单项选择题
A fire is considered "under control" when （）.
A.all hands are at their fire stations B.all fire-fighting equipment is at the scene C.the fixed systems are activated D.the fire is contained and no longer spreading
单项选择题 The approval period for a shipboard oil pollution emergency plan expires after （）.
单项选择题 The Oil Record Book must be maintained onboard the vessel for （）.
单项选择题 Which of the following operations aboard a tanker must be recorded in the Oil Record Book（）.
