（）is not a job of the radar antenna.<br>A:To receive the high-frequency pulses from the transmitter<br>B:To focus the pulses into a beam，and send them into space<br>C:To pick up reflected pulses coming from objects that have been struck by the beam<br>D:To reflect microwaves

（）is not a job of the radar antenna.
A:To receive the high-frequency pulses from the transmitter
B:To focus the pulses into a beam，and send them into space
C:To pick up reflected pulses coming from objects that have been struck by the beam
D:To reflect microwaves

出自：海船船员证

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