单项选择题
A.must be wet before it will release B.should be kept in a watertight cover except in an emergency C.will inflate the raft in its cradle if operated manually D.must be submerged to a certain depth to release automatically
A CLEARLY MARKED WAY IN THE VESSEL WHICH HAS TO BE FOLL...
单项选择题A CLEARLY MARKED WAY IN THE VESSEL WHICH HAS TO BE FOLLOWED IN CASE OF AN EMERGENCY defines（）.
A.Escape route B.Alley way C.Corridor D.Embarking way
