2015年职称英语理工类A级阅读理解试题以及答案(5)
<p> <span word="Flying">Flying</span> <span word="the">the</span> <span word="Hypert">Hypert</span>1 <span word="Skies">Skies</span></p><p> <span word="The">The</span> <span word="Hyper">Hyper</span>-<span word="X">X</span>2 <span word="recently">recently</span> <span word="broke">broke</span> <span word="the">the</span> <span word="record">record</span> <span word="for">for</span> <span word="air">air</span>-<span word="breathing">breathing</span> <span word="jet">jet</span> <span word="planes">planes</span> <span word="when">when</span> <span word="it">it</span> <span word="traveled">traveled</span> <span word="at">at</span> <span word="a">a</span> <span word="hypersonic">hypersonic</span> <span word="speed">speed</span> <span word="of">of</span> <span word="seven">seven</span> <span word="times">times</span> <span word="the">the</span> <span word="speed">speed</span> <span word="of">of</span> <span word="sound">sound</span>.<span word="Thats">Thats</span> <span word="about">about</span> 5,000 <span word="miles">miles</span> <span word="per">per</span> <span word="hour">hour</span>.<span word="At">At</span> <span word="this">this</span> <span word="speed">speed</span>，<span word="youd">youd</span> <span word="get">get</span> <span word="around">around</span> <span word="the">the</span> <span word="world">world</span><span word="flying">flying</span> <span word="along">along</span> <span word="the">the</span> <span word="equator">equator</span><span word="in">in</span> <span word="less">less</span> <span word="than">than</span> 5 <span word="hours">hours</span>.</p><p> <span word="For">For</span> <span word="an">an</span> <span word="engine">engine</span> <span word="to">to</span> <span word="burn">burn</span> <span word="fuel">fuel</span> <span word="and">and</span> <span word="produce">produce</span> <span word="energy">energy</span>，<span word="it">it</span> <span word="needs">needs</span> <span word="oxygen">oxygen</span>.<span word="A">A</span> <span word="jet">jet</span> <span word="engine">engine</span>，<span word="like">like</span> <span word="those">those</span> <span word="on">on</span> <span word="passenger">passenger</span> <span word="airplanes">airplanes</span>，<span word="gets">gets</span> <span word="oxygen">oxygen</span> <span word="from">from</span> <span word="the">the</span> <span word="air">air</span>.<span word="A">A</span> <span word="rocket">rocket</span> <span word="engine">engine</span> <span word="typically">typically</span> <span word="goes">goes</span> <span word="faster">faster</span> <span word="but">but</span> <span word="has">has</span> <span word="to">to</span> <span word="carry">carry</span> <span word="its">its</span> <span word="own">own</span> <span word="supply">supply</span> <span word="of">of</span> <span word="oxygen">oxygen</span>.<span word="A">A</span> <span word="scramjet">scramjet</span> <span word="engine">engine</span> <span word="goes">goes</span> <span word="as">as</span> <span word="fast">fast</span> <span word="as">as</span> <span word="a">a</span> <span word="rocket">rocket</span>，<span word="but">but</span> <span word="it">it</span> <span word="doesnt">doesnt</span> <span word="have">have</span> <span word="to">to</span> <span word="carry">carry</span> <span word="its">its</span> <span word="own">own</span> <span word="oxygen">oxygen</span> <span word="supply">supply</span>.<span word="A">A</span> <span word="scramjets">scramjets</span> <span word="special">special</span> <span word="design">design</span> <span word="allows">allows</span> <span word="it">it</span> <span word="to">to</span> <span word="obtain">obtain</span> <span word="oxygen">oxygen</span> <span word="from">from</span> <span word="the">the</span> <span word="air">air</span> <span word="that">that</span> <span word="flows">flows</span> <span word="through">through</span> <span word="the">the</span> <span word="engine">engine</span>.<span word="And">And</span> <span word="it">it</span> <span word="does">does</span> <span word="so">so</span> <span word="without">without</span> <span word="letting">letting</span> <span word="the">the</span> <span word="fast">fast</span>-<span word="moving">moving</span> <span word="air">air</span> <span word="put">put</span> <span word="out">out</span> <span word="the">the</span> <span word="combustion">combustion</span> <span word="flames">flames</span>. <span word="However">However</span>，<span word="a">a</span> <span word="scramjet">scramjet</span> <span word="engine">engine</span> <span word="works">works</span> <span word="properly">properly</span> <span word="only">only</span> <span word="at">at</span> <span word="speeds">speeds</span> <span word="greater">greater</span> <span word="than">than</span> <span word="five">five</span> <span word="times">times</span> <span word="the">the</span> <span word="speed">speed</span> <span word="of">of</span> <span word="sound">sound</span>.<span word="A">A</span> <span word="booster">booster</span> <span word="rocket">rocket</span> <span word="carried">carried</span> <span word="the">the</span> <span word="Hyper">Hyper</span>-<span word="X">X</span> <span word="to">to</span> <span word="an">an</span> <span word="altitude">altitude</span> <span word="of">of</span> <span word="about">about</span> 100,000 <span word="feet">feet</span> <span word="for">for</span> <span word="its">its</span> <span word="test">test</span> <span word="flight">flight</span>.<span word="The">The</span> <span word="aircrafts">aircrafts</span> <span word="record">record</span>-<span word="beating">beating</span> <span word="flight">flight</span> <span word="lasted">lasted</span> <span word="just">just</span> 11 <span word="seconds">seconds</span>.<span word="Although">Although</span> <span word="the">the</span> <span word="little">little</span> <span word="planes">planes</span> <span word="self">self</span>-<span word="powered">powered</span> <span word="flight">flight</span> <span word="lasted">lasted</span> <span word="only">only</span> 11 <span word="seconds">seconds</span>，<span word="that">that</span> <span word="brief">brief</span> <span word="journey">journey</span> <span word="on">on</span> <span word="March">March</span> 27 <span word="makes">makes</span> <span word="a">a</span> <span word="major">major</span> <span word="milestone">milestone</span> <span word="on">on</span> <span word="the">the</span> <span word="way">way</span> <span word="to">to</span> <span word="a">a</span> <span word="new">new</span> <span word="breed">breed</span> <span word="of">of</span> <span word="very">very</span> <span word="fast">fast</span> <span word="airplanes">airplanes</span>，<span word="comments">comments</span> <span word="Werner">Werner</span> <span word="J">J</span>.<span word="A">A</span>.<span word="Dahm">Dahm</span> <span word="of">of</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Michigan">Michigan</span> <span word="in">in</span> <span word="Ann">Ann</span> <span word="Arbor">Arbor</span>4.<span word="In">In</span> <span word="the">the</span> <span word="future">future</span>，<span word="engineers">engineers</span> <span word="predict">predict</span>，<span word="airplanes">airplanes</span> <span word="equipped">equipped</span> <span word="with">with</span> <span word="scramjet">scramjet</span> <span word="engines">engines</span> <span word="could">could</span> <span word="transport">transport</span> <span word="cargo">cargo</span> <span word="quickly">quickly</span> <span word="and">and</span> <span word="cheaply">cheaply</span> <span word="to">to</span> <span word="the">the</span> <span word="brink">brink</span> <span word="of">of</span> <span word="space">space</span>. <span word="Such">Such</span> <span word="hypersonic">hypersonic</span> <span word="jets">jets</span> <span word="could">could</span> <span word="potentially">potentially</span> <span word="carry">carry</span> <span word="passengers">passengers</span> <span word="anywhere">anywhere</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span> <span word="in">in</span> <span word="just">just</span> <span word="a">a</span> <span word="few">few</span> <span word="hours">hours</span>.</p>
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