单项选择题
What is the purpose of cant frames in steel vessels? （）
A.To support the overhang of the stern B.To provide strength to shell plating at the stern C.To add strength to the deck beams which support the weather decks D.To support the plating of a cylindrical tank
单项选择题 What is the purpose of a striker plate? （）
单项选择题 What is NOT used as a stern tube bearing，on a large vessel? （）
单项选择题 What best describes the structure from which Stratford Point Light is shown?（）
