选择题：※什么是三层交换,说说和路由的区别在那里?

预算的编制应遵循的原则是( )A.赤字预算原则B.复式预算原则 C.合法预算原则D.完整预算

共用题干 Helen and MartinWith a thoughtful sigh,Helen turned away from the window and walked back to her favourite armchair.______(1) her brother never arrive?For a brief moment,she wondered if she really cared that much.Over the years Helen had given______(

※对路由知识的掌握情况,对方提出了一个开放式的问题:简单说明一下你所了解的路由协议。

Theword“they”inLine5,Para.2refersto_.A.olderpeopleB.newthingsC.childrenD.interests

共用题干 Highways in the USThe United States is well-known for its network of major highways designed to help a driver get from one place to another in the shortest possible time.________（51)these wide. modern roads are generally smooth and well maintained,w