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当前，HSDPA的单小区最高速率可以达到（）

A. 14Mbps
B. 7.2Mbps
C. 14.4M

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You are developing a Windows Communication Foundation (WCF) service that returns location information for authorized law enforcement agencies. The service contract is as follows: [ServiceContract] public interface IMappingService { [OperationContract] long[] GetLocationCoordinates(String cityName); [OperationContract] long[] GetLocationOfCitizen(String ssn); } Users are authenticated and impersonated. The system uses ASP.NET roles. The members of law enforcement are members of the LawEnforcement role. You need to ensure that only members of the LawEnforcement role can call these methods. What are two possible ways to achieve this goal?（） (Each correct answer presents a complete solution. Choose two.)

Add a PrincipalPermissionAttribute to each method that should be available only to members of law enforcement. Set its SecurityAction to Demand and set the role equal to LawEnforcement.
B. Use the CurrentPrincipal property of the thread. Call the IsInRole method specifying LawEnforcement as a parameter.
Create a GenericPrincipal specifying Thread.CurrentPrincipal.Identity as the IIdentityParameter and LawEnforcement as the only value for the Roles parameter.
D. At the beginning of each method, enumerate each ClaimSet in a new WindowsClaimSet. Use the FindClaims method to locate a claim type named Role with a right named LawEnforcement.

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简述霍桑实验的步骤。

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根据《工伤保险条例》，工伤保险费的缴纳和管理方式是（）。

A. 由企业按职工工资总额的一定比例缴纳，存入社会保障基金财政专户
B. 由企业按职工工资总额的一定比例缴纳，存入企业保险基金专户
C. 由企业按当地社会平均工资的一定比例缴纳，存入社会保障基金财政专户
D. 由企业按当地社会平均工资的一定比例缴纳，存入企业保险基金专户

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简单评价布鲁纳的认知—结构学习理论？

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当前，HSDPA的单小区最高速率可以达到（）

A. 14Mbps B. 7.2Mbps C. 14.4M

简述霍桑实验的步骤。

根据《工伤保险条例》，工伤保险费的缴纳和管理方式是（）。

简单评价布鲁纳的认知—结构学习理论？

A. 14Mbps
B. 7.2Mbps
C. 14.4M