Afixed cost changes in direct proportion to changes in a cost driver.

在W3C XML Schema文档中要为元素赋予固定值，使用的属性是（）。 A: Afixed B: Bdefault C: Cmodel D: Dmillable

Lesson Three 课后作业-词汇填空 runway taxiway apron disembarkfreightcontrol towerhangarterminal1.Theairport________istheareaofanairportwhereaircraftareparked,unloadedorloaded, refueled, or boarded.2.Passengerstransferbetweengroundtransportationandthefacilitiesatthe_______,which allows them to board and discharge from aircraft.3.Passengersarestill subjectto bere-screenedatany timeforsecurity,eveniftheyhavejust___________fromadomesticflight.4.A_________aircraftis afixed-wingaircraftthatisdesignedorconvertedforthecarriage of cargo rather than passengers.5.At anairport,the__________isthe long stripofgroundwithahardsurface whichanaeroplane takes off from or lands on.6.Theprimary methodofcontrollingtheimmediate airport environmentisvisual observationfromtheairport___________.7.AJetBlue plane wentoffthe__________at Boston’sLogan AirportonChristmasnight,fortunately, there were no injuries.8._________isalargebuildingwithextensivefloorarea,typicallyforhousingaircraft