在可变分区存储管理中,系统收回已完成作业的主存空间,并与相邻空间合并,可造成空闲区数减1的情况是()
A.有上邻空闲区、也有下邻空闲区
B.无上邻空闲区、也无下邻空闲区
C.有上邻空闲区、但无下邻空闲区
D.无上邻空闲区、但有下邻空闲区
正确答案是A
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