题目内容

You and I we have ________ before Through the magic of the moment in cyberspace Driven by a passion to ______ Playing heart to heart and face to face The challenge of a lifetime Stands before us now Beyond the game Through the portal into cyberspace We have come to decide our fate We’re _______ to celebrate Beyond the game Beyond the gameAt last the moment’s at hand All we need is to believe we can We’ll make our stand Beyond the game (Beyond the game) Beyond the game (Beyond the game) Beyond the game (Beyond the game) The World Cyber GamesThe teams are here; the spirit is right We’re connected now in a __________ way We celebrate our diversity Around the world with a passion to play The ________ will be watching The message will be heard Beyond the game Through the portal into cyberspace We have come to decide our fate We’re here to celebrate Beyond the game Beyond the game At last the moment’s at hand All we need is to believe we can We’ll make our stand

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设A是一个有界闭区间,Fn是A的(),若闭集的()是空集,则存在n也是有限的也是()

A. 闭子集
B. 交
C. 空集

任何一个交,可以变为单调()的。

A. 下降
B. 上升

任何一个交,可以变为()下降的。

设A是一个有界闭区间,Fn是A的闭子集,若闭集的交不是空集,则存在n也是有限的也是空集

A. 对
B. 错

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