I want to ___________ a bus to Shijiazhuang.[ ]
A. by
B. take
C. taking
答案:B
It is the photo we took years ago __________ we were at university_________ often calls up my memories of my college life.
A.that; that
B.when; where
C.when; that
D.that; where
在使用路由器R的TCP/IP网络中,两主机通过一路由器互联,提供主机A和主机 B应用层之间通信的层是 (11) ,提供机器之间通信的层是 (12) ,具有IP层和网络接口层的设备 (13) 。在A与R和R与B使用不同物理网络的情况下,主机A和路由器R之间传送的数据帧与路由器R和主机B之间传送的数据帧 (14) ,A与R之间传送的IP数据报和R与B之间传送的IP数据报 (15) 。
A.传输层
B.应用层
C.IP层
D.网络接口层