论述知识学习的作用？
管理信息系统按照核心业务活动分类可分为电子业务系统、电子政务系统和（）
下列各项目，在利润分配中优先的是（）。 ["法定盈余公积金","公益金","优先股股利","任意盈余公积金"]
管理信息系统是在（）、系统科学、（）等的基础上发展起来的。
A Windows Communication Foundation (WCF) client uses the following service contract.(Line numbers are included for reference only.) 01 [ServiceContract] 02 public interface IService 03 { 04 [OperationContract] 05 string Operation1(); 06 [OperationContract] 07 string Operation2(); 08 } You need to ensure that all calls to Operation1 and Operation2 from the client are encrypted and signed. What should you do?（） [" Set the ProtectionLevel property in line 01 to EncryptAndSign."," Set the ProtectionLevel property in line 04 and line 06 to Sign."," Add a SecurityCriticalAttribute ror each operation."," Add a SecunitySafeCriticalAttribute for each operation."]
思维崩逸
