You are building a client for a Windows Communication Foundation (WCF) service. You need to create a proxy to consume this service. Which class should you use?（） [" ChannelFactory"," B. ServiceHost"," ClientRuntime"," CommunicationObject <\/tchannel>"]
双循环（不完全双循环）
Refer to the exhibit. All network links are FastEthernet. Although there is complete connectivitythroughout the network， Front Line users have been complaining that they experience slowernetwork performance when accessing the server farm than the Reception office experiences.Based on the exhibit， which two statements are true？（） ["Disabling the Spanning Tree Protocol would improve network performance","Changing the bridge priority of S1 to 36864 would improve network performance","Changing the bridge priority of S1 to 4096 would improve network performance","Changing the bridge priority of S3 to 4096 would improve network performance","Upgrading the link between S2 and S3 to Gigabit Ethernet would improve performance","Changing the bridge priority of S2 to 36864 would improve network performance"]
信息方法
会计核算应当以实际发生的交易或事项为依据，如实反映企业的财务状况、经营成果和现金流量，这是会计核算的（）。 ["可比性原则","稳健性原则","客观性原则","相关性原则"]
生态系统包括（）和（）两大部分。又可分为（）、（）、（）、（）四种基本成分
