某企业2006年发生债务利息50万元（其中费用化的利息为30万，资本化的利息为20万），2007年债务利息与2006年相同，实现净利润120万元，所得税税率为25％。该企业2007年的已获利息倍数为（） 7.2。 3.8。 6.4。 4.2。
变压器差动不平衡电流是怎样产生的？
You are creating a Windows Communication Foundation (WCF) service that is implemented as follows. (Line numbers are included for reference only.) 01 [ServiceContract] 02 [ServiceBehavior(IncludeExceptionDetailsInFaults = true)] 03 public class OrderService 04 { 05 [OperationContract] 06 public void SubmitOrder(Order anOrder) 07 { 08 try 09 { 10 ... 11 } 12 catch(DivideByZeroException ex) 13 { 14 ... 15 } 16 } 17 } You need to ensure that the stack trace details of the exception are not included in the error information sent to the client. What should you do?（） Replace line 14 with the following line: throw;。 Replace line 14 with the following line: throw new FaultException(anOrder, ex.ToString());。 After line 05, add the following line: [FaultContract(typeof(FaultException))] Replace line 14 with the following line: throw ex;。 Alter line 05, add the following line: [FaultContract(typeof(FaultException))] Replace line 14 with the following line: throw new FaultException(anOrder, "Divide by zero exception"); 。
下列说法正确的是（） 对于密度不变的不可压流，速度的散度必为0。。 对于密度不变的不可压流，速度的旋度必为0。。 对于密度不变的不可压流，一定有位函数。。 对于无旋流，速度的散度必为0。
A server named DC1 has the Active Directory Domain Services （AD DS） role and the Active Directory Lightweight Directory Services （AD LDS） role installed. An AD LDS instance named LDS1 stores its data on the c： drive. You need to relocate the LDS1 instance to the D： drive. Which three actions should you perform in sequence（） A。 B。 C。 D。 E。 F。
订立保险合同，保险人就保险标的或者被保险人的有关情况提出询问的，投保人应当履行（）义务。
