2015年职称英语理工类考试阅读判断经典练习题(3)
<p> <span word="Greenhouse">Greenhouse</span> <span word="Effect">Effect</span></p><p> <span word="A">A</span> <span word="greenhouse">greenhouse</span> <span word="is">is</span> <span word="a">a</span> <span word="building">building</span> <span word="made">made</span> <span word="of">of</span> <span word="glass">glass</span> <span word="which">which</span> <span word="is">is</span> <span word="used">used</span> <span word="for">for</span> <span word="keeping">keeping</span> <span word="plants">plants</span> <span word="warm">warm</span> <span word="when">when</span> <span word="the">the</span> <span word="outside">outside</span> <span word="temperature">temperature</span> <span word="is">is</span> <span word="low">low</span>. <span word="In">In</span> <span word="a">a</span> <span word="similar">similar</span> <span word="way">way</span>， <span word="there">there</span> <span word="are">are</span> <span word="several">several</span> <span word="gases">gases</span> <span word="in">in</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span> <span word="which">which</span> <span word="trap">trap</span> <span word="the">the</span> <span word="heat">heat</span> <span word="generated">generated</span> <span word="by">by</span> <span word="the">the</span> <span word="sun">sun</span> <span word="and">and</span> <span word="prevent">prevent</span> <span word="it">it</span> <span word="from">from</span> <span word="escaping">escaping</span>. <span word="These">These</span> <span word="gases">gases</span> <span word="are">are</span> <span word="known">known</span> <span word="as">as</span> <span word="greenhouse">greenhouse</span> <span word="gases">gases</span>， <span word="and">and</span> <span word="the">the</span> <span word="way">way</span> <span word="in">in</span> <span word="which">which</span> <span word="they">they</span> <span word="trap">trap</span> <span word="heat">heat</span> <span word="in">in</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span> <span word="is">is</span> <span word="called">called</span> <span word="the">the</span> <span word="greenhouse">greenhouse</span> <span word="effect">effect</span>. <span word="This">This</span> <span word="is">is</span> <span word="not">not</span> <span word="simply">simply</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="like">like</span> <span word="photochemical">photochemical</span> <span word="smog">smog</span> ， <span word="for">for</span> <span word="example">example</span>. <span word="Most">Most</span> <span word="of">of</span> <span word="the">the</span> <span word="main">main</span> <span word="greenhouse">greenhouse</span> <span word="gases">gases</span> <span word="occur">occur</span> <span word="naturally">naturally</span> <span word="in">in</span> <span word="small">small</span> <span word="amounts">amounts</span> <span word="in">in</span> <span word="our">our</span> <span word="atmosphere">atmosphere</span>， <span word="and">and</span> <span word="without">without</span> <span word="them">them</span> <span word="the">the</span> <span word="earth">earth</span> <span word="would">would</span> <span word="be">be</span> <span word="thirty">thirty</span> <span word="degrees">degrees</span> <span word="colder">colder</span> <span word="and">and</span> <span word="human">human</span> <span word="life">life</span> <span word="would">would</span> <span word="not">not</span> <span word="exist">exist</span>. <span word="In">In</span> <span word="other">other</span> <span word="words">words</span>， <span word="the">the</span> <span word="greenhouse">greenhouse</span> <span word="effect">effect</span> <span word="is">is</span> <span word="a">a</span> <span word="natural">natural</span> <span word="process">process</span> <span word="which">which</span> <span word="is">is</span> <span word="to">to</span> <span word="some">some</span> <span word="extent">extent</span> <span word="beneficial">beneficial</span> <span word="to">to</span> <span word="us">us</span>.</p><p> <span word="The">The</span> <span word="problem">problem</span> <span word="is">is</span> <span word="that">that</span> <span word="in">in</span> <span word="the">the</span> <span word="last">last</span> <span word="century">century</span> <span word="and">and</span> <span word="a">a</span> <span word="half">half</span>， <span word="we">we</span> <span word="have">have</span> <span word="been">been</span> <span word="putting">putting</span> <span word="excessive">excessive</span> <span word="amounts">amounts</span> <span word="of">of</span> <span word="these">these</span> <span word="gases">gases</span> <span word="into">into</span> <span word="the">the</span> <span word="earths">earths</span> <span word="atmosphere">atmosphere</span> <span word="by">by</span> <span word="burning">burning</span> <span word="large">large</span> <span word="quantities">quantities</span> <span word="of">of</span> <span word="coal">coal</span> <span word="and">and</span> <span word="oil">oil</span> <span word="and">and</span> <span word="by">by</span> <span word="cutting">cutting</span> <span word="down">down</span> <span word="forests">forests</span>. <span word="In">In</span> 1850， <span word="there">there</span> <span word="were">were</span> 280 <span word="parts">parts</span> <span word="per">per</span> <span word="million">million</span> <span word="of">of</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="in">in</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>. <span word="Now">Now</span> <span word="there">there</span> <span word="are">are</span> 360， <span word="and">and</span> <span word="this">this</span> <span word="figure">figure</span> <span word="is">is</span> <span word="expected">expected</span> <span word="to">to</span> <span word="rise">rise</span> <span word="to">to</span> 460 <span word="by">by</span> <span word="the">the</span> <span word="year">year</span> 2030. <span word="We">We</span> <span word="now">now</span> <span word="put">put</span> 24 <span word="billion">billion</span> <span word="metric">metric</span> <span word="tons">tons</span> <span word="of">of</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="into">into</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span> <span word="every">every</span> <span word="year">year</span>. <span word="We">We</span> <span word="have">have</span> <span word="also">also</span> <span word="created">created</span> <span word="a">a</span> <span word="group">group</span> <span word="of">of</span> <span word="artificial">artificial</span> <span word="greenhouse">greenhouse</span> <span word="gases">gases</span> <span word="that">that</span> <span word="are">are</span> 20，000 <span word="times">times</span> <span word="more">more</span> <span word="effective">effective</span> <span word="than">than</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="in">in</span> <span word="trapping">trapping</span> <span word="heat">heat</span> <span word="in">in</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>. <span word="These">These</span> <span word="are">are</span> <span word="the">the</span> <span word="chlorofluorocarbon">chlorofluorocarbon</span> <span word="gases">gases</span>， <span word="which">which</span> <span word="are">are</span> <span word="used">used</span> <span word="in">in</span> <span word="refrigerators">refrigerators</span> <span word="and">and</span> <span word="air">air</span> <span word="conditioning">conditioning</span> <span word="systems">systems</span>.</p>
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