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【单选题】
假设高速缓存Cache工作速度为主存的5倍，且Cache被访问命中的概率为90%，则采用Cache后，能使整个存储系统获得加速比Sp为(1)。A.
3.57
B.
5
C.
4.21
D.
5.17
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【单选题】Different Stages of Sleep A scientist who has spent many years studying sleep was asked this question: 'Why do we need sleep?' His answer was.'If we do not sleep, we get very sleepy, 'No one knows exa...
A.
If we do not sleep, we get very sleepy.
B.
Because there are four different stages of sleep.
C.
No one knows the cause.
D.
It is not mentioned in the article.
【单选题】—Why do you look unhappy? —Well, my mother is on business in Beijing . I _____ her. [ ]
A.
leave
B.
think
C.
see
D.
miss
【单选题】听力原文：M: Do you have any idea where Samuel is now? It's already 10: 30. This is the third time this week he's not on time. Didn't I make it clear that all waiters and waitresses must be at work by 10, ...
A.
He thinks Samuel is late again.
B.
Samuel has been late three days in a row.
C.
Samuel has to cut lawns in the morning.
D.
Samuel doesn' t have much experience.
【简答题】Fill in the gaps with the words. hire arrive interview respect meet information natural online 1) Learn - Find out 1 about the company. Think of some questions to ask in the ...
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