单项选择题
A tow that veers to the side on the end of the towline is said to（）.
A.yaw B.surge C.sway D.swing
单项选择题 A tide is called diurnal when（）.
单项选择题 A strong back refers to a（）.
单项选择题 A stretch where the channel changes from one side of theriver to the other is called a（）.
