A. only some cultures have signs, signals, and symbols
B. signs, signals, symbols, and gestures are forms of communication
C. symbols are very easy to define and interrupt
D. waving and handshaking are not related to culture
Đáp án : B
Dòng đầu đoạn cuối: Although signals, signs, symbols, and gestures are very useful, they do have a major disadvantage in communication
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