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是OSI参考模型的最高层，直接面向用户。

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Sport has the power to change the world. It has the power to 1)__. It has the power to 2) people in a way that little else does. Sport can 3)_ hope where there was previously only 4)_. Sport speaks to people in a 5)_ they can understand. Sport is not just about the players, the 6)____ and the spectacle — it also plays an important role at the individual level.

Answer the questions and discuss them with your partner.What kind of sport do you like most? What do you think is most important for success in sports? Discuss and share your opinions on these questions with your partner.

Please match each word below with its meanings.

计算机网络拓扑是指（）部分的拓扑构型。

A. 通信子网
B. 资源子网
C. IP网络
D. 覆盖网络