road. (Read-write head 90, the move to the direction of increase in track number)