精选优质文档-倾情为你奉上Chapter 1 Invitations to Linguistics1.1Why study language?1.Language is very essential to human beings.2.In language there are many things we should know.3.For further understanding, we need to study language scientifically.1.2What is language?1.3Design features of languageThe features that define our human languages can be called design features which can distinguish human language from any animal system of communication.1.3.1Arbitrariness1.3.