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专四英语考前指导完形填空练习题专四英语考前指导完形填空练习题以下是我为大家搜寻整理的专四while thereilife,there ihope.英语考前指导完形填空练习题,期望能给大家带来帮忙!更多精彩内容请准时关注我们应届毕业生考试网!飞行模拟器Flight simulatorrefers toany electronicormechanical systemfor trainingairplaneand spacecraftpilots andcrewmember bysimulating flightconditions.The purposeofsimulation isnotto completelysubstitute1actual flight training buttothoroughlyfamiliarize studentswith thevehicle2before they3extensive andpossiblydangerous actualflighttraining.Simulationsalso isuseful forreview andfor familiarizingpilotswith new4toexisting craft.Two earlyflight simulatorsappeared inEngland withina decadeafterthe firstflight ofOrvilleand WilburWright.They weredesigned toenable pilots to stimulatesimple aircraft5in threedimensionsnose upor down;left winghigh andright low,or viceversa;and6toleft orright.It tookuntil1929,however,for atruly effectivesimulator,the LinkTrainer,to appear,devised byEdwin A.Link,aself-educated aviatorand inventorfromBinghamton,New York.7,〃airplane instrumentationhad beendevelopedsufficiently topermitblind flyingon instrumentsalone,but trainingpilots todo soinvolved8risk.Link builta modelof an airplane cockpitequipped9instrumentpanel andcontrols thatcould realisticallystimulate allthemovements ofanairplane.Pilots couldusethe devicefor instrumenttraining,manipulating thecontrols10instrumentreadings soas tomaintainstraight andlevel flightor11climb ordescent withnovisualreference12any horizonexcept forthe artificialone on theinstrument panel.Thetrainer wasmodified13aircraft technologyadvanced.Commercial airlinesbegan tousethe LinkTrainer forpilottraining,and the US governmentbegan purchasingthem in1934,14thousandsmore asWorld WarII approached.Technological advancesduring thewar,particularly in・electronics,helped tomake theflightsimulator increasingly15Theuse ofefficient analogcomputers inthe earlyl950s ledto furtherimprovements.Airplane cockpits,controls,and instrumentdisplayshadby thenbecome soindividualized thatit wasno longerfeasible tousea generalizedtrainer topreparepilotstofly anything16thesimplest lightplanes.By the1950s,theUSAirForce wasusingsimulators thatprecisely17the cockpitsof itsplanes.Duringtheearly1960s18digital andhybrid computerswere adopted,andtheir speedandflexibility revolutionizedsimulation systems.Furtheradvances incomputer and19technology,notably thedevelopment ofvirtual-reality simulation,have madeit possibleto20highlycomplex real-life conditions.
1.A.for B.to C.with D.onconcerned
3.A.undertake B.undergo C.underplay D.underuse
4.A.models B.modifications C.modifiers D.modica
5.A.manifestations B.manipulations C.manifestoes D.maneuvers
6.A.yawling B.yawning C.yawing D.yawping
7.A.From thenon B.From nowon C.By nowD.By then
8.A.considerable B.considerate C.considering D.considered
9.A.for B.in C.with D.on
10.A.on thepart ofB.on thebasis ofC.on thetrack ofD.ontheverge of
11.A.control B.controllable C.controlled D.controller
12.A.to B.for C.on D.in
13.A.as forB.as toC.as D.for
14.A.acquiring B.requiring C.sustaining D.retaining
15.A.actual B.realistic C.realizing D.trueC.apart fromD.but
17.A.replenished B.replaced C.replicated D.
16.A.except B.except forreposed
18.A.electronic B.electric C.electricity D.electron
19.A.program B.programmable C.programmed D.programming
20.A.resurrect B.reproduce C.resuscitate D.resume参考答案:1-5A DB BD6-10C DA CB11-15C AC AB16-20D CA DB文档内容到此结束,欢迎大家下载、修改、丰富并分享给更多有需要的人。