救火队员之间用灯光保持视觉联系。（）<br>A:Fire party members maintain contact with lamps.<br>B:Fire party members maintain visual contact use lamps.<br>C:Fire party members maintain visual contact with lamps.<br>D:Fire party members maintain visual contact by lamps.

救火队员之间用灯光保持视觉联系。（）
A:Fire party members maintain contact with lamps.
B:Fire party members maintain visual contact use lamps.
C:Fire party members maintain visual contact with lamps.
D:Fire party members maintain visual contact by lamps.

出自：船舶水手证

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