You use Microsoft Visual Studio 2010 and Microsoft . NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a WPF window in the application. You add the following code segment to the application. public class ViewModel { public CollectionView Data { get; set; } } public class BusinessObject { public string Name { get; set; } } The DataContext property of the window is set to an instance of the ViewModel class. The Data property of the ViewModel instance is initialized with a collection of BusinessObject objects. You add a TextBox control to the Window. You need to bind the Text property of the TextBox control to the Name property of the current item of the CollectionView of the DataContext object. You also need to ensure that when a binding error occurs, the Text property of the TextBox control is set to N/A . Which binding expression should you use?（） [" { Binding Path=Data\/Name, FallbackValue='N\/A' }"," { Binding Path=Data.Name, FallbackValue='N\/A' }"," { Binding Path=Data\/Name, TargetNullValue='N\/A' }"," { Binding Path=Data.Name, TargetNullValue='N\/A' }"]
下列桥台中属于拱桥轻型桥台的是（）。 ["埋置式桥台","靠背式框架桥台","背撑式桥台","空腹式桥台"]
You have a server that runs Windows Server 2008 and has the Windows Server Virtualization （WSv）server role installed. You create a new virtual machine. You need to configure the virtual machine to meet the following requirements： Allow network communications between the virtual machine and the host system. Prevent communications with other network servers. What should you do first？（） ["Install the Microsoft Loopback Adapter.","Create a new Virtual Network Switch.","Enable Internet Connection Sharing （ICS）.","Set the Connection to None for the network interface card."]
You are the network administrator for your company. The network consists of a single Active Directory domain. All servers run Windows Server 2003. The network contains servers that have Terminal Server enabled. The terminal servers host legacy applications that currently require users to be members of the Power Users group. A new requirement in the company’s written security policy states that the Power Users group must be empty on all resource servers. You need to maintain the ability to run the legacy applications on the terminal servers when the new security requirement is implemented. What should you do？ （） [" Add the Domain Users global group to the Remote Desktop Users built-in group in the domain. "," Add the Domain Users global group to the Remote Desktop Users local group on each terminal server."," Modify the Compatws.inf security template settings to allow members of the local Users group to run the applications. Import the security template into the Default Domain Controllers Policy Group Policy object （GPO）."," Modify the Compatws.inf security template settings to allow members of the local Users group to run the applications. Apply the modified template to each terminal server."]
市盈率是指股票的每股市价与每股收益的比率，该比率高低在一定程度上反映了股票的投资价值。
“阈值”命令将灰度或彩色图像转换为高对比度的黑白图像，所有比阈值亮的像素转换为（）颜色。
