单项选择题X 纠错

假设一个磁盘有200个磁道,编号从0~199。当前磁头正在143道上服务,并且刚刚完成了125道的请求。如果寻道请求队列的顺序是86,147,91,177,94,150,102,175,130

A.565
B.576
C.162
D.125

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