单选题In order to ensure that a RACON signal is displayed on the radar，you should（）.Aincrease the brilliance of the PPI scopeBturn off the interference controls on the radarCuse the maximum available range settingDincrease the radar signal output
单选题
In order to ensure that a RACON signal is displayed on the radar，you should（）.
A
increase the brilliance of the PPI scope
B
turn off the interference controls on the radar
C
use the maximum available range setting
D
increase the radar signal output
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