单项选择题
Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）
A.Insure the chemical is powdery B.Replace the cartridge C.Pressure test the discharge hose D.Test the pressure gauge for proper operation
单项选择题 Where would you find the FCC authorization for transmitting on your ship’s EPIRB?（）
单项选择题 Where should life jackets be stowed?（）.
单项选择题 Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.
