机轮刹车怎么除冰？

HOW MANY FLAPS ARE INSTALLED ON EACH WING?

HOW MANY SPOILERS ARE INSTALLED ON EACH WING?

THE FUNCTION OF THE AILERON:

THE FUNCTION OF THE SPOILER:

THE MOVEMENTS OF THE PRIMARY FLIGHT CONTROL SURFACES ARE MANAGED BY:

WHEN AN APU FIRE OCCURS ON GROUND:

THE ENGINE FIRE EXTINGUISHING SYSTEM IS SUPPLIED BY:

THE COCKPIT SLIDING WINDOWS CAN BE OPERATED FROM THE:

THE ATTENDANT INDICATION PANEL (AIP) IS LOCATED:

ON THE EXTERNAL POWER (EXT PWR) PANEL, WHEN THE "AVAIL" AND ＇NOT IN USE" LIGHTS ARE ILLUMINATED: