大学英语六级考试拓展阅读-背诵美文52
<p> <span word="The">The</span> <span word="most">most</span> <span word="striking">striking</span> <span word="single">single</span> <span word="fact">fact</span> <span word="about">about</span> <span word="chimpanzees">chimpanzees</span> <span word="is">is</span> <span word="the">the</span> <span word="flexibility">flexibility</span> <span word="of">of</span> <span word="their">their</span> <span word="social">social</span> <span word="life">life</span>, <span word="the">the</span> <span word="lack">lack</span> <span word="of">of</span> <span word="any">any</span> <span word="rigid">rigid</span> <span word="form">form</span> <span word="of">of</span> <span word="organization">organization</span>. <span word="It">It</span> <span word="represents">represents</span> <span word="about">about</span> <span word="as">as</span> <span word="far">far</span> <span word="a">a</span> <span word="departure">departure</span> <span word="from">from</span> <span word="the">the</span> <span word="baboon">baboon</span> <span word="type">type</span> <span word="of">of</span> <span word="organization">organization</span> <span word="as">as</span> <span word="one">one</span> <span word="can">can</span> <span word="find">find</span> <span word="among">among</span> <span word="the">the</span> <span word="higher">higher</span> <span word="primates">primates</span>, <span word="and">and</span> <span word="serves">serves</span> <span word="to">to</span> <span word="emphasize">emphasize</span> <span word="the">the</span> <span word="great">great</span> <span word="variety">variety</span> <span word="of">of</span> <span word="primate">primate</span> <span word="adaptations">adaptations</span>. <span word="Chimpanzees">Chimpanzees</span> <span word="are">are</span> <span word="more">more</span> <span word="human">human</span> <span word="than">than</span> <span word="baboons">baboons</span>, <span word="or">or</span> <span word="rather">rather</span> <span word="they">they</span> <span word="jibe">jibe</span> <span word="better">better</span> <span word="with">with</span> <span word="the">the</span> <span word="way">way</span> <span word="we">we</span> <span word="like">like</span> <span word="to">to</span> <span word="picture">picture</span> <span word="ourselves">ourselves</span>, <span word="as">as</span> <span word="free">free</span>-<span word="wheeling">wheeling</span> <span word="individuals">individuals</span> <span word="who">who</span> <span word="tend">tend</span> <span word="to">to</span> <span word="be">be</span> <span word="unpredictable">unpredictable</span>, <span word="do">do</span> <span word="not">not</span> <span word="take">take</span> <span word="readily">readily</span> <span word="to">to</span> <span word="any">any</span> <span word="form">form</span> <span word="of">of</span> <span word="regimentation">regimentation</span>, <span word="and">and</span> <span word="are">are</span> <span word="frequently">frequently</span> <span word="charming">charming</span>. <span word="Two">Two</span> <span word="researchers">researchers</span> <span word="have">have</span> <span word="described">described</span> <span word="what">what</span> <span word="they">they</span> <span word="found">found</span> <span word="during">during</span> <span word="more">more</span> <span word="than">than</span> <span word="eight">eight</span> <span word="months">months</span> <span word="spent">spent</span> <span word="among">among</span> <span word="chimpanzees">chimpanzees</span> <span word="in">in</span> <span word="their">their</span> <span word="natural">natural</span> <span word="habitat">habitat</span> <span word="the">the</span> <span word="forest">forest</span>:<span word="We">We</span> <span word="were">were</span> <span word="quite">quite</span> <span word="surprised">surprised</span> <span word="to">to</span> <span word="observe">observe</span> <span word="that">that</span> <span word="there">there</span> <span word="is">is</span> <span word="no">no</span> <span word="single">single</span> <span word="distinct">distinct</span> <span word="social">social</span> <span word="unit">unit</span> <span word="in">in</span> <span word="chimpanzee">chimpanzee</span> <span word="society">society</span>. <span word="Not">Not</span> <span word="only">only</span> <span word="is">is</span> <span word="there">there</span> <span word="no">no</span> <span word="family">family</span> <span word="or">or</span> <span word="harem">harem</span> <span word="organization">organization</span>; <span word="neither">neither</span> <span word="is">is</span> <span word="there">there</span> <span word="a">a</span> <span word="troop">troop</span> <span word="organization">organization</span> - <span word="that">that</span> <span word="is">is</span> <span word="to">to</span> <span word="say">say</span>, <span word="no">no</span> <span word="particular">particular</span> <span word="chimpanzees">chimpanzees</span> <span word="keep">keep</span> <span word="permanently">permanently</span> <span word="together">together</span>. <span word="On">On</span> <span word="the">the</span> <span word="contrary">contrary</span>, <span word="individuals">individuals</span> <span word="move">move</span> <span word="about">about</span> <span word="at">at</span> <span word="will">will</span>, <span word="alone">alone</span> <span word="or">or</span> <span word="in">in</span> <span word="small">small</span> <span word="groups">groups</span> <span word="best">best</span> <span word="described">described</span> <span word="as">as</span> <span word="bands">bands</span>, <span word="which">which</span> <span word="sometimes">sometimes</span> <span word="form">form</span> <span word="into">into</span> <span word="large">large</span> <span word="aggregations">aggregations</span>. <span word="They">They</span> <span word="leave">leave</span> <span word="their">their</span> <span word="associates">associates</span> <span word="if">if</span> <span word="they">they</span> <span word="want">want</span> <span word="to">to</span>, <span word="and">and</span> <span word="join">join</span> <span word="up">up</span> <span word="with">with</span> <span word="new">new</span> <span word="ones">ones</span> <span word="without">without</span> <span word="conflict">conflict</span>.<span word="The">The</span> <span word="general">general</span> <span word="practice">practice</span> <span word="is">is</span> <span word="best">best</span> <span word="described">described</span> <span word="as">as</span> <span word="easy">easy</span> <span word="come">come</span>, <span word="easy">easy</span> <span word="go">go</span>, <span word="although">although</span> <span word="there">there</span> <span word="are">are</span> <span word="certain">certain</span> <span word="group">group</span>-<span word="forming">forming</span> <span word="tendencies">tendencies</span>. <span word="As">As</span> <span word="a">a</span> <span word="rule">rule</span> <span word="chimpanzees">chimpanzees</span> <span word="move">move</span> <span word="about">about</span> <span word="in">in</span> <span word="one">one</span> <span word="of">of</span> <span word="four">four</span> <span word="types">types</span> <span word="of">of</span> <span word="band">band</span>: <span word="adult">adult</span> <span word="males">males</span> <span word="only">only</span>; <span word="mothers">mothers</span> <span word="and">and</span> <span word="offspring">offspring</span> <span word="and">and</span> <span word="occasionally">occasionally</span> <span word="a">a</span> <span word="few">few</span> <span word="other">other</span> <span word="females">females</span>; <span word="adults">adults</span> <span word="and">and</span> <span word="adolescents">adolescents</span> <span word="of">of</span> <span word="both">both</span> <span word="sexes">sexes</span>, <span word="but">but</span> <span word="no">no</span> <span word="mothers">mothers</span> <span word="with">with</span> <span word="young">young</span> <span word="and">and</span> <span word="representatives">representatives</span> <span word="of">of</span> <span word="all">all</span> <span word="categories">categories</span> <span word="mixed">mixed</span> <span word="together">together</span>. <span word="The">The</span> <span word="composition">composition</span> <span word="of">of</span> <span word="bands">bands</span> <span word="may">may</span> <span word="change">change</span> <span word="a">a</span> <span word="number">number</span> <span word="of">of</span> <span word="times">times</span> <span word="during">during</span> <span word="the">the</span> <span word="course">course</span> <span word="of">of</span> <span word="a">a</span> <span word="day">day</span> <span word="as">as</span> <span word="individuals">individuals</span> <span word="wander">wander</span> <span word="off">off</span> <span word="and">and</span> <span word="groups">groups</span> <span word="split">split</span> <span word="or">or</span> <span word="combine">combine</span> <span word="with">with</span> <span word="other">other</span> <span word="groups">groups</span>. <span word="On">On</span> <span word="the">the</span> <span word="other">other</span> <span word="hand">hand</span>, <span word="certain">certain</span> <span word="individuals">individuals</span> <span word="prefer">prefer</span> <span word="one">one</span> <span word="anothers">anothers</span> <span word="company">company</span>. <span word="One">One</span> <span word="of">of</span> <span word="the">the</span> <span word="researchers">researchers</span> <span word="observed">observed</span> <span word="that">that</span> <span word="four">four</span> <span word="males">males</span> <span word="often">often</span> <span word="roamed">roamed</span> <span word="together">together</span> <span word="over">over</span> <span word="a">a</span> <span word="four">four</span>-<span word="month">month</span> <span word="period">period</span>, <span word="and">and</span> <span word="mothers">mothers</span> <span word="often">often</span> <span word="associated">associated</span> <span word="with">with</span> <span word="their">their</span> <span word="older">older</span> <span word="offsprings">offsprings</span>.</p>
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