【简答题】应用题; 假设CPU执行某段程序时共访问Cache命中5700次,访问主存300次,已知Cache的存取周期为20ns,主存的存取周期为120ns,求Cache的命中率以及Cache-主存系统的平均访问时间和效率,试问该系统的性能提高了多少倍?
【单选题】In the sentence “This atmosphere of excitement, arising from imaginative consideration, transforms knowledge”, the phrase “transforms knowledge” probably means ________.
A.
makes knowledge very different
B.
makes knowledge better conveyed to students
C.
makes knowledge popularized
D.
makes knowledge easily acquired