2014年1英语六级新题型长篇阅读最后一个月冲刺练习（6）
<p> <span word="Passage">Passage</span> <span word="Two">Two</span></p><p> <span word="Words">Words</span>: 1,103</p><p> <span word="How">How</span> <span word="Ozone">Ozone</span> <span word="Pollution">Pollution</span> <span word="Works">Works</span></p><p> <span word="A">A</span>) <span word="The">The</span> <span word="weather">weather</span> <span word="report">report</span> <span word="on">on</span> <span word="the">the</span> <span word="radio">radio</span> <span word="or">or</span> <span word="TV">TV</span> <span word="tells">tells</span> <span word="you">you</span> <span word="that">that</span> <span word="it">it</span> <span word="is">is</span> <span word="going">going</span> <span word="to">to</span> <span word="be">be</span> <span word="sunny">sunny</span> <span word="and">and</span> <span word="hot">hot</span> <span word="and">and</span> <span word="that">that</span> <span word="an">an</span> <span word="orange">orange</span> <span word="ozone">ozone</span> <span word="alert">alert</span> <span word="has">has</span> <span word="been">been</span> <span word="issued">issued</span>. <span word="What">What</span> <span word="is">is</span> <span word="ozone">ozone</span>? <span word="What">What</span> <span word="does">does</span> <span word="an">an</span> <span word="orange">orange</span> <span word="alert">alert</span> <span word="mean">mean</span>? <span word="Why">Why</span> <span word="should">should</span> <span word="you">you</span> <span word="be">be</span> <span word="concerned">concerned</span> <span word="about">about</span> <span word="it">it</span>? <span word="In">In</span> <span word="this">this</span> <span word="article">article</span>, <span word="we">we</span> <span word="will">will</span> <span word="examine">examine</span> <span word="what">what</span> <span word="ozone">ozone</span> <span word="is">is</span>, <span word="how">how</span> <span word="it">it</span> <span word="is">is</span> <span word="produced">produced</span>, <span word="what">what</span> <span word="health">health</span> <span word="hazards">hazards</span> <span word="it">it</span> <span word="poses">poses</span> <span word="and">and</span> <span word="what">what</span> <span word="you">you</span> <span word="can">can</span> <span word="do">do</span> <span word="to">to</span> <span word="reduce">reduce</span> <span word="ozone">ozone</span> <span word="pollution">pollution</span>.</p><p> <span word="B">B</span>) <span word="Ozone">Ozone</span> <span word="is">is</span> <span word="a">a</span> <span word="molecule">molecule</span> <span word="of">of</span> <span word="three">three</span> <span word="oxygen">oxygen</span> <span word="atoms">atoms</span> <span word="bound">bound</span> <span word="together">together</span> . <span word="It">It</span> <span word="is">is</span> <span word="unstable">unstable</span> <span word="and">and</span> <span word="highly">highly</span> <span word="reactive">reactive</span>. <span word="Ozone">Ozone</span> <span word="is">is</span> <span word="used">used</span> <span word="as">as</span> <span word="a">a</span> <span word="bleach">bleach</span>, <span word="a">a</span> <span word="deodorizing">deodorizing</span> <span word="agent">agent</span>, <span word="and">and</span> <span word="a">a</span> <span word="sterilization">sterilization</span> <span word="agent">agent</span> <span word="for">for</span> <span word="air">air</span> <span word="and">and</span> <span word="drinking">drinking</span> <span word="water">water</span>. <span word="At">At</span> <span word="low">low</span> <span word="concentrations">concentrations</span>, <span word="it">it</span> <span word="is">is</span> <span word="toxic">toxic</span>. <span word="Ozone">Ozone</span> <span word="is">is</span> <span word="found">found</span> <span word="naturally">naturally</span> <span word="in">in</span> <span word="small">small</span> <span word="concentrations">concentrations</span> <span word="in">in</span> <span word="the">the</span> <span word="stratosphere">stratosphere</span>, <span word="a">a</span> <span word="layer">layer</span> <span word="of">of</span> <span word="Earths">Earths</span> <span word="upper">upper</span> <span word="atmosphere">atmosphere</span>. <span word="In">In</span> <span word="this">this</span> <span word="upper">upper</span> <span word="atmosphere">atmosphere</span>, <span word="ozone">ozone</span> <span word="is">is</span> <span word="made">made</span> <span word="when">when</span> <span word="ultraviolet">ultraviolet</span> <span word="light">light</span> <span word="from">from</span> <span word="the">the</span> <span word="sun">sun</span> <span word="splits">splits</span> <span word="an">an</span> <span word="oxygen">oxygen</span> <span word="molecule">molecule</span> , <span word="forming">forming</span> <span word="two">two</span> <span word="single">single</span> <span word="oxygen">oxygen</span> <span word="atoms">atoms</span>. <span word="If">If</span> <span word="a">a</span> <span word="freed">freed</span> <span word="atom">atom</span> <span word="collides">collides</span> <span word="with">with</span> <span word="an">an</span> <span word="oxygen">oxygen</span> <span word="molecule">molecule</span>, <span word="it">it</span> <span word="becomes">becomes</span> <span word="ozone">ozone</span>. <span word="Stratospheric">Stratospheric</span> <span word="ozone">ozone</span> <span word="has">has</span> <span word="been">been</span> <span word="called">called</span> <span word="good">good</span> <span word="ozone">ozone</span> <span word="because">because</span> <span word="it">it</span> <span word="protects">protects</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="surface">surface</span> <span word="from">from</span> <span word="dangerous">dangerous</span> <span word="ultraviolet">ultraviolet</span> <span word="light">light</span>.</p><p> <span word="C">C</span>) <span word="Ozone">Ozone</span> <span word="can">can</span> <span word="also">also</span> <span word="be">be</span> <span word="found">found</span> <span word="in">in</span> <span word="the">the</span> <span word="troposphere">troposphere</span>, <span word="the">the</span> <span word="lowest">lowest</span> <span word="layer">layer</span> <span word="of">of</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>. <span word="Tropospheric">Tropospheric</span> <span word="ozone">ozone</span> <span word="is">is</span> <span word="man">man</span> - <span word="made">made</span>, <span word="a">a</span> <span word="result">result</span> <span word="of">of</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="from">from</span> <span word="internal">internal</span> <span word="combustion">combustion</span> <span word="engines">engines</span> <span word="and">and</span> <span word="power">power</span> <span word="plants">plants</span>. <span word="Automobile">Automobile</span> <span word="exhaust">exhaust</span> <span word="and">and</span> <span word="industrial">industrial</span> <span word="emissions">emissions</span> <span word="release">release</span> <span word="a">a</span> <span word="family">family</span> <span word="of">of</span> <span word="nitrogen">nitrogen</span> <span word="oxide">oxide</span> <span word="gases">gases</span> <span word="and">and</span> <span word="volatile">volatile</span> <span word="organic">organic</span> <span word="compounds">compounds</span> , <span word="by">by</span>-<span word="products">products</span> <span word="of">of</span> <span word="burning">burning</span> <span word="gasoline">gasoline</span> <span word="and">and</span> <span word="coal">coal</span>. <span word="NOx">NOx</span> <span word="and">and</span> <span word="VOC">VOC</span> <span word="combine">combine</span> <span word="chemically">chemically</span> <span word="with">with</span> <span word="oxygen">oxygen</span> <span word="to">to</span> <span word="form">form</span> <span word="ozone">ozone</span> <span word="during">during</span> <span word="sunny">sunny</span>, <span word="high">high</span>- <span word="temperature">temperature</span> <span word="conditions">conditions</span> <span word="of">of</span> <span word="late">late</span> <span word="spring">spring</span>, <span word="summer">summer</span> <span word="and">and</span> <span word="early">early</span> <span word="fall">fall</span>. <span word="High">High</span> <span word="levels">levels</span> <span word="of">of</span> <span word="ozone">ozone</span> <span word="are">are</span> <span word="usually">usually</span> <span word="formed">formed</span> <span word="in">in</span> <span word="the">the</span> <span word="heat">heat</span> <span word="of">of</span> <span word="the">the</span> <span word="afternoon">afternoon</span> <span word="and">and</span> <span word="early">early</span> <span word="evening">evening</span>, <span word="dissipating">dissipating</span> <span word="during">during</span> <span word="the">the</span> <span word="cooler">cooler</span> <span word="nights">nights</span>.</p>
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