单项选择题
You are docking a vessel．Wind and current are most favorable when they are（）.
A.crossing your course in the same direction B.crossing your course in opposite directions C.parallel to the pier from ahead D.setting you on the pier
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（）.
单项选择题 Which statement is TRUE concerning equatorial tides（）.
单项选择题 Which statement is TRUE concerning apogean tides（）．
