A.互相對(duì)話B.自說(shuō)自聽(tīng)、己說(shuō)人聽(tīng)C.多與家人交流D.多參加社交活動(dòng)
A.聲調(diào)B.聲、韻、調(diào)C.讀音D.節(jié)奏
A.上B.中C.下D.平