计算机采用分级存储体系的主要目的是为了（ ）。
- A.解决主存容量不足的问题
- B.提高存储器读写可靠性
- C.提高外设访问效率
- D.解决存储的容量、价格和速度之间的矛盾
正确答案及解析
正确答案
解析
本题考查计算机系统基础知识。
存储体系结构包括不同层次上的存储器，通过适当的硬件、软件有机地组合在一起形成计算机的存储体系结构。例如，由高速缓存（Cache）主存储器（MM）和辅助存储器构成的3层存储器层次结构如下图所示。
接近CPU的存储器容量更小、速度更快、成本更高；辅存容量大、速度慢，价格低。采用分级存储体系的目的是解决存储的容量、价格和速度之间的矛盾。
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