单项选择题
What danger is presented if a waterspout passes over a ship?（）
A.Heavy rains could cause downflooding B.Visibility could be restricted by low clouds C.Large waves could cause structural damage D.Personnel may be injured by loose deck gear blown by the wind
单项选择题 What（）to him is whether the job of a deck officer allows him to pursue his studies.
单项选择题 To warp a vessel means to（）.
单项选择题 The usual method of arranging a line on deck so that it will run out easily without kinking or fouling is（）.
