荣格心理学的一个最重大发现之一是对心理类型的研究。他划分了内倾和外倾两种态度类型，还从功能类型角度提出了四种功能类型，它们分别是：（）（）（）（）
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You are developing a Windows Communication Foundation (WCF) service. The service needs to access out-of-process resources.You need to ensure that the service accesses these resources on behalf of the originating caller. What should you do?（）
A. Set the value of ServiceSecurityContext.Current.WindowsIdentity.ImpersonationLevel to TokenlmpersonationLevel.Impersonation
B. Set the value of ServiceSecurityContext.Current.Windowsldentity.ImpersonationLevel to TokenlmpersonationLevel.Delegation
C. Set the PrincipalPermissionAttribute on the service contract and update the binding attribute in the endpoint element of the configuration file to wsHttpBinding
D. Set the PnncipalPermissionAttribute on the service contract and update the bindingConfiguration attribute in the endpoint element of the configuration file to wsHttpBinding
网络客户服务的优势包括（）
A. 提高客户服务成本
B. 提高客户服务效率
C. 提供更高层次的服务
D. 促进服务手段的多样化
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