单项选择题
As a last resort，a tourniquet can be used to（）.
A.hold a victim in a stretcher B.stop uncontrolled bleeding C.hold a large bandage in place D.restrain a delirious victim
单项选择题 An uncontrolled flow of gas，oil，or other well fluids into the atmosphere is called a（）.
单项选择题 All the traces are（）old ones.
单项选择题 A man was sighted as he fell overboard. After completing a Williamson turn，the man is not sighted. What type of search should be conducted?（）
