算法的基本特征是可行性、确定性、【1】和拥有足够的情报。

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问题填空题

答案

参考答案：有穷性

解析：[知识点] 算法的基本概念；算法复杂度的概念和意义(时间复杂度与空间复杂度)
[评析] 算法是指解题方案的准确而完整的描述。它有4个基本特征，分别是可行性、确定性、有穷性和拥有足够的情报。

阅读理解

People need to relax and enjoy themse1ves．One way they can have a good time is to watch a baseball game or another sports event．Even thousands of years ago，groups of people gathered（聚集） to watch skilled athletes（运动员）．

　　Over 2000 years ago in Greece，certain days in the year were festival days．These were holidays when people stopped work and enjoyed themselves．They liked to watch athletes take part in races and other games of skill．

　　The most important festival was held every four years at the town of Olympia．It was held in honor of the Greek god Zeus（Zus）．For five days，athletes from all parts of the Greek world took part in the Olympic Games．At the Olympic Games，people could watch them box，run，jump and so on．There was a relay race between two teams of men in which a lighted torch（火矩）was passed from runner to runner．The Olympic Games were thought to be so important that cities which were at war with one another had to stop fighting．People were allowed to travel to the games safely．Thousands of people came to Olympia from cities in Greece and from her colonies（殖民地）in Africa，Asia and Italy．They met as friends to cheer their favorite athletes and to enjoy themselves．