A fire extinguisher consists of a hand-held high-pressure vessel containing an agent which can be discharged to extinguish a fire.
Aregional
Bindustrial
Ccylindrical正確答案
Dtheatrical
答案與詳解
cylindrical「圓筒狀的」精準描述滅火器外觀,高壓容器多為圓筒設計以均勻承壓,為正解。
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