问题
单项选择题
On a __( )__ memory system，the logical memory space available to the program is totally independent of the physical memory space.
A．cache
B．virtual
C．RAM
D．ROM
答案
参考答案：B
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On a __( )__ memory system，the logical memory space available to the program is totally independent of the physical memory space.
A．cache
B．virtual
C．RAM
D．ROM
参考答案：B
