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单选题
当出现后货舱烟雾警告信息时：when a SMOKE AFT CARGO warning message is displayed:
A
循环风扇电源断开 power is removed from the recirculated fans
B
所有的通风气流都被停止 all ventilating airflow is stopped
C
自动灭火装置被激活 auto fire extinguisher is activated
D
进气和排气关断活门被命令打开 the intake and exhaust SOVS are commanded open
答案解析
正确答案：B
