You are creating a DataTable. You use the following code segment to create the DataTable. (Line numbers are included for reference only.) 01 DataTable dt = new DataTable(“Products”); 02 dt.Columns.Add(new DataColumn(“Price”, typeof(decimal))); 03 dt.Columns.Add(new DataColumn(“Quantity”, typeof(Int32))); 04 DataColumn dc = new DataColumn(“Total”, typeof(decimal)); 05 dt.Columns.Add(dc); You need to ensure that the Total column is set to the value of the Price column multiplied by the Quantity column when new rows are added or changed. What should you do? （） [" Add the following code segment after line 05. dc.ExtendedProperties["Total"] = "Price * Quantity”;"," Add the following code segment after line 05. dc.Expression = “Prince * Quantity”;"," Write an event handler for the DataTable's TableNewRow event that updates the row's Total."," Write an event handler for the DataTable's ColumnChanged event that updates the row's Total."]
You are integrating a Windows Communication Foundation (WCF) service within an enterprise-wide Service Oriented Architecture (SOA).Your service has the following service contract: [ServiceContract]public class CreditCardConfirmationService { [OperationContract] boolean ConfirmCreditCard(string ccNumber); double OrderAmount(int orderNumber);} You need to allow the code in the ConfirmCreditCard method to participate automatically in existing transactions.If there is no existing transaction, a new transaction must be created automatically. What should you do?（） [" Inside the ConfirmCreditCard method, surround the code that must participate in the transaction with a using(new TransactionScope()) block."," Inside the ConfirmCreditCard method, surround the code that must participate in the transaction with a using(new CommittableTransaction()) block."," Add an [OperationBehavior(TransactionScopeRequired=true)] attribute to the ConfirmCreditCard method."," Add an [OperationBehavior(TransactionAutoComplete=true)] attribute to the ConfirmCreditCard method."]
1岁左右婴儿会出现“分离痛苦”。
根据党和国家有关规定，为谋取（），给予党和国家工作人员或者其他从事公务的人员以财物，是行贿行为。 ["利益","个人利益","不正当利益","单位利益"]
集体心理治疗
计算机网络中主要包括哪些内容？
