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
单项选择题 The key to rescuing a man overboard is（）.
单项选择题 The indication of a slipping anchor is a（n）（）.
单项选择题 The Coordinator Surface Search（CSS）in a SAR situation should display by night（）.
