单项选择题
A.Oxygen deficient spaces B.Compartments containing poisonous vapors C.Fighting fires that produce heavy smoke D.Underwater search
The rescuer can best provide an airtight seal during mo...
单项选择题The rescuer can best provide an airtight seal during mouth-to-mouth resuscitation by pinching the victim’s nostrils and（）.
A.Cupping a hand around the patient's mouth B.Keeping the head elevated C.Applying his mouth tightly over the victim's mouth D.Holding the jaw down firmly
The key to rescuing a man overboard is（）.A.Good communi...
单项选择题The key to rescuing a man overboard is（）.
A.Good communication B.A dedicated crew C.Good equipment D.Well-conducted drills
The indication of a slipping anchor is a（n）（）.A.Decreas...
单项选择题The indication of a slipping anchor is a（n）（）.
A.Decrease in mooring line length B.Increase in the opposite amperage C.Increase in the opposite line tension D.Decrease in mooring line tension and amperage
