Task 4
A--cassette tape
B--closed circuit television
C--English lecture record
D--projection screen
E--slide projector
F--program recorder
G--microphone
H--educational picture
I--film strip
J--video tape
K--television set
L--teleboard
M--Mickey Mouse
N--concept film
O--educational television
P--double earphone
Q--single earphone
R--radio Set
S--synchrophone
T--terrestrial globe
U--earphone jack
V--reading machine

Task 4
A--cassette tape
B--closed circuit television
C--English lecture record
D--projection screen
E--slide projector
F--program recorder
G--microphone
H--educational picture
I--film strip
J--video tape
K--television set
L--teleboard
M--Mickey Mouse
N--concept film
O--educational television
P--double earphone
Q--single earphone
R--radio Set
S--synchrophone
T--terrestrial globe
U--earphone jack
V--reading machine（）电视显示板（）无线电收录机

Task 4
A--cassette tape
B--closed circuit television
C--English lecture record
D--projection screen
E--slide projector
F--program recorder
G--microphone
H--educational picture
I--film strip
J--video tape
K--television set
L--teleboard
M--Mickey Mouse
N--concept film
O--educational television
P--double earphone
Q--single earphone
R--radio Set
S--synchrophone
T--terrestrial globe
U--earphone jack
V--reading machine