[问答题] 要把邮件服务器上的邮件取到本地硬盘中，使用的是什么协议？

A Windows Communication Foundation (WCF) service has the following contract: [ServiceContract]public class ContosoService{ [OperationContract] [TransactionFlow(TransactionFlowOption.Mandatory)] [OperationBehavior(TransactionScopeRequired=true, TransactionAutoComplete=false)] void TxOp1(string value) {... }; [OperationContract(IsTerminating=true)] [TransactionFlow(TransactionFlowOption.Mandatory)] [OperationBehavior(TransactionScopeRequired=true, TransactionAutoComplete=false)] void TxOp2(string value) { ... OperationContext.Current.SetTransactionComplete(); }} The service and the clients that call the service use NetTcpBinding with transaction flow enabled. You need to configure the service so that when TxOp1 and TxOp2 are invoked under the same client session, they run under the same transaction context. What should you do?（） ["","","",""] 发生手指切断事故后,对断指应如何处置？ （），是指国家机关工作人员严重不负责任，不履行或者不正确履行职责，致使公共财产、国家和人民利益遭受重大损失的行为。 ["滥用职权罪","玩忽职守罪","受贿罪"] 市场机制的客观性表现为（）。 ["不可干预性和不可替代性","自发性和灵活性","关联性和滞后性","干预性和灵活性"] 涅杰斯 要把邮件服务器上的邮件取到本地硬盘中，使用的是什么协议？