单项选择题
How can the Coast Guard determine that a crew member is “able to understand any order spoken by the officers”?（）
A.Require a demonstration by the officer and the crew member B.Require a written test C.Require that an interpreter be provided D.All of the above
单项选择题 How are riveted lap joints made watertight?（）
单项选择题 Hot air can hold（）.
单项选择题 Horizontal subdivision decks forming watertight compartments in the columns of a semisubmersible ship increase the unit’s（）.
