题目内容

某CPU主频为200MHz，每个指令周期平均包含2.5个CPU周期（即机器周期），每个CPU周期平均包含2个时钟周期，则该机的平均指令执行速度是多少？若CPU主频保持不变，每个指令周期平均包含5个CPU周期，每个CPU周期平均包含4个时钟周期，则该机的平均指令执行速度是多少？由此可以得出什么结论？

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