单项选择题
A.buoy B.mark C.beacon D.channel
----How answers? -----（）(舵很灵) ！A. No steerageB. Ans...
单项选择题----How answers? -----（）(舵很灵) ！
A. No steerage B. Answers back C. Answers all right D. No answer
How answers? -----（）(舵反转) ！A. No steerageB. Answers...
单项选择题How answers? -----（）(舵反转) ！
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
