题目

It began as a game: high school and college students studying computer technology figured out they could use personal computers to break into telephone company computers and make free, long-distance telephone calls. These young computer wizards (奇才) soon gained the nickname hackers (黑客). Police put the collar on a few hackers, but many went on to even more complex hacking. One hacker was arrested for making illegal telephone calls and later used a jailhouse phone to alter a police officer's credit records to get back at the officer for arresting him. The hacker also used a computer to肃清队伍。(划去不同类的一个词语)1.矫健　轻快　敏捷　玲珑2.散射　折射　反射　照射3.聪明　机灵　狡猾　伶俐