The class of fire on which a blanketing effect is essential to extinguish the fire is （）.
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Dry chemical fire extinguishers are effective on which type(s) of fire?（）
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In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links? （）
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In the implementation of VLSM techniques on a network using a single Class C IP address，which subnetmask is the most efficient for point-to-point serial links？（）
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Halon extinguishers used on a class C fire should be directed at the（）.
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Which of the listed classes of fire is considered as one involving electrical equipment?（）
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Which of the listed materials would be considered as a bunting class "C" fire?（）
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Fires rely on , , and , the three components of what fire crews refer to as “the fire triangle.”
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to develop the skill of listening for specification information,the teacher asks students to fill in the blanks with the information they hear on the tape.which stage of listening class is it at now______.