【单选题】If (如果) he isn’t at school. Please call me _______ 453-7868. [ ]
【简答题】Big Ben is really famous, but I think it’s not so famous as BuckinghamPalace!( )
【单选题】I hear Dandong is a beautiful city. —Yes, it’s famous ______ its rice and seafood. A. for B. as C. of D. by
【简答题】某学校准备建立校园网,向Internet管理机构申请了1个B类地址和10个C类IP地址,那么在理论上这个学校最多能够连入Internet的主机数目是多少?