单项选择题
A.Slightly higher fuel consumption
B.Lack of directional control when backing
C.Inefficient at high shaft RPM
D.Some unusual handling characteristics
单项选择题 Which change in the condition of the seas could indicate the formation of a tropical storm or hurricane several hundred miles from your location? （）
单项选择题 When the period of beam seas equals the natural rolling period of a vessel，what will most likely occur?（）
单项选择题 When taking soundings on a floating ship，the tape should be lowered and brought back quickly to（）.