[多选] You develop a Web application that writes data to a file on a server. You restrict access to the file to specific Windows users. The Web application runs as CONTOSO\ASPNET. You deny anonymous access to the application in IIS. You add the following XML segment in the Web.config file.You need to ensure that the application meets the following requirements:It must impersonate the user when it writes data to the file.It must run as CONTOSO\ASPNET when a user does not access the file. Which two actions should you perform? （）

Your network consists of a single Active Directory forest. The forest contains one Active Directory domain. The domain contains eight domain controllers. The domain controllers run Windows Server 2003 Service Pack 2.   You upgrade one of the domain controllers to Windows Server 2008 R2.   You need to recommend an Active Directory recovery strategy that supports the recovery of deletedobjects. The solution must allow deleted objects to be recovered for up to one year after the date of  deletion. What should you recommend？（） Increase the tombstone lifetime for the forest.。 Increase the interval of the garbage collection process for the forest.。 Configure daily backups of the Windows Server 2008 R2 domain controller.。 Enable shadow copies of the drive that contains the Ntds.dit file on the Windows Server 2008 R2 domain controller.。 农业在经济发展中的作用是什么？ You are creating a Windows Communication Foundation (WCF) service that accepts messages from clients when they are started. The message is defined as follows:[MessageContract] public class Agent { public string CodeName { get; set; } public string SecretHandshake { get; set; }}You have the following requirements: The CodeName property must be sent in clear text. The service must be able to verify that the property value was not changed after being sent by the client. The SecretHandshake property must not be sent in clear text and must be readable by the service.What should you do?（） Add a MessageBodyMember attribute to the CodeName property and set the ProtectionLevel to Sign. Add a MessageBodyMember attribute to the SecretHandshake property and set the ProtectionLevel to EncryptAndSign.。 Add a DataProtectionPermission attribute to the each property and set the ProtectData property to true.。 Add an xmlText attribute to the CodeName property and set the DataType property to Signed. Add a PasswordPropertyText attribute to the SecretHandshake property and set its value to true.。 Add an ImmutableObject attribute to the CodeName property and set its value property to true. Add a Browsable attribute to the SecretHandshake property and set its value to false.。 楼梯预制中原材料砂应选择（）。 A.细砂 。 B.中砂 。 C.粗砂 。 D.细砂或中砂。 构成数据流图的主要成分有哪些？ You develop a Web application that writes data to a file on a server. You restrict access to the file to specific Windows users. The Web application runs as CONTOSO\ASPNET. You deny anonymous access to the application in IIS. You add the following XML segment in the Web.config file.You need to ensure that the application meets the following requirements:It must impersonate the user when it writes data to the file.It must run as CONTOSO\ASPNET when a user does not access the file. Which two actions should you perform? （）