相关题目
8. Many of the lights on this coast are placed so high as to be frequently obscured by ().
7. Mariners are advised not to () in the vicinity of submarine cables, and risk prosecution if cables are damaged.
6. In Admiralty Sailing Directions, heights of objects refer to the height of the structure above the ().
5. Place names used on board ships should be those ().
4. *In Admiralty Sailing Direction, the distances at sea are given in (), and on land are in().
3. The Sailing Direction contain information on ()
2. *Taking reference to the latest edition ofAdmiralty Sailing Directions, the author suggests to update Admiralty Sailing Directions by () method.
1. *Admiralty Sailing Directions are published by ().
40单选题1分一般A船位于45ºS、170ºW,测得150海里外的某遇难船B真方位为270º,假定B的位置不变,A船也无航行误差,不受外界影响,则A船:
39单选题1分一般A船位于(45ºN、170ºW),测得130ºW处B船的真方位为090º,则:
