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【简答题】
Suppose you are riding on a hot air balloon, carrying a buzzerthat 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)
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举一反三
【单选题】Let’s the radio and see what’s wrong with it!
A.
take…part
B.
tell…from
C.
separate…from
D.
take…apart
【单选题】Let’s ________ the radio and see what’s wrong with it.
A.
take apart
B.
take off
C.
take down
D.
take up