[多选] 欲把背景层转换为普通的图象图层，以下哪种做法是可行的？（）

You are the network administrator for your company. The network consists of a single Active Directory domain. The network contains Windows Server 2003 file servers. The network also contains a Windows Server 2003 computer named Server1 that runs Routing and Remote Access and Internet Authentication Service （IAS）. Server1 provides VPN access to the network for users’ home computers.   You suspect that an external unauthorized user is attempting to access the network through Server1. You want to log the details of access attempts by VPN users when they attempt to access the network. You want to compare the IP addresses of users’ home computers with the IP addresses used in the access attempts to verify that the users are authorized.  You need to configure Server1 to log the details of access attempts by VPN users.   What should you do？  （）  Configure the system event log to Do not overwrite.。  In IAS， in Remote Access Logging， enable the Authentication requests setting.。  Configure the Remote Access server to Log all events.。  Create a custom remote access policy and configure it for Authentication-Type.。 一氧化碳气体检测报警仪的检测与报警响应时间应在（）s以内。 120。 60。 20。 You have a Windows Server 2008 R2 Hyper-V failover cluster. You manage the cluster by using Microsoft System Center Virtual Machine Manager （VMM） 2008 R2.   You plan to monitor the environment by using Microsoft System Center Operations Manager 2007. You need to identify when Hyper-V server load exceeds specific CPU and memory thresholds， and you must rebalance the environment accordingly.  What should you do？（） Configure the Placement settings to maximize resources for each of the Hyper-V servers。 Configure Performance and Resource Optimization （PRO） to automatically implement PRO tips。 Configure the Placement settings for CPU and Memory as Very Important for each of the Hyper-V servers。 Install the Windows Server Operating System Management Pack for Operations Manager 2007， and set the threshold。 Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). The domain contains two domain controllers named DC1 and DC2. DC1 is located in Montreal and DC2 is located in Seattle. Each domain controller has a dedicated hard disk that contains only the Active Directory database and log files. Each night, you back up the system state on all domain controllers. On DC2, the hard disk that contains Active Directory fails. You replace the failed hard disk on DC2. You need to restore domain controller functionality on DC2. The solution must minimize replication traffic between Montreal and Seattle. What should you do on DC2? （） Uninstall Active Directory and then reinstall ActiveDirectory.。 Start by using the Last Known Good Configuration.。 Start in Directory Services Restore Mode and restore the NTDS.dit file.。 Start in Directory Services Restore Mode and restore the system state.。 新规范中验收项目分为（）和一般项目。 欲把背景层转换为普通的图象图层，以下哪种做法是可行的？（）