单项选择题
When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.
A.a distinctive signal B.the Morse Code signal for SOS C.a computerized voice announcement of Mayday D.your vessel's International Radio Call Sign
单项选择题 What is the primary purpose of a splint applied in first aid?（）
单项选择题 What is the normal length of anchor cable used to anchor a vessel?（）
单项选择题 What is the MOST irritating to the skin?（）
