2012年12月英语六级阅读全真模拟题与详解解析
<p> 2012年12月英语六级阅读全真模拟题</p><p> <span word="The">The</span> <span word="Hydrogen">Hydrogen</span> <span word="Economy">Economy</span></p><p> <span word="While">While</span> <span word="fossil">fossil</span> <span word="fuels">fuels</span> <span word="have">have</span> <span word="played">played</span> <span word="an">an</span> <span word="important">important</span> <span word="role">role</span> <span word="in">in</span> <span word="getting">getting</span> <span word="society">society</span> <span word="to">to</span> <span word="the">the</span> <span word="point">point</span> <span word="it">it</span> <span word="is">is</span> <span word="at">at</span> <span word="today">today</span>, <span word="there">there</span> <span word="are">are</span> <span word="four">four</span> <span word="big">big</span> <span word="problems">problems</span> <span word="that">that</span> <span word="fossil">fossil</span> <span word="fuels">fuels</span> <span word="create">create</span>.</p><p> <span word="Air">Air</span> <span word="pollution">pollution</span>-<span word="When">When</span> <span word="cars">cars</span> <span word="burn">burn</span> <span word="gasoline">gasoline</span>, <span word="they">they</span> <span word="would">would</span> <span word="ideally">ideally</span> <span word="burn">burn</span> <span word="it">it</span> <span word="perfectly">perfectly</span> <span word="and">and</span> <span word="create">create</span> <span word="nothing">nothing</span> <span word="but">but</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="and">and</span> <span word="water">water</span> <span word="in">in</span> <span word="their">their</span> <span word="exhaust">exhaust</span>. <span word="Unfortunately">Unfortunately</span>, <span word="the">the</span> <span word="internal">internal</span> <span word="combustion">combustion</span>(燃烧)<span word="engine">engine</span> <span word="is">is</span> <span word="not">not</span> <span word="perfect">perfect</span>. <span word="In">In</span> <span word="the">the</span> <span word="process">process</span> <span word="of">of</span> <span word="burning">burning</span> <span word="the">the</span> <span word="gasoline">gasoline</span>, <span word="it">it</span> <span word="also">also</span> <span word="produces">produces</span> <span word="carbon">carbon</span> <span word="monoxide">monoxide</span>, <span word="a">a</span> <span word="poisonous">poisonous</span> <span word="gas">gas</span>; <span word="nitrogen">nitrogen</span> <span word="oxides">oxides</span>, <span word="the">the</span> <span word="main">main</span> <span word="source">source</span> <span word="of">of</span> <span word="urban">urban</span> <span word="smog">smog</span>; <span word="and">and</span> <span word="unburned">unburned</span> <span word="hydrocarbons">hydrocarbons</span>, <span word="the">the</span> <span word="main">main</span> <span word="source">source</span> <span word="of">of</span> <span word="urban">urban</span> <span word="ozone">ozone</span> .</p><p> <span word="Catalytic">Catalytic</span> <span word="converters">converters</span> (催化式排气净化器) <span word="eliminate">eliminate</span> <span word="much">much</span> <span word="of">of</span> <span word="this">this</span> <span word="pollution">pollution</span>, <span word="but">but</span> <span word="they">they</span> <span word="arent">arent</span> <span word="perfect">perfect</span>. <span word="Air">Air</span> <span word="pollution">pollution</span> <span word="from">from</span> <span word="cars">cars</span> <span word="and">and</span> <span word="power">power</span> <span word="plants">plants</span> <span word="is">is</span> <span word="a">a</span> <span word="real">real</span> <span word="problem">problem</span> <span word="in">in</span> <span word="big">big</span> <span word="cities">cities</span>.</p><p> <span word="It">It</span> <span word="is">is</span> <span word="bad">bad</span> <span word="enough">enough</span> <span word="now">now</span> <span word="that">that</span>, <span word="in">in</span> <span word="the">the</span> <span word="summer">summer</span>, <span word="many">many</span> <span word="cities">cities</span> <span word="have">have</span> <span word="dangerous">dangerous</span> <span word="levels">levels</span> <span word="of">of</span> <span word="ozone">ozone</span> <span word="in">in</span> <span word="the">the</span> <span word="air">air</span>.</p><p> <span word="Environmental">Environmental</span> <span word="pollution">pollution</span>-<span word="The">The</span> <span word="process">process</span> <span word="of">of</span> <span word="transporting">transporting</span> <span word="and">and</span> <span word="storing">storing</span> <span word="oil">oil</span> <span word="has">has</span> <span word="a">a</span> <span word="big">big</span> <span word="impact">impact</span> <span word="on">on</span> <span word="the">the</span> <span word="environment">environment</span> <span word="whenever">whenever</span> <span word="something">something</span> <span word="goes">goes</span> <span word="wrong">wrong</span>. <span word="An">An</span> <span word="oil">oil</span> <span word="spill">spill</span>, <span word="pipeline">pipeline</span> <span word="explosion">explosion</span> <span word="or">or</span> <span word="well">well</span> <span word="fire">fire</span> <span word="can">can</span> <span word="create">create</span> <span word="a">a</span> <span word="huge">huge</span> <span word="mess">mess</span>.</p><p> <span word="Global">Global</span> <span word="warming">warming</span>-<span word="When">When</span> <span word="you">you</span> <span word="burn">burn</span> <span word="a">a</span> <span word="gallon">gallon</span> <span word="of">of</span> <span word="gas">gas</span> <span word="in">in</span> <span word="your">your</span> <span word="car">car</span>, <span word="you">you</span> <span word="emit">emit</span> <span word="about">about</span> 5 <span word="pounds">pounds</span> (2.3 <span word="kg">kg</span>) <span word="of">of</span> <span word="carbon">carbon</span> <span word="into">into</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>. <span word="If">If</span> <span word="it">it</span> <span word="were">were</span> <span word="solid">solid</span> <span word="carbon">carbon</span>, <span word="it">it</span> <span word="would">would</span> <span word="be">be</span> <span word="extremely">extremely</span> <span word="noticeable">noticeable</span>-<span word="it">it</span> <span word="would">would</span> <span word="be">be</span> <span word="like">like</span> <span word="throwing">throwing</span> <span word="a">a</span> 5-<span word="pound">pound</span> <span word="bag">bag</span> <span word="of">of</span> <span word="sugar">sugar</span> <span word="out">out</span> <span word="the">the</span> <span word="window">window</span> <span word="of">of</span> <span word="your">your</span> <span word="car">car</span> <span word="for">for</span> <span word="every">every</span> <span word="gallon">gallon</span> <span word="of">of</span> <span word="gas">gas</span> <span word="burned">burned</span>. <span word="But">But</span> <span word="because">because</span> <span word="the">the</span> 5 <span word="pounds">pounds</span> <span word="of">of</span> <span word="carbon">carbon</span> <span word="comes">comes</span> <span word="out">out</span> <span word="as">as</span> <span word="an">an</span> <span word="invisible">invisible</span> <span word="gas">gas</span>, <span word="carbon">carbon</span> <span word="dioxide">dioxide</span>, <span word="most">most</span> <span word="of">of</span> <span word="us">us</span> <span word="are">are</span> <span word="oblivious">oblivious</span> (不注意的)<span word="to">to</span> <span word="it">it</span>. <span word="The">The</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="coming">coming</span> <span word="out">out</span> <span word="of">of</span> <span word="every">every</span> <span word="cars">cars</span> <span word="tailpipe">tailpipe</span> <span word="is">is</span> <span word="a">a</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="that">that</span> <span word="is">is</span> <span word="slowly">slowly</span> <span word="raising">raising</span> <span word="the">the</span> <span word="temperature">temperature</span> <span word="of">of</span> <span word="the">the</span> <span word="planet">planet</span>. <span word="The">The</span> <span word="ultimate">ultimate</span> <span word="effects">effects</span> <span word="are">are</span> <span word="unknown">unknown</span>, <span word="but">but</span> <span word="it">it</span> <span word="is">is</span> <span word="a">a</span> <span word="strong">strong</span> <span word="possibility">possibility</span> <span word="that">that</span>, <span word="eventually">eventually</span>, <span word="there">there</span> <span word="will">will</span> <span word="be">be</span> <span word="dramatic">dramatic</span> <span word="climate">climate</span> <span word="changes">changes</span> <span word="that">that</span> <span word="affect">affect</span> <span word="everyone">everyone</span> <span word="on">on</span> <span word="the">the</span> <span word="planet">planet</span>. <span word="For">For</span> <span word="example">example</span>, <span word="if">if</span> <span word="the">the</span> <span word="ice">ice</span> <span word="caps">caps</span> <span word="melt">melt</span>, <span word="sea">sea</span> <span word="level">level</span> <span word="will">will</span> <span word="rise">rise</span> <span word="significantly">significantly</span>, <span word="flooding">flooding</span> <span word="and">and</span> <span word="destroying">destroying</span> <span word="all">all</span> <span word="coastal">coastal</span> <span word="cities">cities</span> <span word="in">in</span> <span word="existence">existence</span> <span word="today">today</span>. <span word="Thats">Thats</span> <span word="a">a</span> <span word="big">big</span> <span word="side">side</span> <span word="effect">effect</span>.</p>
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