__________makesitpossibleforlanguageuserstoovercomethelimitationsoftimeandspaceincommunication.
A.Arbitrariness B.Duality C.Productivity D.Displacement正确答案D
__________makesitpossibleforlanguageuserstoovercomethelimitationsoftimeandspaceincommunication.
A.Arbitrariness B.Duality C.Productivity D.Displacement正确答案D