您有一个虚拟硬盘（VHD）和一台运行 Windows 7 的计算机。该VHD 安装了 Windows 7。您需要从该VHD 启动计算机。您应该怎么办？（） ["从 Diskpart.exe 运行 “选择 vdisk”","从“磁盘管理”修改活动的分区","运行 Bootcfg.exe 并指定 \/default 参数","运行 Bcdedit.exe，并修改 Windows 启动管理器设置"]
电除尘器中水煤气的含氧量，正常操作时应小于0.6%；大于0.6%时，应发出报警信号；达到（）%时，应立即切断电除尘器的电源。 ["0.7","0.8","1"]
索引会影响对基本表的（）、（）和（）等操作的速度。
Your network contains an Active Directory domain. The domain contains two sites named Site1 and Site2. Site1 contains four domain controllers. Site2 contains a read-only domain controller （RODC）. You add a user named User1 to the Allowed RODC Password Replication Group. The WAN link between Site1 and Site2 fails. User1 restarts his computer and reports that he is unable to log on to the domain. The WAN link is restored and User1 reports that he is able to log on to the domain. You need to prevent the problem from reoccurring if the WAN link fails. What should you do（） ["Create a Password Settings object （PSO） and link the PSO to User1’s user account.","Create a Password Settings object （PSO） and link the PSO to the Domain Users group.","Add the computer account of the RODC to the Allowed RODC Password Replication Group.","Add the computer account of User1’s computer to the Allowed RODC Password Replication Group."]
下列关于横道图的叙述，不正确的是（）。 ["横道图是一种最简单并运用最广的传统的计划方法","横道图用于小型项目或大型项目上，或用于计算资源需要量","横道图的另一种可能的形式是将工作简要说明直接放在横道上","因为有许多新的计划技术，所以横道图在建设领域中的应用不是很普遍"]
硫化铜精矿造锍熔炼的目的及必须遵循什么原则？
