[单项选择]Flight simulator (飞行模拟器) refers to any electronic or mechanical system for training airplane and spacecraft pilots and crew member by simulating flight conditions. The purpose of simulation is not to completely substitute (31) actual flight training but to thoroughly familiarize students with the Vehicle (32) before they (33) extensive and possibly dangerous actual flight training. Simulations also is useful for review and for familiarizing pilots with new (34) to existing craft.
Two early flight simulators appeared in England within a decade after the first flight of Orville and Wilbur Wright. They were designed to enable pilots to simulate simple aircraft (35) in three dimensions: nose up or down; left wing high and right low, or vice versa; and (36) to left or right. It took until 1929, however, for a truly effective simulator, the Link Trainer, to appear, devised by Edwin A. Link, a self-educated aviator and inventor from Binghamton, N