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关闭所有防火门并使用干粉灭火器。()……

关闭所有防火门并使用干粉灭火器。()

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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