（）是一种搭设于立柱之上且可沿立柱升降的施工作业平台. A.安全网 。 B.电动桥式脚手架 。 C.钢管脚手架 。 D.双排脚手架。
简述个别化教学及其环节。
Your network contains a DHCP server named DHCP1. You have a DHCP reservation for a computer named Computer1.You add a DNS server option to the reservation.You need to ensure that Computer1 immediately receives the new option.What should you do？（） Run ipconfig.exe /renew.。 Run ipconfig.exe /registerdns.。 On DHCP1, recreate the reservation.。 On DHCP1, delete the active lease for the reservation.。
切创、砍创与刺创有哪些不同点？
You are developing a Windows Communication Foundation (WCF) service that allows customers to update financial data. The client applications call the service in a transaction. The service contract is defined as follows. (Line numbers are included for reference only.) 01 [ServiceContract] 02 public interface IDataUpdate 03 { 04 [OperationContract] 05 [TransactionFlow(TransactionFlowOption.Mandatory)] 06 void Update(string accountNumber, double amount); 07 } 08 09 ... 10 class UpdateService : IDataUpdate 11 { 12 [OperationBehavior(TransactionScopeRequired = true, TransactionAutoComplete = true)]13 public void Update(string accountNumber, double amount) 14 { 15 try 16 { 17 ... 18 } 19 catch(Exception ex) 20 { 21 WriteErrorLog(ex); 22 ... 23 } 24 } 25 } 26Customers report that the transaction completes successfully even if the Update method throws an exception.You need to ensure that the transaction is aborted if the Update method is not successful. What should you do? （） Insert the following line at line 22: throw;。 Insert the following line at line 09: [ServiceBehavior(TransactionAutoCompleteOnSessionClose=false)]。 Replace line 12 with the following line: [OperationBehavior(TransactionScopeRequired=true, TransactionAutoComplete= false)]。 Insert the following line at line 09.: [ServiceBehavior(TransactionAutoCompleteOnSessionClose=true)]。
当代科学技术的基础主要包括（）
