1.To keep computer files secure,many programs require the us

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1.To keep computer files secure,many programs require the user to enter a password.The shortest allowable passwords are typically six characters long and can contain both numbers and letters .How many six-character passwords are possible if (a)characters can be repeated and (b) characters cannot be repeated?

就是密码最少是6位数的数字或者字母组成,1,当数字或者字母可以重复的时候,密码能有多少个?2.当不可以重复使用的时候能有多少个

1.To keep computer files secure,many programs require the us 同义句改写 I use the computer to write computer programs [W44] The computer programs are a puzzle to me.The more I th The computer programs are a puzzle to me．The more I think of The computer programs are a puzzle to me.The more I think of The files were accessed every day to keep them up to date.中文英语翻译In addition,the computer programs a company uses to esti 英语翻译Many embedded system that do not require computer commun 1.miss chen tells us( to keep/keep)the environment clean. 1.Many games are o____ on the computer .Many people like to 英语翻译1- Go to Origin Games folder( Under Programs Files on yo 高二英语单选题1.They use computer to keep the traffic ( )smoothly.A