单项选择题
Officers use sextants to observe ().
A. stars
B. celestial bodies
C. the sun
D. the moon
点击查看答案&解析
相关考题
-
单项选择题
The telegraph is the()(设备)that connects the engine room and the bridge.
A.gear
B.equipment
C.engine
D.sextant -
单项选择题
The captain wants to see the ().
A. chief officer
B. second officer
C. third officer
D. carpenter -
单项选择题
Echo sounder sends a() (无线电信号)from the bottom of the ship to the seabed.
A. radio signal
B. radio wave
C. signal
D. signal radio
