We refer to the limited range of sounds as the phonic medium of language and individual sounds within that range as ______.
A、vowelsD
在语言交际中占有一席之地、由人类的发音器官所发出来的声音在数量上是有限的。这些范围有限，但对人类交际活动意义重大、对语言学研究价值不菲的声音就是语言的音响媒介，凡是在这个范围内的每个单个的声音都叫做语音。
The basic unit in the study of morphology is ______.
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
The engineer ______ my father works is about 50 years old.
Theengineer______myfatherworksisabout50yearsold.
Accordingtothe"principles-and-parameters"theory,"principles"refertohighlyabstractpropertiesofgrammarwhichareappliedtolanguageingeneralandwhichgeneratephrasesandatthesametimerestrainthepowerofMovea,while"parameters"allowgeneralprinciplestooperateincertainrestrictedways,accordingtowhichparticulargrammarsofnaturallanguagesvary.
