( ) If a person who is always late for work is late once again and blames it on a train, co-workers would probably attribute that person's lateness to ______________.
【单选题】If the local receiver of GPS is normal, but some equipments using GPS signal can’t get the signal, the possible malfunctioning equipment is ______.
【单选题】Normally, pressurization problems are caused by a malfunctioning of the pressure outflow or the pressure regulating valves respectively, which allows the air to ______ out of the pressurized cabin.