单项选择题
Which types of portable fire extinguishers are designed for use on electrical fires?（）
A.Dry chemical and carbon dioxide B.Foam (stored pressure) and soda-acid C.Carbon dioxide and foam (stored pressure) D.Dry chemical and soda-acid
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?（）
单项选择题 Which item may be substituted for，in the fireman’s outfit，on a cargo vessel?（）
