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
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单项选择题
An uncontrolled flow of gas，oil，or other well fluids into the atmosphere is called a（）.
A.flow
B.breakout
C.kick
D.blowout -
单项选择题
All the traces are（）old ones.
A.clear
B.evident
C.obvious
D.apparently -
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?（）
A.Expanding circle
B.Sector search
C.Parallel track pattern
D.Datum-drift search
