单项选择题
A.impact B.imports C.impedes D.impair
Whatever the speaker communicates is the message, which...
单项选择题Whatever the speaker communicates is the message, which is sent（）a particular channel.
A.by all means B.by no means C.by any means D.by means of
The speech communication process（）includes seven elemen...
单项选择题The speech communication process（）includes seven elements.
A.in the hole B.at a whole C.as a whole D.to the whole
Effective speakers adjust their voices（）the larger audi...
单项选择题Effective speakers adjust their voices（）the larger audience and work（）avoiding distracting physical mannerism and verbal habits.
A.at； to B.in； at C.to； at D.to； for
