单项选择题
In relation to cargo gear，what does SWL mean?（）.
A.Safe working load B.Ship's working lift C.Starboard wing lift D.Stress，weight，load
单项选择题 In nautical terminology a dog is a（）.
单项选择题 If the engine of a survival craft does not start，check to see（）.
单项选择题 If a gasoline engine turns over freely but will not start，the cause is generally（）.
