GRE阅读高频机经原文及答案：云和气候变化预测
<p> 15. 云和气候变化预测 1996年04月北美 <span word="D">D</span>9604</p><p> <span word="As">As</span> <span word="of">of</span> <span word="the">the</span> <span word="late">late</span> 1980<span word="s">s</span>, <span word="neither">neither</span> <span word="theorists">theorists</span> <span word="nor">nor</span> <span word="large">large</span>-<span word="scale">scale</span> <span word="computer">computer</span> <span word="climate">climate</span> <span word="models">models</span> <span word="could">could</span> <span word="accurately">accurately</span> <span word="predict">predict</span> <span word="whether">whether</span> <span word="cloud">cloud</span> <span word="systems">systems</span> <span word="would">would</span> <span word="help">help</span> <span word="or">or</span> <span word="hurt">hurt</span> <span word="a">a</span> <span word="warming">warming</span> <span word="globe">globe</span>. <span word="Some">Some</span> <span word="studies">studies</span> <span word="suggested">suggested</span> <span word="that">that</span> <span word="a">a</span> <span word="four">four</span> <span word="percent">percent</span> <span word="increase">increase</span> <span word="in">in</span> <span word="stratocumulus">stratocumulus</span> <span word="clouds">clouds</span> <span word="over">over</span> <span word="the">the</span> <span word="ocean">ocean</span> <span word="could">could</span> <span word="compensate">compensate</span> <span word="for">for</span> <span word="a">a</span> <span word="doubling">doubling</span> <span word="in">in</span> <span word="atmospheric">atmospheric</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span>, <span word="preventing">preventing</span> <span word="a">a</span> <span word="potentially">potentially</span> <span word="disastrous">disastrous</span> <span word="planetwide">planetwide</span> <span word="temperature">temperature</span> <span word="increase">increase</span>. <span word="On">On</span> <span word="the">the</span> <span word="other">other</span> <span word="hand">hand</span>, <span word="an">an</span> <span word="increase">increase</span> <span word="in">in</span> <span word="cirrus">cirrus</span> <span word="clouds">clouds</span> <span word="could">could</span> <span word="increase">increase</span> <span word="global">global</span> <span word="warming">warming</span>.</p><p> <span word="That">That</span> <span word="clouds">clouds</span> <span word="represented">represented</span> <span word="the">the</span> <span word="weakest">weakest</span> <span word="element">element</span> <span word="in">in</span> <span word="climate">climate</span> <span word="models">models</span> <span word="was">was</span> <span word="illustrated">illustrated</span> <span word="by">by</span> <span word="a">a</span> <span word="study">study</span> <span word="of">of</span> <span word="fourteen">fourteen</span> <span word="such">such</span> <span word="models">models</span>. <span word="Comparing">Comparing</span> <span word="climate">climate</span> <span word="forecasts">forecasts</span> <span word="for">for</span> <span word="a">a</span> <span word="world">world</span> <span word="with">with</span> <span word="double">double</span> <span word="the">the</span> <span word="current">current</span> <span word="amount">amount</span> <span word="of">of</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span>, <span word="researchers">researchers</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="models">models</span> <span word="agreed">agreed</span> <span word="quite">quite</span> <span word="well">well</span> <span word="if">if</span> <span word="clouds">clouds</span> <span word="were">were</span> <span word="not">not</span> <span word="included">included</span>. <span word="But">But</span> <span word="when">when</span> <span word="clouds">clouds</span> <span word="were">were</span> <span word="incorporated">incorporated</span>, <span word="a">a</span> <span word="wide">wide</span> <span word="range">range</span> <span word="of">of</span> <span word="forecasts">forecasts</span> <span word="was">was</span> <span word="produced">produced</span>. <span word="With">With</span> <span word="such">such</span> <span word="discrepancies">discrepancies</span> <span word="plaguing">plaguing</span> <span word="the">the</span> <span word="models">models</span>, <span word="scientists">scientists</span> <span word="could">could</span> <span word="not">not</span> <span word="easily">easily</span> <span word="predict">predict</span> <span word="how">how</span> <span word="quickly">quickly</span> <span word="the">the</span> <span word="worlds">worlds</span> <span word="climate">climate</span> <span word="would">would</span> <span word="change">change</span>, <span word="nor">nor</span> <span word="could">could</span> <span word="they">they</span> <span word="tell">tell</span> <span word="which">which</span> <span word="regions">regions</span> <span word="would">would</span> <span word="face">face</span> <span word="dustier">dustier</span> <span word="droughts">droughts</span> <span word="or">or</span> <span word="deadlier">deadlier</span> <span word="monsoons">monsoons</span>.</p><p> 15.1. <span word="The">The</span> <span word="author">author</span> <span word="of">of</span> <span word="the">the</span> <span word="passage">passage</span> <span word="is">is</span> <span word="primarily">primarily</span> <span word="concerned">concerned</span> <span word="with">with</span></p><p> <span word="confirming">confirming</span> <span word="a">a</span> <span word="theory">theory</span></p><p> <span word="supporting">supporting</span> <span word="a">a</span> <span word="statement">statement</span></p><p> <span word="presenting">presenting</span> <span word="new">new</span> <span word="information">information</span></p><p> <span word="predicting">predicting</span> <span word="future">future</span> <span word="discoveries">discoveries</span></p><p> <span word="reconciling">reconciling</span> <span word="discrepant">discrepant</span> <span word="findings">findings</span></p><p> 15.2. <span word="It">It</span> <span word="can">can</span> <span word="be">be</span> <span word="inferred">inferred</span> <span word="that">that</span> <span word="one">one</span> <span word="reason">reason</span> <span word="the">the</span> <span word="fourteen">fourteen</span> <span word="models">models</span> <span word="described">described</span> <span word="in">in</span> <span word="the">the</span> <span word="passage">passage</span> <span word="failed">failed</span> <span word="to">to</span> <span word="agree">agree</span> <span word="was">was</span> <span word="that">that</span></p>
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