单项选择题
The first step you would take in helping an unconscious victim who is not breathing is（）
A.stop bleeding B.open airway C.mouth-to-mouth respiration D.call for help
单项选择题 Your assigned emergency station aboard ship can be found on the ship’s （）
单项选择题 The minimum amount of oxygen required to support life is（）
单项选择题 What type of oil is not covered in the oil pollution law?（）
