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<单选题>After extinguishing a fire with CO2，it is advisable to（）. 解析
<单选题>According to the regulations，what fire safety control feature is required in quick-closing shut off valves?（）解析
<单选题>A foam-type portable fire extinguisher is most useful in fighting a fire in（）. 解析
<单选题>A ship must have a self-contained breathing apparatus to be used as protection from gas leaking from a refrigeration unit. To meet this requirement，you may use（）. 解析
<单选题>An aircraft has indicated that he wants you to change course and follow him. You cannot comply because of an emergency on board. Which signal should you make?（）解析
<单选题>A fire starts on your vessel while refueling. You should FIRST（）. 解析
<单选题>An effective method for moving patients with spinal injuries onto a spine board is known as the（）. 解析
<单选题>A GROUP OF CREW MEMBERS TRAINED FOR FIGHTING FLOODING IN THE VESSEL are known as（）. 解析
<单选题>An important step in fighting any electrical fire is to（）. 解析
<单选题>A CO2 portable extinguisher is annually checked by（）. 解析
<单选题>An advantage of a dry chemical over a carbon dioxide fire extinguisher is its（）. 解析
<单选题>All of the following are part of the fire triangle EXCEPT（）. 解析
<单选题>Any firefighting equipment that is carried in addition to the minimum required must（）. 解析
<单选题>All portable fire extinguishers must be capable of being（）. 解析
<单选题>After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）. 解析

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