518.通气油箱排放单向活门是在 1 号和 2 号主油箱外侧油箱端部肋上。 ( )

419.Those instructions necessary to park or store the aircraft in normal or abnormal conditions such as with engines removed aircraft damaged, etc for short or long terms in extremes of weather conditions( )

418.When the engine RPM decreases to 500, stop the engine( )

417.在烤箱里烘干油滤。 ( )

416.Basically, it is a guide to industry standardization of proven concepts to be presented in a form most useful to pilots ( )

415.When the selector is in the 100% position, the user will( ) pure oxygen ( )

414.Turn the knob switch( )

413.让部件的温度下降直到其与周围的温度一致。( )

412.Unless the manufacturer＇s instructions tell you differently, do the procedure that fallows( )

411.Do an inspection of the component interface and the adjacent area ( )

410.The localizer course is aligned with the centerline of the runway,and the glideslope path is at a constant angle to the threshold of the runway ( )