钒钛磁铁矿条件
A Windows Communication Foundation (WCF) solution exposes the following contract over an HTTP connection.[ServiceContract]public interface IDataService{ [OperationContract] string GetData();}Existing clients are making blocking calls to GetData. Calls to GetData take five seconds to complete.You need to allow new clients to issue non-blocking calls to get the data, without breaking any existing clients. What should you do?()

。

。 Generate a proxy class with asynchronous methods and use it for the new clients。 Add a new endpoint to the service that uses a full-duplex binding and use it for the new clients.。
评埃赫那吞宗教改革。
在除息日前,股利权从属于股票;从除息日开始,股利权与股票相分离。
我国历史上第一部文学理论专著是() 曹丕的《典论·论文》。 陆机的《文赋》。 严羽的《沧浪诗话》。 刘勰的《文心雕龙》。
下列项目中不需要进行隐蔽工程验收的项目是()。