How many different forms of communication are mentioned here?
Giải thích
Chọn đáp án C
Giải thích: Bao gồm: oral speech, sign language, Body language, ,Braille , signal flags, Morse code, smoke signals, Road maps, picture signs
Chọn đáp án C
Giải thích: Bao gồm: oral speech, sign language, Body language, ,Braille , signal flags, Morse code, smoke signals, Road maps, picture signs