請依下文回答第 51 題至第 55 題 Historically, physicists created a graphical representation detailing the three elements of fire (firetriangle). In recent years, one more point has been added, 51 the fire tetrahedron. The fourelements needed to 52 combustion are: fuel, oxygen, heat and a chemical chain reaction. Toextinguish a fire, it is 53 to remove one or more of the four components of combustion.Removing any of these components of the fire tetrahedron will stop the other elements from interactingand not allow combustion to 54 . Firefighters work on limiting 55 (fuel that is in jeopardyof being ignited by nearby flame or from radiant heat), containing and extinguishing fire and thenoverhauling charred and burned debris from the affected areas as well as extinguishing all hidden fires toprevent a rekindle. 【題組】53 (A)forbidden (B)mandatory (C)tumultuous (D)stimulating
請依下文回答第 51 題至第 55 題： One of the primary risks of being a firefighter is that of personal physical injury. Firefighters aresusceptible to burns, smoke __51__ and crush injuries from collapsing structures. They can suffer fromheat exhaustion, as well as long-term job-related illnesses such as asthma, persistent coughing, heartdisease, cancer and lung damage. __52__ the highly physical nature of the job, all matter of bodilyharm can befall firefighters in the line of duty. Some physical fallout from the profession may notmaterialize __53__ years down the road. In addition to the physical perils, firefighters face the potentialfor mental trauma, particularly in situations involving mass __54___ . As first responders on the scene,firefighters and other rescue personnel are often faced with the high stress, high stakes environment oftrying to attend to as many people as possible, remove them from danger and assist in aiding treatment,often __55__ their duties in tenuous or unfolding situations. The elevated stress levels don’t alwaysdissipate when they leave the scene. 【題組】53 (A) since (B) until (C) while (D) yet
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