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A Windows Communication Foundation (WCF) solution uses the following contracts. (Line numbers are included for reference only.) 01 [ServiceContract(CallbackContract=typeof(INameService))] 02 public interface IGreetingService 03 { 04 [OperationContract] 05 string GetMessage(); 06 } 07 [ServiceContract] 08 public interface INameService 09 { 10 [OperationContract] 11 string GetName(); 12 } The code that implements the IGreetingService interface is as follows: 20 public class GreetingService : IGreetingService 21{ 22 public string GetMessage() 23 { 24 INameService clientChannel = OperationContext.Current.GetCallbackChannel(); 25 string clientName = clientChannel.GetName(); 26 return String.Format("Hello {0}", clientName); 27 } 28 } The service is self-hosted. The hosting code is as follows: 30 ServiceHost host = new ServiceHost(typeof(GreetingService)); 31 NetTcpBinding binding = new NetTcpBinding(SecurityMode.None); 32 host.AddServiceEndpoint("MyApplication.IGreetingService", binding, "net.tcp//localhost:12345"); 33 host.Open(); The code that implements the lNameService interface is as follows: 40 class NameService : INameService 41 { 42 string name; 43 public NameService(string name) 44 { 45 this.name = name; 46 } 47 public string GetName() 48 { 49 return name; 50 } 51 } Currently, this code fails at runtime, and an InvalidOperationException is thrown at line 25. You need to correct the code so that the call from the service back to the client completes successfully. What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)（） ["","","",""] 跨度为10m的预制板脱模起吊时混凝土强度允许值应达到（）。 ["A.40% ","B.50% ","C.65% ","D.75%"] 根据我国现行工程造价构成，属于固定资产投资中积极部分的是（）。 ["建安工程费","设备及工、器具购臵费","建设用地费","可行性研究费"] 结合自己性格的形成，谈谈你对“性格决定命运”这句话的理解。 跨度为7m的预制板脱模起吊时混凝土强度允许值应达到（）。 ["A.40% ","B.50% ","C.65% ","D.75%"] 腓尼基字母