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【单选题】
操作系统在控制和管理进程的过程中，涉及到______这一重要数据结构，这是进程存在的唯一标志。A.
FCB
B.
FIFO
C.
FDT
D.
PCB
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A.
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【简答题】Life’s a long, long journey(旅程)” so we are told, and most of us would not set off on a journey, even a short one, without some idea of where we wanted to go. Yet many people travel on life’s journey w...
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