单项选择题

Which of the following is NOT mentioned in the passage as a function of electronics in television transmission

A．The sending of impulses through a wire.
B．The transmission of voice from one TV set to another.
C．The conversion of an image into electronic impulses.
D．The feeding of impulses into the receiver.

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热门试题

单项选择题What is said about the blocks of flats built in the past in Britain

A．They were mostly inhabited by people who did not earn much.
B．They were usually not large enough to accommodate big families.
C．They were sold to people before necessary facilities were installed.
D．They provided playground for children on the top of the buildings.

单项选择题Which of the following is the smallest

A．A pinhead.
B．A rounded bacterium.
C．A microscope.
D．A rod-shaped bacterium.