Which three statements are true about database recovery operations？（） Damaged or lost data files are restored from backups.。 Redo log file entries are used to roll forward the database.。 Undo segments are used to roll back any uncommitted transactions.。 Transactions that were active when the failure occurred are restarted.。 Transactions that were active when the failure occurred are automatically committed during the recover procedure.。
使用（）对象可以实现数据库的相关表功能。
第一台望远镜的发明者是（）。 伽利略。 牛顿。 哥白尼。 李•波尔赛。
The client computers in your network run either Windows XP or Windows 7. All client computers are in a single Active Directory Domain Services （AD DS） organizational unit （OU） named MyClients. You install Windows Software Update Services （WSUS）. You create a Group Policy object （GPO） that enables automatic updates from the WSUS server， and you link the GPO to the MyClients OU. You place all client computers in a targeting group named MyClients. Testing reveals that a security update that is applicable to both Windows XP and Windows 7 causes a line-of-business application to fail on the Windows XP client computers. You need to ensure that the application runs on the Windows XP client computers and that the Windows 7 client computers receive the security update. What should you do？ （） Remove the Windows 7 client computers from the MyClients targeting group. Approve the update for installation to the All Computers targeting group.。 Remove the Windows XP client computers from the MyClients targeting group. Approve the update for installation to the All Computers targeting group.。 Remove the Windows 7 client computers from the MyClients targeting group. Approve the update for installation to the Unassigned Computers targeting group.。 Create a targeting group named MyXPClients beneath the MyClients targeting group. Move the Windows XP client computers to the MyXpClients targeting group. Approve the update for installation to the MyClients targeting group.。
下列关于公安机关办理治安案件期限的表述，正确的是（）。 为了查明案情进行鉴定的期间，不计入办理治安案件的期限。 派出所需要延长治安案件办案期限的，应当由所属县级公安机关报地级市公安机关批准。 对已超过办案期限的治安案件，不得对违反治安管理行为人决定治安管理处罚。 调解达成协议后不履行的治安案件的办案期限，自不履行之日起开始计算。
用秤称日光的重量，这一细节出自小说（）。
