英语专四考试完形填空练习题（4）
<p>英语专四考试完形填空练习题(4)</p><p> <span word="Flight">Flight</span> <span word="simulator">simulator</span> (飞行模拟器) <span word="refers">refers</span> <span word="to">to</span> <span word="any">any</span> <span word="electronic">electronic</span> <span word="or">or</span> <span word="mechanical">mechanical</span> <span word="system">system</span> <span word="for">for</span> <span word="training">training</span> <span word="airplane">airplane</span> <span word="and">and</span> <span word="spacecraft">spacecraft</span> <span word="pilots">pilots</span> <span word="and">and</span> <span word="crew">crew</span> <span word="member">member</span> <span word="by">by</span> <span word="simulating">simulating</span> <span word="flight">flight</span> <span word="conditions">conditions</span>. <span word="The">The</span> <span word="purpose">purpose</span> <span word="of">of</span> <span word="simulation">simulation</span> <span word="is">is</span> <span word="not">not</span> <span word="to">to</span> <span word="completely">completely</span> <span word="substitute">substitute</span> (1)_____ <span word="actual">actual</span> <span word="flight">flight</span> <span word="training">training</span> <span word="but">but</span> <span word="to">to</span> <span word="thoroughly">thoroughly</span> <span word="familiarize">familiarize</span> <span word="students">students</span> <span word="with">with</span> <span word="the">the</span> <span word="vehicle">vehicle</span> (2)_____ <span word="before">before</span> <span word="they">they</span> (3)_____ <span word="extensive">extensive</span> <span word="and">and</span> <span word="possibly">possibly</span> <span word="dangerous">dangerous</span> <span word="actual">actual</span> <span word="flight">flight</span> <span word="training">training</span>. <span word="Simulations">Simulations</span> <span word="also">also</span> <span word="is">is</span> <span word="useful">useful</span> <span word="for">for</span> <span word="review">review</span> <span word="and">and</span> <span word="for">for</span> <span word="familiarizing">familiarizing</span> <span word="pilots">pilots</span> <span word="with">with</span> <span word="new">new</span> (4)_____ <span word="to">to</span> <span word="existing">existing</span> <span word="craft">craft</span>.</p><p> <span word="Two">Two</span> <span word="early">early</span> <span word="flight">flight</span> <span word="simulators">simulators</span> <span word="appeared">appeared</span> <span word="in">in</span> <span word="England">England</span> <span word="within">within</span> <span word="a">a</span> <span word="decade">decade</span> <span word="after">after</span> <span word="the">the</span> <span word="first">first</span> <span word="flight">flight</span> <span word="of">of</span> <span word="Orville">Orville</span> <span word="and">and</span> <span word="Wilbur">Wilbur</span> <span word="Wright">Wright</span>. <span word="They">They</span> <span word="were">were</span> <span word="designed">designed</span> <span word="to">to</span> <span word="enable">enable</span> <span word="pilots">pilots</span> <span word="to">to</span> <span word="stimulate">stimulate</span> <span word="simple">simple</span> <span word="aircraft">aircraft</span> (5)_____ <span word="in">in</span> <span word="three">three</span> <span word="dimensions">dimensions</span>： <span word="nose">nose</span> <span word="up">up</span> <span word="or">or</span> <span word="down">down</span>; <span word="left">left</span> <span word="wing">wing</span> <span word="high">high</span> <span word="and">and</span> <span word="right">right</span> <span word="low">low</span>， <span word="or">or</span> <span word="vice">vice</span> <span word="versa">versa</span>; <span word="and">and</span> (6)_____ <span word="to">to</span> <span word="left">left</span> <span word="or">or</span> <span word="right">right</span>. <span word="It">It</span> <span word="took">took</span> <span word="until">until</span> 1929， <span word="however">however</span>， <span word="for">for</span> <span word="a">a</span> <span word="truly">truly</span> <span word="effective">effective</span> <span word="simulator">simulator</span>， <span word="the">the</span> <span word="Link">Link</span> <span word="Trainer">Trainer</span>， <span word="to">to</span> <span word="appear">appear</span>， <span word="devised">devised</span> <span word="by">by</span> <span word="Edwin">Edwin</span> <span word="A">A</span>. <span word="Link">Link</span>， <span word="a">a</span> <span word="self">self</span>-<span word="educated">educated</span> <span word="aviator">aviator</span> <span word="and">and</span> <span word="inventor">inventor</span> <span word="from">from</span> <span word="Binghamton">Binghamton</span>， <span word="New">New</span> <span word="York">York</span>. (7)_____， <span word="airplane">airplane</span> <span word="instrumentation">instrumentation</span> <span word="had">had</span> <span word="been">been</span> <span word="developed">developed</span> <span word="sufficiently">sufficiently</span> <span word="to">to</span> <span word="permit">permit</span> <span word="blind">blind</span> <span word="flying">flying</span> <span word="on">on</span> <span word="instruments">instruments</span> <span word="alone">alone</span>， <span word="but">but</span> <span word="training">training</span> <span word="pilots">pilots</span> <span word="to">to</span> <span word="do">do</span> <span word="so">so</span> <span word="involved">involved</span> (8)_____ <span word="risk">risk</span>. <span word="Link">Link</span> <span word="built">built</span> <span word="a">a</span> <span word="model">model</span> <span word="of">of</span> <span word="an">an</span> <span word="airplane">airplane</span> <span word="cockpit">cockpit</span> <span word="equipped">equipped</span> (9)_____ <span word="instrument">instrument</span> <span word="panel">panel</span> <span word="and">and</span> <span word="controls">controls</span> <span word="that">that</span> <span word="could">could</span> <span word="realistically">realistically</span> <span word="stimulate">stimulate</span> <span word="all">all</span> <span word="the">the</span> <span word="movements">movements</span> <span word="of">of</span> <span word="an">an</span> <span word="airplane">airplane</span>. <span word="Pilots">Pilots</span> <span word="could">could</span> <span word="use">use</span> <span word="the">the</span> <span word="device">device</span> <span word="for">for</span> <span word="instrument">instrument</span> <span word="training">training</span>， <span word="manipulating">manipulating</span> <span word="the">the</span> <span word="controls">controls</span> (10)_____ <span word="instrument">instrument</span> <span word="readings">readings</span> <span word="so">so</span> <span word="as">as</span> <span word="to">to</span> <span word="maintain">maintain</span> <span word="straight">straight</span> <span word="and">and</span> <span word="level">level</span> <span word="flight">flight</span> <span word="or">or</span> (11)_____ <span word="climb">climb</span> <span word="or">or</span> <span word="descent">descent</span> <span word="with">with</span> <span word="no">no</span> <span word="visual">visual</span> <span word="reference">reference</span> (12)_____ <span word="any">any</span> <span word="horizon">horizon</span> <span word="except">except</span> <span word="for">for</span> <span word="the">the</span> <span word="artificial">artificial</span> <span word="one">one</span> <span word="on">on</span> <span word="the">the</span> <span word="instrument">instrument</span> <span word="panel">panel</span>. <span word="The">The</span> <span word="trainer">trainer</span> <span word="was">was</span> <span word="modified">modified</span> (13)_____ <span word="aircraft">aircraft</span> <span word="technology">technology</span> <span word="advanced">advanced</span>. <span word="Commercial">Commercial</span> <span word="airlines">airlines</span> <span word="began">began</span> <span word="to">to</span> <span word="use">use</span> <span word="the">the</span> <span word="Link">Link</span> <span word="Trainer">Trainer</span> <span word="for">for</span> <span word="pilot">pilot</span> <span word="training">training</span>， <span word="and">and</span> <span word="the">the</span> <span word="US">US</span> <span word="government">government</span> <span word="began">began</span> <span word="purchasing">purchasing</span> <span word="them">them</span> <span word="in">in</span> 1934， (14)_____ <span word="thousands">thousands</span> <span word="more">more</span> <span word="as">as</span> <span word="World">World</span> <span word="War">War</span> <span word="II">II</span> <span word="approached">approached</span>.</p>
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