单项选择题

Applauding is specifically mentioned as an example of ______.

A．communication by sound
B．gesture and mini-cry
C．communication by touch
D．a simple system of visual communication
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单项选择题
The author explains that he will deal with reception of communication first because ______.
A．communication actually takes place when the message is received
B．there are more means of receiving than sending communications
C．reception of communications involved use of the senses
D．it is difficult to organize by type the means of sending communications
单项选择题
Which of the following statements about communication by touch is true
A．Touch is not important as a means of communication.
B．There is no well-developed system of communication based on touch.
C．It is possible to communicate intelligently by touch alone.
D．Touch must accompany visual communication.
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