[问答题] 什么是晕轮效应？理解晕轮效应应对旅游服务有什么意义？

You are creating an application that consumes a Windows Communication Foundation (WCF) service. The service implements the IService contract. The client application contains the CallbackHandler class, which implements IServiceCallback.You need to ensure that a client proxy is created that can communicate with the service over a duplex channel. Which code segment should you use?（） ["","","",""] 信用证支付方式的特点是（）。 ["信用证是一种银行信用","信用证是一种商业信用","信用证是一种自足文件","信用证是一种单据的买卖"] 明式家具的设计特色：一是注重结构美，二是注重材质美，三是注重（），四是注重装饰美。 ["造型美","色彩美","形式美","简洁美"] 发现法的提出者是（） ["奥苏伯尔","布鲁纳","布卢姆","维果茨基"] 关于超链接，下列（）属性是指定链接的目标窗口。  ["Href","Name","Target","Title"] 什么是晕轮效应？理解晕轮效应应对旅游服务有什么意义？