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加密文件或文件夹步骤一：打开Windows资源管理器。步骤二：右键单击要加密的文件或文件夹，然后单击“属性”。步骤三：在“常规”选项卡上，单击“高级”。选中“加密内容以便保护数据”复选框

publicStringbooknameString[]={"","","","","","",""};//建立一个五个元素的数组用来存储用户所借书的条形码publicStringreturndateString[]={"","","","","","",""};//用于修改密码的显示标签和密码文本

Nslookup-------IP地址侦测器 VEMPK-HN6GJ-FP5X5-3E64P-8RV5J explorer-------我的文档 logoff---------注销命令 tsshutdn-------60秒倒计时关机命令 lusrmgr.msc----本机用户和组 services.