单项选择题
You are anchoring in a river where the current is from one direction only.The best way to lay out two anchors is to have them（）.
A.Directly in line with the bow B.Side by side，with their lines on the port and starboard side C.So that their lines form an angle D.On top of one another
单项选择题 Which statement is TRUE concerning equatorial tides（）.
单项选择题 Which statement is TRUE concerning apogean tides（）．
单项选择题 Which current would you encounter on a direct passage from southern Africa to Argentina，South America（）.
