大学英语六级仔细阅读练习题2
<p> <span word="Passage">Passage</span> <span word="One">One</span></p><p> <span word="Questions">Questions</span> 56 <span word="to">to</span> 60 <span word="are">are</span> <span word="based">based</span> <span word="on">on</span> <span word="the">the</span> <span word="following">following</span> <span word="passage">passage</span>.</p><p> <span word="University">University</span> <span word="of">of</span> <span word="York">York</span> <span word="biologist">biologist</span> <span word="Peter">Peter</span> <span word="Mayhew">Mayhew</span> <span word="recently">recently</span> <span word="found">found</span> <span word="that">that</span> <span word="global">global</span> <span word="warming">warming</span> <span word="might">might</span> <span word="actually">actually</span> <span word="increase">increase</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="species">species</span> <span word="on">on</span> <span word="the">the</span> <span word="planet">planet</span>，<span word="contrary">contrary</span> <span word="to">to</span> <span word="a">a</span> <span word="previous">previous</span> <span word="report">report</span> <span word="that">that</span> <span word="higher">higher</span> <span word="temperatures">temperatures</span> <span word="meant">meant</span> <span word="fewer">fewer</span> <span word="life">life</span> <span word="formsa">formsa</span> <span word="report">report</span> <span word="mat">mat</span> <span word="was">was</span> <span word="his">his</span> <span word="own">own</span>.</p><p> <span word="In">In</span> <span word="Mayhews">Mayhews</span> <span word="initial">initial</span> 2008 <span word="study">study</span>，<span word="low">low</span> <span word="biodiversity">biodiversity</span> <span word="among">among</span> <span word="marine">marine</span> <span word="invertebrates">invertebrates</span>(无脊椎动物)<span word="appeared">appeared</span> <span word="to">to</span> <span word="coincide">coincide</span> <span word="with">with</span> <span word="warmer">warmer</span> <span word="temperatures">temperatures</span> <span word="on">on</span> <span word="Earth">Earth</span> <span word="over">over</span> <span word="the">the</span> <span word="last">last</span> 520 <span word="million">million</span> <span word="years">years</span>. <span word="But">But</span> <span word="Mayhew">Mayhew</span> <span word="and">and</span> <span word="his">his</span> <span word="colleagues">colleagues</span> <span word="decided">decided</span> <span word="to">to</span> <span word="reexamine">reexamine</span> <span word="their">their</span> <span word="hypothesis">hypothesis</span>，<span word="this">this</span> <span word="time">time</span> <span word="using">using</span> <span word="data">data</span> <span word="that">that</span> <span word="werea">werea</span> <span word="fairer">fairer</span> <span word="sample">sample</span> <span word="of">of</span> <span word="the">the</span> <span word="history">history</span> <span word="of">of</span> <span word="life">life</span>.砌<span word="this">this</span> <span word="new">new</span> <span word="collection">collection</span> <span word="of">of</span> <span word="material">material</span>.<span word="they">they</span> <span word="found">found</span> <span word="a">a</span> <span word="complete">complete</span> <span word="reversal">reversal</span> <span word="of">of</span> <span word="the">the</span> <span word="relationship">relationship</span> <span word="between">between</span> <span word="species">species</span> <span word="richness">richness</span> <span word="and">and</span> <span word="temperature">temperature</span> <span word="from">from</span> <span word="what">what</span> <span word="their">their</span> <span word="previous">previous</span> <span word="paper">paper</span> <span word="argued">argued</span>：<span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="different">different</span> <span word="groups">groups</span> <span word="present">present</span> <span word="in">in</span> <span word="the">the</span> <span word="fossil">fossil</span> <span word="record">record</span> <span word="was">was</span> <span word="higher">higher</span>，<span word="rather">rather</span> <span word="than">than</span> <span word="lower">lower</span>，<span word="durin">durin</span>9<span word="greenhouse">greenhouse</span> <span word="phases">phases</span>.</p><p> <span word="Their">Their</span> <span word="previous">previous</span> <span word="findings">findings</span> <span word="rested">rested</span> <span word="on">on</span> <span word="an">an</span> <span word="assumption">assumption</span> <span word="that">that</span> <span word="fossil">fossil</span> <span word="records">records</span> <span word="can">can</span> <span word="be">be</span> <span word="taken">taken</span> <span word="to">to</span> <span word="represent">represent</span> <span word="biodiversity">biodiversity</span> <span word="changes">changes</span> <span word="throughout">throughout</span> <span word="history">history</span>.<span word="Thisnt">Thisnt</span> <span word="necessarily">necessarily</span> <span word="the">the</span> <span word="case">case</span>.<span word="because">because</span> <span word="there">there</span> <span word="are">are</span> <span word="certain">certain</span> <span word="periods">periods</span> <span word="with">with</span> <span word="higher">higher</span>.<span word="quality">quality</span> <span word="fossil">fossil</span> <span word="samples">samples</span>.<span word="and">and</span> <span word="some">some</span> <span word="that">that</span> <span word="are">are</span> <span word="much">much</span> <span word="more">more</span> <span word="difficult">difficult</span> <span word="to">to</span> <span word="sample">sample</span> <span word="well">well</span>.<span word="Aware">Aware</span> <span word="of">of</span> <span word="this">this</span> <span word="bias">bias</span>.<span word="Mayhews">Mayhews</span> <span word="team">team</span> <span word="used">used</span> <span word="data">data</span> <span word="that">that</span> <span word="standardized">standardized</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="fossils">fossils</span> <span word="examined">examined</span> <span word="throughout">throughout</span> <span word="history">history</span> <span word="and">and</span> <span word="accounted">accounted</span> <span word="for">for</span> <span word="other">other</span> <span word="variables">variables</span> <span word="like">like</span> <span word="sea">sea</span> <span word="level">level</span> <span word="changes">changes</span> <span word="that">that</span> <span word="might">might</span> <span word="influence">influence</span> <span word="biodiversity">biodiversity</span> <span word="in">in</span> <span word="their">their</span> <span word="new">new</span> <span word="study">study</span> <span word="to">to</span> <span word="see">see</span> <span word="if">if</span> <span word="their">their</span> <span word="old">old</span> <span word="results">results</span> <span word="would">would</span> <span word="hold">hold</span> <span word="up">up</span>.</p>
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