2013年6月六级真题阅读理解Section B原文+答案解析
<p> 2013年6月英语六级真题阅读理解<span word="Section">Section</span> <span word="B">B</span>原文+答案解析</p><p> <span word="Section">Section</span> <span word="B">B</span></p><p> <span word="Directions">Directions</span>: <span word="There">There</span> <span word="are">are</span> 2 <span word="passages">passages</span> <span word="in">in</span> <span word="this">this</span> <span word="section">section</span>. <span word="Each">Each</span> <span word="passage">passage</span> <span word="is">is</span> <span word="followed">followed</span> <span word="by">by</span> <span word="some">some</span> <span word="questions">questions</span> <span word="or">or</span> <span word="unfinished">unfinished</span> <span word="statements">statements</span>. <span word="For">For</span> <span word="each">each</span> <span word="of">of</span> <span word="them">them</span> <span word="there">there</span> <span word="are">are</span> <span word="four">four</span> <span word="choices">choices</span> <span word="marked">marked</span> <span word="A">A</span>), <span word="B">B</span>), <span word="C">C</span>) <span word="and">and</span> <span word="D">D</span>). <span word="You">You</span> <span word="should">should</span> <span word="decide">decide</span> <span word="on">on</span> <span word="the">the</span> <span word="best">best</span> <span word="choice">choice</span> <span word="and">and</span> <span word="mark">mark</span> <span word="the">the</span> <span word="corresponding">corresponding</span> <span word="letter">letter</span> <span word="on">on</span> <span word="Sheet">Sheet</span> 2 <span word="with">with</span> <span word="a">a</span> <span word="single">single</span> <span word="line">line</span> <span word="through">through</span> <span word="the">the</span> <span word="center">center</span>.</p><p> <span word="Passage">Passage</span> <span word="Two">Two</span></p><p> <span word="Usually">Usually</span> <span word="when">when</span> <span word="we">we</span> <span word="walk">walk</span> <span word="through">through</span> <span word="the">the</span> <span word="rain">rain</span> <span word="forest">forest</span> <span word="we">we</span> <span word="hear">hear</span> <span word="a">a</span> <span word="soft">soft</span> <span word="sound">sound</span> <span word="from">from</span> <span word="all">all</span> <span word="the">the</span> <span word="moist">moist</span> <span word="leaves">leaves</span> <span word="and">and</span> <span word="organic">organic</span> <span word="debris">debris</span> <span word="on">on</span> <span word="the">the</span> <span word="forest">forest</span> <span word="floor">floor</span>, <span word="says">says</span> <span word="ecologist">ecologist</span> <span word="Daniel">Daniel</span> <span word="Nepstad">Nepstad</span>. <span word="Now">Now</span> <span word="we">we</span> <span word="increasingly">increasingly</span> <span word="get">get</span> <span word="rustle">rustle</span> <span word="and">and</span> <span word="crunch">crunch</span>. <span word="Thats">Thats</span> <span word="the">the</span> <span word="sound">sound</span> <span word="of">of</span> <span word="a">a</span> <span word="dying">dying</span> <span word="forest">forest</span>.</p><p> <span word="Predictions">Predictions</span> <span word="of">of</span> <span word="the">the</span> <span word="collapse">collapse</span> <span word="of">of</span> <span word="the">the</span> <span word="tropical">tropical</span> <span word="rain">rain</span> <span word="forests">forests</span> <span word="have">have</span> <span word="been">been</span> <span word="around">around</span> <span word="for">for</span> <span word="years">years</span>. <span word="Yet">Yet</span> <span word="until">until</span> <span word="recently">recently</span> <span word="the">the</span> <span word="worst">worst</span> <span word="forecasts">forecasts</span> <span word="were">were</span> <span word="almost">almost</span> <span word="exclusively">exclusively</span> <span word="linked">linked</span> <span word="to">to</span> <span word="direct">direct</span> <span word="human">human</span> <span word="activity">activity</span>, <span word="such">such</span> <span word="as">as</span> <span word="clear">clear</span>- <span word="cutting">cutting</span> <span word="and">and</span> <span word="burning">burning</span> <span word="for">for</span> <span word="pastures">pastures</span> <span word="or">or</span> <span word="farms">farms</span>. <span word="Left">Left</span> <span word="alone">alone</span>, <span word="it">it</span> <span word="was">was</span> <span word="assumed">assumed</span>, <span word="the">the</span> <span word="worlds">worlds</span> <span word="rain">rain</span> <span word="forests">forests</span> <span word="would">would</span> <span word="not">not</span> <span word="only">only</span> <span word="flourish">flourish</span> <span word="but">but</span> <span word="might">might</span> <span word="even">even</span> <span word="rescue">rescue</span> <span word="us">us</span> <span word="from">from</span> <span word="disaster">disaster</span> <span word="by">by</span> <span word="absorbing">absorbing</span> <span word="the">the</span> <span word="excess">excess</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="and">and</span> <span word="other">other</span> <span word="planet">planet</span>-<span word="warming">warming</span> <span word="greenhouse">greenhouse</span> <span word="gases">gases</span>. <span word="Now">Now</span> <span word="it">it</span> <span word="turns">turns</span> <span word="out">out</span> <span word="that">that</span> <span word="may">may</span> <span word="be">be</span> <span word="wishful">wishful</span> <span word="thinking">thinking</span>. <span word="Some">Some</span> <span word="scientists">scientists</span> <span word="believe">believe</span> <span word="that">that</span> <span word="the">the</span> <span word="rise">rise</span> <span word="in">in</span> <span word="carbon">carbon</span> <span word="levels">levels</span> <span word="means">means</span> <span word="that">that</span> <span word="the">the</span> <span word="Amazon">Amazon</span> <span word="and">and</span> <span word="other">other</span> <span word="rain">rain</span> <span word="forests">forests</span> <span word="in">in</span> <span word="Asia">Asia</span> <span word="and">and</span> <span word="Africa">Africa</span> <span word="may">may</span> <span word="go">go</span> <span word="from">from</span> <span word="being">being</span> <span word="assets">assets</span> <span word="in">in</span> <span word="the">the</span> <span word="battle">battle</span> <span word="against">against</span> <span word="rising">rising</span> <span word="temperatures">temperatures</span> <span word="to">to</span> <span word="liabilities">liabilities</span>. <span word="Amazon">Amazon</span> <span word="plants">plants</span>, <span word="for">for</span> <span word="instance">instance</span>, <span word="hold">hold</span> <span word="more">more</span> <span word="than">than</span> 100 <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="equal">equal</span> <span word="to">to</span> 15-<span word="years">years</span> <span word="of">of</span> <span word="tailpipe">tailpipe</span> <span word="and">and</span> <span word="chimney">chimney</span> <span word="emissions">emissions</span>. <span word="If">If</span> <span word="the">the</span> <span word="collapse">collapse</span> <span word="of">of</span> <span word="the">the</span> <span word="rain">rain</span> <span word="forests">forests</span> <span word="speeds">speeds</span> <span word="up">up</span> <span word="dramatically">dramatically</span>, <span word="it">it</span> <span word="could">could</span> <span word="eventually">eventually</span> <span word="release">release</span> 3.5-5 <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="into">into</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span> <span word="each">each</span> <span word="year">year</span> <span word="making">making</span> <span word="forests">forests</span> <span word="the">the</span> <span word="leading">leading</span> <span word="source">source</span>, <span word="of">of</span> <span word="greenhouse">greenhouse</span> <span word="gases">gases</span>.</p>
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