单项选择题
A.CABIN ATTENDANT PANELS B.CABIN AREA CONTROL PANEL C.CABIN AUDIO CONTROL PANEL D.CABIN ALERT CONTROL PANEL
A.5 B.4 C.3 D.2
A.应急灯 B.所有门的自动/手动状态 C.开启/关闭地面服务电源 D.全部都有