The sound-carrying medium may be matter in any state. 下划线介词短语充当_______。

Suppose you are riding on a hot air balloon, carrying a buzzer that emits a sound of frequency f . If you accidentally drop the buzzer over the side while the balloon is rising at constant speed, the frequency and intensity of what you can hear sound as the buzzer falls toward the ground ___________ and __________ respectively. (fill in increases/decreases and use the comma to connect two choices)

In the historical development of language, sound change is inevitable, such as sound loss, sound a______ and sound movement.

Father came back, _______ a bag of money on his left shoulder. A: carrying B: he was carrying C: and carrying D: all the above

A sound mind is inseparable from a sound body. The word “sound” means______.

That ____ quite interesting. A: aren't sound B: don't sound C: isn't sound D: doesn't sound

8.Primary _________means the direct imitation of sound by sound, of natural sound by human speech sound.

Simultaneous or overlapping articulations, as when the nasal quality of a nasal sound affects the preceding or following sound so that the latter becomes nasalized. If the affected sound becomes more like the following sound, it is known as anticipatory ; if the sound shows the influence of the preceding sound, it is perseverative .​​​​

(Multiple Choice) When the volume changes, the amount of sound change is equal in both the approaching sound and the receding sound, which one is more noticeable?（ ） A: the receding sound B: the approaching sound C: both of them

______ is a process by which one sound takes on some or all the characteristics of a neighboring sound, a term often used synonymously with coarticulation. If a following sound is influencing a preceding sound, it is called regressive assimilation; the converse process, in which a preceding sound is influencing a following sound, is known as progressive assimilation.