单项选择题
The necessity for administering artificial respiration may be recognized by the victims （）.
A.vomiting B.blue color and lack of breathing C.irregular breathing D.unconscious condition
单项选择题 Which of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?（）
单项选择题 The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.
单项选择题 In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.
