______ provides speakers with an opportunity to talk about a wide range of things, free from barriers caused by separation in time and place. ()
A.Arbitrariness B.Productivity C.Duality D.Displacement正确答案D
______ provides speakers with an opportunity to talk about a wide range of things, free from barriers caused by separation in time and place. ()
A.Arbitrariness B.Productivity C.Duality D.Displacement正确答案D