赞题库-背景图
单项选择题

Television is a ______ in the transmission of message.

A．sender
B．receiver
C．transmitting device
D．none of the above
<上一题 目录 下一题>
热门试题

单项选择题In this passage, optical can be understood as related to.

A．light
B．audio
C．electronics
D．multimedia

单项选择题Which of the aspects of telecommunication is NOT mentioned in the passage

A．Current development.
B．Transmission of message.
C．Computer networking.
D．Government regulation.