2014年理工类阅读理解新增文章-书中第6篇
<p> 第6篇 <span word="Arctic">Arctic</span> <span word="Melt">Melt</span></p><p> <span word="Earths">Earths</span> <span word="North">North</span> <span word="and">and</span> <span word="South">South</span> <span word="Poles">Poles</span> <span word="are">are</span> <span word="famous">famous</span> <span word="for">for</span> <span word="being">being</span> <span word="cold">cold</span> <span word="and">and</span> <span word="icy">icy</span>. <span word="Last">Last</span> <span word="year">year</span>, <span word="however">however</span>, <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="ice">ice</span> <span word="in">in</span> <span word="the">the</span> <span word="Arctic">Arctic</span> <span word="Ocean">Ocean</span> <span word="fell">fell</span> <span word="to">to</span> <span word="a">a</span> <span word="record">record</span> <span word="low">low</span>1.</p><p> <span word="Normally">Normally</span>, <span word="ice">ice</span> <span word="builds">builds</span> <span word="in">in</span> <span word="Arctic">Arctic</span> <span word="waters">waters</span> <span word="around">around</span> <span word="the">the</span> <span word="North">North</span> <span word="Pole">Pole</span> <span word="each">each</span> <span word="winter">winter</span> <span word="and">and</span> <span word="shrinks">shrinks</span> <span word="during">during</span> <span word="the">the</span> <span word="summer">summer</span>. <span word="But">But</span> <span word="for">for</span> <span word="many">many</span> <span word="years">years</span>, <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="ice">ice</span> <span word="left">left</span> <span word="by">by</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="summer">summer</span> <span word="has">has</span> <span word="been">been</span> <span word="declining">declining</span>.</p><p> <span word="Since">Since</span> 1979, <span word="each">each</span> <span word="decade">decade</span> <span word="has">has</span> <span word="seen">seen</span> <span word="an">an</span> 11.4 <span word="percent">percent</span> <span word="drop">drop</span> <span word="in">in</span> <span word="end">end</span>-<span word="of">of</span>-<span word="summer">summer</span> <span word="ice">ice</span> <span word="cover">cover</span>2. <span word="Between">Between</span> 1981 <span word="and">and</span> 2000, <span word="ice">ice</span> <span word="in">in</span> <span word="the">the</span> <span word="Arctic">Arctic</span> <span word="lost">lost</span> 22 <span word="percent">percent</span> <span word="of">of</span> <span word="its">its</span> <span word="thickness">thickness</span> -- <span word="becoming">becoming</span> 1.13 <span word="meters">meters</span> <span word="thinner">thinner</span>.</p><p> <span word="Last">Last</span> <span word="summer">summer</span>, <span word="Arctic">Arctic</span> <span word="sea">sea</span> <span word="ice">ice</span> <span word="reached">reached</span> <span word="its">its</span> <span word="skimpiest">skimpiest</span> <span word="levels">levels</span> <span word="yet">yet</span>. <span word="By">By</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="summer">summer</span> 2007, <span word="the">the</span> <span word="ice">ice</span> <span word="had">had</span> <span word="shrunk">shrunk</span> <span word="to">to</span> <span word="cover">cover</span> <span word="just">just</span> 4.2 <span word="million">million</span> <span word="square">square</span> <span word="kilometers">kilometers</span>. <span word="Thats">Thats</span> 38 <span word="percent">percent</span> <span word="less">less</span> <span word="area">area</span> <span word="than">than</span> <span word="the">the</span> <span word="average">average</span> <span word="cover">cover</span> <span word="at">at</span> <span word="that">that</span> <span word="time">time</span> <span word="of">of</span> <span word="year">year</span>. <span word="Andits">Andits</span> <span word="a">a</span> <span word="very">very</span> <span word="large">large</span> 23 <span word="percent">percent</span> <span word="below">below</span> <span word="the">the</span> <span word="previous">previous</span> <span word="record">record</span> <span word="low">low</span>, <span word="which">which</span> <span word="was">was</span> <span word="set">set</span> <span word="just">just</span> 2 <span word="years">years</span> <span word="ago">ago</span>. <span word="This">This</span> <span word="continuing">continuing</span> <span word="trend">trend</span> <span word="has">has</span> <span word="scientists">scientists</span> <span word="concerned">concerned</span>.</p><p> <span word="There">There</span> <span word="may">may</span> <span word="be">be</span> <span word="several">several</span> <span word="reasons">reasons</span> <span word="for">for</span> <span word="the">the</span> <span word="ice">ice</span> <span word="melt">melt</span>, <span word="says">says</span> <span word="Jinlun">Jinlun</span> <span word="Zhang">Zhang</span>, <span word="an">an</span> <span word="oceanographer">oceanographer</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Washington">Washington</span>3 <span word="in">in</span> <span word="Seattle">Seattle</span>. <span word="Unusually">Unusually</span> <span word="strong">strong</span> <span word="winds">winds</span> <span word="blew">blew</span> <span word="through">through</span> <span word="the">the</span> <span word="Arctic">Arctic</span> <span word="last">last</span> <span word="summer">summer</span>. <span word="The">The</span> <span word="winds">winds</span> <span word="pushed">pushed</span> <span word="much">much</span> <span word="of">of</span> <span word="the">the</span> <span word="ice">ice</span> <span word="out">out</span> <span word="of">of</span> <span word="the">the</span> <span word="central">central</span> <span word="Arctic">Arctic</span>, <span word="leaving">leaving</span> <span word="a">a</span> <span word="large">large</span> <span word="area">area</span> <span word="of">of</span> <span word="thin">thin</span> <span word="ice">ice</span> <span word="and">and</span> <span word="open">open</span> <span word="water">water</span>4.</p><p> <span word="Scientists">Scientists</span> <span word="also">also</span> <span word="suspect">suspect</span> <span word="that">that</span> <span word="fewer">fewer</span> <span word="clouds">clouds</span> <span word="cover">cover</span> <span word="the">the</span> <span word="Arctic">Arctic</span> <span word="now">now</span> <span word="than">than</span> <span word="in">in</span> <span word="the">the</span> <span word="past">past</span>. <span word="Clearer">Clearer</span> <span word="skies">skies</span> <span word="allow">allow</span> <span word="more">more</span> <span word="sunlight">sunlight</span> <span word="to">to</span> <span word="reach">reach</span> <span word="the">the</span> <span word="ocean">ocean</span>. <span word="The">The</span> <span word="extra">extra</span> <span word="heat">heat</span> <span word="warms">warms</span> <span word="both">both</span> <span word="the">the</span> <span word="water">water</span> <span word="and">and</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>. <span word="In">In</span> <span word="parts">parts</span> <span word="of">of</span> <span word="the">the</span> <span word="Arctic">Arctic</span> <span word="Ocean">Ocean</span> <span word="last">last</span> <span word="year">year</span>, <span word="surface">surface</span> <span word="temperatures">temperatures</span> <span word="were">were</span> 3.5℃<span word="Celsius">Celsius</span> <span word="warmer">warmer</span> <span word="than">than</span> <span word="average">average</span> <span word="and">and</span> 1.5℃ <span word="warmer">warmer</span> <span word="than">than</span> <span word="the">the</span> <span word="previous">previous</span> <span word="record">record</span> <span word="high">high</span>5.</p>
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