[填空题]Ever since humans have{{U}} (36) {{/U}}the earth, they have made use of various forms of communication. Generally, this{{U}} (37) {{/U}}of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is{{U}} (38) {{/U}}through sign language in which mo- tions stand for letters, words and ideas.{{U}} (39) {{/U}}, the deaf, and the mute have had to resort to this form of{{U}} (40) {{/U}}. Many of these{{U}} (41) {{/U}}of whole words are very picturesque and exact and can be used internationally; spelling, however cannot. Body language, transmits ideas or thoughts by certain actions, either{{U}} (42) {{/U}}or unintentionally. A wink can be a way of flirting or{{U}} (43) {{/U}}that the party is only joking.{{U}} (44) {{/U}} Other forms of nonlinguistic language can be found in Braille ( a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals.{{U}} (45) {{/U}}. {{U}} (46)

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