为什么说“客我交往”是旅游服务的先决条件？
You are creating a Windows Communication Foundation (WCF) service that uses claims-based authorization. The following code retrieves the correct claim set.var claims = ServiceSecurityContext.Current.AuthorizationContext.ClaimSets[0];You need to validate that the requesting client application has included a valid DNS value in the claim. Which code segment should you use to retrieve the claim for validation?（） claims.FindClaims(ClaimTypes.Dns, Rights.PossessProperty).FirstOrDefault();。 claims.FindClaims(ClaimTypes.Dns, Rights.Identity).FirstOrDefault();。 claims.ContainsClaim(Claim.CreateDnsClaim(ClaimTypes.Dns));。 claims.Equals(ClaimTypes.Dns)。
You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance on the same physical computer. Now users report that they are unable to connect to the named instances. You check and verify that they can only connect to the default instance. You also ensure that all SQL Server instances run normally. You have to start the service which is required to connect to the named instances. Which service should you start?（） Server 。 SQL Server Agent 。 SQL Server Browser 。 SQL Active Directory Helper。
投资者进行投资时考虑的报酬时（）。 名义购买力。 名义报酬率。 通货膨胀率。 实际报酬率。
管理信息系统是一种（）。 自然系统。 人工系统。 信息处理系统。 抽象系统。
下列哪种技术能事先发现施工管理中质量、安全等方面存在的隐患。（）
