填空题
A--round live
B--sound movie
C--stereo output
D--microphone volume
E--maximum echo
F--karaoke CD
G--return
H--video output
I--audio output
J--video CD player
K--power
L--digital counter
M--fast forward rewind
N--key control
O--LCD screen
P--remote cut-off
Q--disc open/close
R--left Channel