A、 one-way communication
B、 four-way communication
C、 two-way communication
D、 three-way communication
A、 pace
B、 rate
C、 pitch
D、 pause
A、video
B、objects and models
C、photos and drawings
D、powerpoint
A、vocal and facial expression
B、animation
C、a lively sense of communication
D、directness
A、对
B、错
A、对
B、错
A、对
B、错
A、错
B、对
A、对
B、错
A、错
B、对