2014年职称英语综合类真题精选：阅读理解(5)
<p> <span word="Even">Even</span> <span word="ancient">ancient</span> <span word="Egypts">Egypts</span> <span word="mighty">mighty</span> <span word="pyramidbuilders">pyramidbuilders</span> <span word="were">were</span> <span word="powerless">powerless</span> <span word="in">in</span> <span word="the">the</span> <span word="face">face</span> <span word="of">of</span> <span word="the">the</span> <span word="faminethat">faminethat</span> <span word="helped">helped</span> <span word="bring">bring</span> <span word="down">down</span> <span word="their">their</span> <span word="civilization">civilization</span> <span word="around">around</span> 2180 <span word="B">B</span>.<span word="C">C</span>..<span word="Now">Now</span> <span word="evidence">evidence</span> <span word="collected">collected</span> <span word="from">from</span> <span word="mud">mud</span> <span word="deposited">deposited</span> <span word="by">by</span> <span word="the">the</span> <span word="River">River</span> <span word="Nile">Nile</span> <span word="suggests">suggests</span> <span word="that">that</span> <span word="a">a</span> <span word="shift">shift</span> <span word="in">in</span> <span word="climate">climate</span> <span word="thousands">thousands</span> <span word="of">of</span> <span word="kilometers">kilometers</span> <span word="to">to</span> <span word="the">the</span> <span word="south">south</span> <span word="was">was</span> <span word="ultimately">ultimately</span> <span word="to">to</span> <span word="blame">blame</span>--<span word="and">and</span> <span word="the">the</span> <span word="same">same</span> <span word="or">or</span> <span word="worse">worse</span> <span word="could">could</span> <span word="happen">happen</span> <span word="today">today</span>.</p><p> <span word="The">The</span> <span word="ancient">ancient</span> <span word="Egyptians">Egyptians</span> <span word="depended">depended</span> <span word="on">on</span> <span word="the">the</span> <span word="Niles">Niles</span> <span word="annual">annual</span> <span word="floods">floods</span> <span word="to">to</span> <span word="irrigate">irrigate</span> <span word="their">their</span> <span word="crops">crops</span>.<span word="But">But</span> <span word="any">any</span> <span word="change">change</span> <span word="in">in</span> <span word="climate">climate</span> <span word="that">that</span> <span word="pushed">pushed</span> <span word="the">the</span> <span word="African">African</span> <span word="monsoonssouthwards">monsoonssouthwards</span> <span word="out">out</span> <span word="of">of</span> <span word="Ethiopia">Ethiopia</span> <span word="would">would</span> <span word="have">have</span> <span word="reduced">reduced</span> <span word="these">these</span> <span word="floods">floods</span>.</p><p> <span word="Declining">Declining</span> <span word="rains">rains</span> <span word="in">in</span> <span word="the">the</span> <span word="Ethiopian">Ethiopian</span> <span word="highlands">highlands</span> <span word="would">would</span> <span word="have">have</span> <span word="meant">meant</span> <span word="fewer">fewer</span> <span word="plants">plants</span> <span word="to">to</span> <span word="stabilize">stabilize</span> <span word="the">the</span> <span word="soil">soil</span>.<span word="W">W</span>.1<span word="len">len</span> <span word="rain">rain</span> <span word="did">did</span> <span word="fall">fall</span> <span word="it">it</span> <span word="would">would</span> <span word="have">have</span> <span word="washed">washed</span> <span word="large">large</span> <span word="amounts">amounts</span> <span word="of">of</span> <span word="soil">soil</span> <span word="into">into</span> <span word="the">the</span> <span word="Blue">Blue</span> <span word="Nile">Nile</span> <span word="and">and</span> <span word="into">into</span> <span word="Egypt">Egypt</span>，<span word="along">along</span> <span word="with">with</span> <span word="sedimentfrom">sedimentfrom</span> <span word="the">the</span> <span word="White">White</span> <span word="Nile">Nile</span>.</p><p> <span word="Blue">Blue</span> <span word="Nile">Nile</span> <span word="mud">mud</span> <span word="has">has</span> <span word="a">a</span> <span word="different">different</span> <span word="isotopesignature">isotopesignature</span> <span word="from">from</span> <span word="that">that</span> <span word="of">of</span> <span word="the">the</span> <span word="white">white</span> <span word="Nile">Nile</span>.<span word="So">So</span> <span word="by">by</span> <span word="analyzing">analyzing</span> <span word="isotope">isotope</span> <span word="differences">differences</span> <span word="in">in</span> <span word="mud">mud</span> <span word="deposited">deposited</span> <span word="in">in</span> <span word="the">the</span> <span word="Nile">Nile</span> <span word="Delta">Delta</span>.<span word="Michael">Michael</span> <span word="Krom">Krom</span> <span word="of">of</span> <span word="LeedsUniversity">LeedsUniversity</span> <span word="worked">worked</span> <span word="out">out</span> <span word="what">what</span> <span word="proportion">proportion</span> <span word="of">of</span> <span word="sediment">sediment</span> <span word="came">came</span> <span word="from">from</span> <span word="each">each</span> <span word="branch">branch</span> <span word="of">of</span> <span word="the">the</span> <span word="river">river</span>.</p><p> <span word="Krom">Krom</span> <span word="reasons">reasons</span> <span word="that">that</span> <span word="during">during</span> <span word="periods">periods</span> <span word="of">of</span> <span word="drought">drought</span>，<span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="Blue">Blue</span> <span word="Nile">Nile</span> <span word="mud">mud</span> <span word="in">in</span> <span word="the">the</span> <span word="river">river</span> <span word="would">would</span> <span word="be">be</span> <span word="relatively">relatively</span> <span word="high">high</span>.<span word="He">He</span> <span word="found">found</span> <span word="that">that</span> <span word="one">one</span> <span word="of">of</span> <span word="these">these</span> <span word="periods">periods</span>，<span word="from">from</span> 4500 <span word="to">to</span> 4200 <span word="years">years</span> <span word="ago">ago</span>。<span word="immediately">immediately</span> <span word="came">came</span> <span word="before">before</span> <span word="the">the</span> <span word="fall">fall</span> <span word="of">of</span> <span word="the">the</span> <span word="Egypts">Egypts</span> <span word="old">old</span> <span word="Kingdom">Kingdom</span>.</p><p> <span word="The">The</span> <span word="weakened">weakened</span> <span word="waters">waters</span> <span word="would">would</span> <span word="have">have</span> <span word="been">been</span> <span word="disaster">disaster</span> <span word="for">for</span> <span word="the">the</span> <span word="Egyptians">Egyptians</span>.<span word="Changes">Changes</span> <span word="that">that</span> <span word="affect">affect</span> <span word="food">food</span> <span word="supply">supply</span> <span word="dont">dont</span> <span word="have">have</span> <span word="to">to</span> <span word="be">be</span> <span word="very">very</span> <span word="large">large</span> <span word="to">to</span> <span word="have">have</span> <span word="a">a</span> <span word="rippleeffect">rippleeffect</span> <span word="in">in</span> <span word="societies">societies</span>，<span word="says">says</span> <span word="Bill">Bill</span> <span word="Ryan">Ryan</span> <span word="of">of</span> <span word="the">the</span> <span word="Lamont">Lamont</span> <span word="Doherty">Doherty</span> <span word="Earth">Earth</span> <span word="Observatory">Observatory</span> <span word="in">in</span> <span word="New">New</span> <span word="York">York</span>.</p>
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