Acoustic phoneticians try to describe the ______ properties of t

Acoustic phoneticians try to describe the ______ properties of the stream of sounds which a speaker issues. ()
A、oral
B、mental
C、physical
D、recorded
【正确答案】：C
【题目解析】：(P17):语音学研究中有一种方法是人们通过观察声音通过空气从一个人传给另一个人的物质手段______音波,来研究声音传导的方式,它叫作声学语音学。