单项选择题
A.commisives B.directives C.expressives D.declaratives
A.phoneme B.word C.phrase D.sentence
A.Case Condition B.parameter C.Adjacent Condition D.Adjacent Parameter
A.hierarchical B.linear C.tree diagram D.vertical
A.kibl B.bkil C.ilkb D.ilbk
A.the conventional nature of language B.the creative nature of language C.the universality of language D.the big difference between human language and animal communication