设一个学生关系为S（学生号，姓名），课程关系为C（课程号，课程名），选课关系为X（学生号，课程号，成绩），若一个学生可以选修多门课程，则S和X之间是1对多的联系。
阳极反应
Your network consists of a single Active Directory domain. All network servers run Windows Server 2003 Service Pack 2 (SP2). You need to use Windows Backup to restore files to a shared folder located on a file server. The restore must maintain all the file versions saved by users since the last backup. What should you do?（） Restore the files to their original location and select the Replace existing files option.。 Restore the files to their original location and select the Replace existing files if they are older than the backup files option.。 Restore the files to an alternate location. Copy the files to the shared folder and choose to overwrite the files with duplicate file names.。 Restore the files to an alternate location. Copy the files to the shared folder and choose not to overwrite thefiles with duplicate file names.。
搜索引擎一般由以下哪四部分组成？（） 搜索器、索引器、检索器和用户接口。 搜索器、蜘蛛程序、网页数据库和用户接口。 蜘蛛程序、检索器、Web界面和用户接口。 搜索器、索引器、网页数据库和用户接口。
You are a systems administrator who has recently installed and configured FTP 7 on a computer runningWindows Server 2008. You have enabled the FTP Over SSL （FTPS） option for the server by obtaining anSSL certificate from a trusted third-party issuer. Recently， the usage of the FTP site has increased， andusers are complaining about slow download performance. You want to configure SSL settings to encryptonly credentials and commands but not file-related information. You also want to optimize encryption performance. Which of the following settings changes should you make？（） Select the Allow SSL Connections SSL Policy option.。 Disable the Use 128-bit Encryption For SSL Connections Option.。 Select the Require SSL Connections SSL Policy option.。 Select the Custom SSL Policy option.。
您有一台运行 Windows 7 的计算机。该计算机 按照下表中所示进行配置。
您打算安装一个需要 40 GB 空间的新应用程序。该应用程序将被安装到 C：\app1。您需要为该应用程序提供40 GB 的可用空间。您应该怎么做？（）
