单项选择题
Which vessel is NOT to be regarded as restricted in her ability to maneuver?（）.
A.A vessel transferring provisions while underway B.A pushing vessel and a vessel being pushed when connected in a composite unit C.A vessel servicing a navigation mark D.A vessel launching aircraft
单项选择题 Which types of portable fire extinguishers are designed for use on electrical fires?（）
单项选择题 Which statement about immersion suits is TRUE?（）
单项选择题 Which of the following would be of immediate concern after discovering a large fire in the ship’s galley?（）
