单项选择题
A. No steerage B. Answers back C. Answers all right D. No answer
This is a （）(罗兰).A. compassB. direction finderC. loranD...
单项选择题This is a （）(罗兰).
A. compass B. direction finder C. loran D. sextant
Officers use sextants to observe （）.A. starsB. celestia...
单项选择题Officers use sextants to observe （）.
A. stars B. celestial bodies C. the sun D. the moon
The telegraph is the（）(设备)that connects the engine room...
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
