—Have you got the news about Jack? I hav

搜题请搜索小程序“爱下问搜题”

问题选择题

— Have you got the news about Jack? I haven't seen him for many years.

— He _____ in a company for two years. Now he is a teacher. [ ]

A. worked

B. has worked

C. had worked

D. would work

答案

答案：A

单项选择题

运行下面的程序后，输出的结果为 Cls Dim t(5,5)as Integer For i=1 To 5:t(i,i)=1:Next For i=1 To 5 　　For j=1 To 5 　　　　Print t(i,j)，　　Next 　　Print 　　Next

A．1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

B．1 11 1 1

C．1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1

D．1 1 1 1 1

单项选择题

网络拓扑设计的优劣将直接影响着网络的性能、可靠性与( )。

A．网络协议

B．通信费用

C．设备种类

D．主机类型