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。
医疗器械经营备案凭证中企业名称、法定代表人、企业负责人、住所、经营场所、经营方式、经营范围、库房地址等备案事项发生变化的，应当及时变更备案。
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。
让学生以自己的水平和速度进行学习的一种教学策略是（） 自主学习。 发现学习。 个别教学。 个别化教学。
Which class is used to specify a set of features to support on the XrnlReader object created by the Create method？（）
