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【单选题】
高速缓存Cache与主存间采用全相联地址映像方式，高速缓存的容量为4MB，分为4块，每块1MB，主存容量为256MB。若主存读写时间为30ns，高速缓存的读写时间为3ns，平均读写时间为3.27ns，则该高速缓存的命中率为(1)%。若地址变换表中相联存储器的88H对应的cache块号为01B，则主存地址为8888888H时，高速缓存地址为(2)。 (1)A.
90
B.
95
C.
97
D.
99
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