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【简答题】
某计算机系统的内存储器由 cache 和主存构成, cache 的存取周期为 45ns,主存的存取周期为200ns。已知在一段给定的时间内,CPU共访问内存4500次,其中340次访问主存。问: (1) cache 的命中率是多少? (2) CPU访问内存的平均时间是多少? (3) Cache- 主存系统的效率是多少?
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反馈参考答案：
举一反三
【简答题】按照孔径结构大小,多孔碳材料可以分为哪三种类型,并列出其对应孔径大小?
【单选题】The rate of pressure rise during the period following fuel ignition in a diesel will result in ___________.
A.
valve overlap
B.
volumetric efficiency
C.
turbulence of the air change
D.
fuel efficiency
【简答题】财务指标分析就是指财务比率分析。( )
【简答题】While the rate of agency recruitment fluctuated over the four-year period, there was a steady rise in recruitment through newspapers over the same period.
【单选题】When the compounding period is given without the interest rate identified as either nominal or effective, it is assumed to be a (an) ______________.
A.
Payment period
B.
Single payment
C.
Effective interest rate
D.
Nominal rate
【单选题】When no compounding period is stated with an interest rate, the interest is assumed to be compounded over the ____________.
A.
Payment period
B.
Single payment
C.
Interest period
D.
Effective interest rate
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