问题
选择题
—What ____ does she like?
—Baseball. She ____ every day. [ ]
A. exercise; exercise
B. exercise; exercises
C. exercises; exercise
D.exercises; exercises
答案
答案：B
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—What ____ does she like?
—Baseball. She ____ every day. [ ]
A. exercise; exercise
B. exercise; exercises
C. exercises; exercise
D.exercises; exercises
答案：B
设有三个处理机A，B和C。它们各有一个高速缓冲存储器CA，CB和CC，并各有一个主存储器MA，MB和MC，其性能如表2-5所示。
表2-5 性能表
| CA | CB | CC | MA | MB | MC | |
| 存储容量 | 8KB | 8KB | 8KB | 2KB | 2KB | 2KB |
| 存取周期 | 60ns | 80ns | 100ns | 1μs | 0.9μs | 0.8μs |
A．0.6
B．0.7
C．0.8
D．0.9