单项选择题

A victim is coughing and wheezing from a partialobstruction of the airway. An observer should （）.

A.perform the Heimlich maneuver
B.immediately start CPR
C.give back blows and something to drink
D.allow the person to continue coughing and dislodge the obstruction on his own

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A victim has suffered a second-degree burn to a small area of the lower arm. What is the proper treatment for this injury?（）

A.Immerse the arm in cold water for 1 to 2 hours，apply burn ointment，and bandage
B.Open any blisters with a sterile needle，apply burn ointment and bandage
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A shipmate suffers a heart attack and stops breathing. You must（）.

A.administer oxygen
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D.immediately give a stimulant，by force if necesssary

单项选择题

A shipmate chokes suddenly，cannot speak，and starts to turn blue. You should（）.

A.perform the Heimlich maneuver
B.make the victim lie down with the feet elevated to get blood to the brain
C.immediately administer CPR
D.do nothing until the victim becomes unconscious