A:¬P∨¬Q
B:¬P∧¬Q
C:P∨¬Q
D:P∧¬Q
A:____that?
B: It's a radio.
A:____often listen to the radio?
B:____, I do.
A:____do you often listen to?
B: I often listen to music.
A:____do you often listen to the music?
B: In the park or at home.
下列化学用语表示正确的是( )