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單項(xiàng)選擇題

關(guān)閉所有防火門并使用干粉滅火器。()

A. Close all fire doors and use the dry powder extinguisher.
B. Close all fire doors and use the foam extinguisher.
C. Close all fire doors and use the CO2 extinguisher.
D. Close all fire rooms and use the dry powder extinguisher.

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