单项选择题

Generally speaking，the most favorable bottom for anchoring is（）.

A.very soft mud
B.rocky
C.a mixture of mud and clay
D.loose sand

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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（）.

A.flow
B.breakout
C.kick
D.blowout
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