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三.判断题 (共18题,共36分)
38.when an electric appliance or line is on fire, it is necessary to cut off the power supply first, and then use a dry powder fire extinguisher or a gas fire extinguisher to extinguish the fire. do not directly splash water to prevent electric shock or elec (2分)
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When an electrical appliance or line is on fire, cutting off the power supply first is crucial to prevent electric shock. Water is a conductor of electricity, so directly splashing water can cause electric shock or further electrical accidents. Dry powder or gas fire extinguishers are non - conductive and suitable for extinguishing electrical fires.
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