506.Aerodynamic forces are the basic forces acting on an aircraft in flight that are caused by the movement of the air over the surfaces Thurst acts forward, drag acts rearward, lift acts vertically upward and weight acts vertically downward

431.Set the applicable L PACK switch or the R PACK switch, on the p5-10 air conditioning panel, to the AUTO position( )

430.This will be limited to the forward and aft edges of the windshield due to the bottom edge not being visible and the top edge having the bus bar in the way( )

429.The writing rules cover aspects of grammar and style The dictionary gives the general words that a writer can use( )

428.YOU [ ] USE EAR PROTECTION WHEN YOU ARE NEAR AN ENGINE THAT IS IN OPERATION ( )

427.Make sure that the arrow points in the direction of the fuel flow( )

426.底漆层厚度必须介于 05 毫米到 06 毫米之间。( )

425.Use an oil can to lubrication the turnbuckle ( )

424.Vertical pages rather than horizontal are preferred for all types of publication ( )

423.Replace nuts and washers if removed during inspectionDo not reuse ( )

422.将旁通活门和排放活门同时拆解。 ( )