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
One of the main functions of the Reference Department is to（）

A．consult students about the books required for their studies
B．provide work for students in the library
C．provide books for students to consult
D．test students' ability to use the resources in libraries
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