2009职称英语真题理工类B级真题：阅读理解
<p> 导语：以下英语网为大家整理了全面的职称英语考试历年真题及答案解析，《职称英语考试试题汇总：历年真题及答案解析》供大家参考学习。更多职称英语考试试题敬请关注英语网！</p><p>【推荐】关注英语网微信：<span word="yingyuwang">yingyuwang</span>2013，更快获取真题答案及成绩查询信息。</p><p> 第4部分：阅读理解（第31～45题，每题3分，共45分）</p><p> 下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。</p><p> 第一篇</p><p> <span word="Water">Water</span></p><p> <span word="The">The</span> <span word="second">second</span> <span word="most">most</span> <span word="important">important</span> <span word="constituent">constituent</span> （构成成份） <span word="of">of</span> <span word="the">the</span> <span word="biosphere">biosphere</span> （生物圈） <span word="is">is</span> <span word="liquid">liquid</span> <span word="water">water</span>. <span word="This">This</span> <span word="can">can</span> <span word="only">only</span> <span word="exist">exist</span> <span word="in">in</span> <span word="a">a</span> <span word="very">very</span> <span word="narrow">narrow</span> <span word="range">range</span> <span word="of">of</span> <span word="temperatures">temperatures</span>， <span word="since">since</span> <span word="water">water</span> <span word="freezes">freezes</span> <span word="at">at</span> 0℃ <span word="and">and</span> <span word="boils">boils</span> <span word="at">at</span> 100℃。 <span word="Life">Life</span> <span word="as">as</span> <span word="we">we</span> <span word="know">know</span> <span word="it">it</span> <span word="would">would</span> <span word="only">only</span> <span word="be">be</span> <span word="possible">possible</span> <span word="on">on</span> <span word="the">the</span> <span word="surface">surface</span> <span word="of">of</span> <span word="a">a</span> <span word="planet">planet</span> <span word="which">which</span> <span word="had">had</span> <span word="temperatures">temperatures</span> <span word="somewhere">somewhere</span> <span word="within">within</span> <span word="this">this</span> <span word="narrow">narrow</span> <span word="range">range</span>.</p><p> <span word="The">The</span> <span word="earths">earths</span> <span word="supply">supply</span> <span word="of">of</span> <span word="water">water</span> <span word="probably">probably</span> <span word="remains">remains</span> <span word="fairly">fairly</span> <span word="constant">constant</span> <span word="in">in</span> <span word="quantity">quantity</span>. <span word="The">The</span> <span word="total">total</span> <span word="quantity">quantity</span> <span word="of">of</span> <span word="water">water</span> <span word="is">is</span> <span word="not">not</span> <span word="known">known</span> <span word="very">very</span> <span word="accurately">accurately</span>， <span word="but">but</span> <span word="it">it</span> <span word="is">is</span> <span word="about">about</span> <span word="enough">enough</span> <span word="to">to</span> <span word="cover">cover</span> <span word="the">the</span> <span word="surface">surface</span> <span word="of">of</span> <span word="the">the</span> <span word="globe">globe</span> <span word="to">to</span> <span word="a">a</span> <span word="depth">depth</span> <span word="of">of</span> <span word="about">about</span> <span word="two">two</span> <span word="and">and</span> <span word="three">three</span>-<span word="quarter">quarter</span> <span word="kilometers">kilometers</span>. <span word="Most">Most</span> <span word="of">of</span> <span word="it">it</span> <span word="is">is</span> <span word="in">in</span> <span word="the">the</span> <span word="form">form</span> <span word="of">of</span> <span word="the">the</span> <span word="salt">salt</span> <span word="water">water</span> <span word="of">of</span> <span word="the">the</span> <span word="oceans">oceans</span> - <span word="about">about</span> 97 <span word="per">per</span> <span word="cent">cent</span>. <span word="The">The</span> <span word="rest">rest</span></p><p> <span word="is">is</span> <span word="fresh">fresh</span>， <span word="but">but</span> <span word="three">three</span>-<span word="quarters">quarters</span> <span word="of">of</span> <span word="this">this</span> <span word="is">is</span> <span word="in">in</span> <span word="the">the</span> <span word="form">form</span> <span word="of">of</span> <span word="ice">ice</span> <span word="at">at</span> <span word="the">the</span> <span word="Poles">Poles</span> <span word="and">and</span> <span word="on">on</span> <span word="mountains">mountains</span>， <span word="and">and</span> <span word="cannot">cannot</span> <span word="be">be</span> <span word="used">used</span> <span word="by">by</span> <span word="living">living</span> <span word="systems">systems</span> <span word="until">until</span> <span word="melted">melted</span>. <span word="Of">Of</span> <span word="the">the</span> <span word="remaining">remaining</span> <span word="fractional">fractional</span> <span word="which">which</span> <span word="is">is</span> <span word="somewhat">somewhat</span> <span word="less">less</span> <span word="than">than</span> <span word="one">one</span> <span word="per">per</span> <span word="cent">cent</span> <span word="of">of</span> <span word="the">the</span> <span word="whole">whole</span>， <span word="there">there</span> <span word="is">is</span> 10-20 <span word="times">times</span> <span word="as">as</span> <span word="much">much</span> <span word="stored">stored</span> <span word="underground">underground</span> <span word="water">water</span> <span word="as">as</span> <span word="there">there</span> <span word="is">is</span> <span word="actually">actually</span> <span word="on">on</span> <span word="the">the</span> <span word="surface">surface</span>. <span word="There">There</span> <span word="is">is</span> <span word="also">also</span> <span word="a">a</span> <span word="tiny">tiny</span>， <span word="but">but</span> <span word="extremely">extremely</span> <span word="important">important</span> <span word="fraction">fraction</span> <span word="of">of</span> <span word="the">the</span> <span word="water">water</span> <span word="supply">supply</span> <span word="which">which</span> <span word="is">is</span> <span word="present">present</span> <span word="as">as</span> <span word="water">water</span> <span word="vapor">vapor</span> <span word="in">in</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>.</p>
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