单项选择题 A person may operate an air compressor in which of the following areas on board a tank barge?（）

单项选择题 A person has suffered a laceration of the arm. Severe bleeding has been controlled by using a sterile dressing and direct pressure. What should you do next?（）

单项选择题 A person has fallen overboard and is being picked up with a lifeboat. If the person appears in danger of drowning，the lifeboat should make（）.