2011年最新六级阅读理解模拟练习（58）
<p> 58</p><p> <span word="We">We</span> <span word="all">all</span> <span word="know">know</span> <span word="that">that</span> <span word="the">the</span> <span word="normal">normal</span> <span word="human">human</span> <span word="daily">daily</span> <span word="cycle">cycle</span> <span word="of">of</span> <span word="activity">activity</span> <span word="is">is</span> <span word="of">of</span> <span word="some">some</span> 7-8 <span word="hours">hours</span> <span word="sleep">sleep</span> <span word="alternation">alternation</span> <span word="with">with</span> <span word="some">some</span> 16-17 <span word="hourswakefulness">hourswakefulness</span> <span word="and">and</span> <span word="that">that</span>, <span word="broadly">broadly</span> <span word="speaking">speaking</span>, <span word="the">the</span> <span word="sleep">sleep</span> <span word="normally">normally</span> <span word="coincides">coincides</span> <span word="with">with</span> <span word="the">the</span> <span word="hours">hours</span> <span word="of">of</span> <span word="darkness">darkness</span>. <span word="Our">Our</span> <span word="present">present</span> <span word="concern">concern</span> <span word="is">is</span> <span word="with">with</span> <span word="how">how</span> <span word="easily">easily</span> <span word="and">and</span> <span word="to">to</span> <span word="what">what</span> <span word="extent">extent</span> <span word="this">this</span> <span word="cycle">cycle</span> <span word="can">can</span> <span word="be">be</span> <span word="modified">modified</span>.</p><p> <span word="The">The</span> <span word="question">question</span> <span word="is">is</span> <span word="no">no</span> <span word="mere">mere</span> <span word="academic">academic</span> <span word="one">one</span>. <span word="The">The</span> <span word="ease">ease</span>, <span word="for">for</span> <span word="example">example</span>, <span word="with">with</span> <span word="which">which</span> <span word="people">people</span> <span word="can">can</span> <span word="change">change</span> <span word="from">from</span> <span word="working">working</span> <span word="in">in</span> <span word="the">the</span> <span word="day">day</span> <span word="to">to</span> <span word="working">working</span> <span word="at">at</span> <span word="night">night</span> <span word="is">is</span> <span word="a">a</span> <span word="question">question</span> <span word="of">of</span> <span word="growing">growing</span> <span word="importance">importance</span> <span word="in">in</span> <span word="industry">industry</span> <span word="where">where</span> <span word="automation">automation</span> <span word="calls">calls</span> <span word="for">for</span> <span word="round">round</span>-<span word="the">the</span>-<span word="clock">clock</span> <span word="working">working</span> <span word="of">of</span> <span word="machines">machines</span>. <span word="It">It</span> <span word="normally">normally</span> <span word="takes">takes</span> <span word="from">from</span> <span word="five">five</span> <span word="days">days</span> <span word="to">to</span> <span word="one">one</span> <span word="week">week</span> <span word="for">for</span> <span word="a">a</span> <span word="person">person</span> <span word="to">to</span> <span word="adapt">adapt</span> <span word="to">to</span> <span word="a">a</span> <span word="reversed">reversed</span> <span word="routine">routine</span> <span word="of">of</span> <span word="sleep">sleep</span> <span word="and">and</span> <span word="wakefulness">wakefulness</span>, <span word="sleeping">sleeping</span> <span word="during">during</span> <span word="the">the</span> <span word="day">day</span> <span word="and">and</span> <span word="working">working</span> <span word="at">at</span> <span word="night">night</span>. <span word="Unfortunately">Unfortunately</span>, <span word="it">it</span> <span word="is">is</span> <span word="often">often</span> <span word="the">the</span> <span word="case">case</span> <span word="in">in</span> <span word="industry">industry</span> <span word="that">that</span> <span word="shifts">shifts</span> <span word="are">are</span> <span word="changed">changed</span> <span word="every">every</span> <span word="week">week</span>; <span word="a">a</span> <span word="person">person</span> <span word="may">may</span> <span word="work">work</span> <span word="from">from</span> 12:00 <span word="midnight">midnight</span> <span word="to">to</span> 8:00 <span word="a">a</span>.<span word="m">m</span>. <span word="one">one</span> <span word="week">week</span>, 8:00 <span word="a">a</span>.<span word="m">m</span>. <span word="to">to</span> 4:00 <span word="p">p</span>.<span word="m">m</span>. <span word="the">the</span> <span word="next">next</span>, <span word="and">and</span> 4:00<span word="p">p</span>.<span word="m">m</span>. <span word="to">to</span> 12:00 <span word="midnight">midnight</span> <span word="the">the</span> <span word="third">third</span> <span word="and">and</span> <span word="so">so</span> <span word="on">on</span>. <span word="This">This</span> <span word="means">means</span> <span word="that">that</span> <span word="no">no</span> <span word="sooner">sooner</span> <span word="has">has</span> <span word="he">he</span> <span word="got">got</span> <span word="used">used</span> <span word="to">to</span> <span word="one">one</span> <span word="routine">routine</span> <span word="than">than</span> <span word="he">he</span> <span word="has">has</span> <span word="to">to</span> <span word="change">change</span> <span word="to">to</span> <span word="another">another</span>, <span word="so">so</span> <span word="that">that</span> <span word="much">much</span> <span word="of">of</span> <span word="his">his</span> <span word="time">time</span> <span word="is">is</span> <span word="spent">spent</span> <span word="neither">neither</span> <span word="working">working</span> <span word="nor">nor</span> <span word="sleeping">sleeping</span> <span word="very">very</span> <span word="efficiently">efficiently</span>.</p><p> <span word="The">The</span> <span word="only">only</span> <span word="real">real</span> <span word="solution">solution</span> <span word="appears">appears</span> <span word="to">to</span> <span word="be">be</span> <span word="to">to</span> <span word="hand">hand</span> <span word="over">over</span> <span word="the">the</span> <span word="night">night</span> <span word="shift">shift</span> <span word="to">to</span> <span word="a">a</span> <span word="number">number</span> <span word="of">of</span> <span word="permanent">permanent</span> <span word="night">night</span> <span word="workers">workers</span>. <span word="An">An</span> <span word="interesting">interesting</span> <span word="study">study</span> <span word="of">of</span> <span word="the">the</span> <span word="domestic">domestic</span> <span word="life">life</span> <span word="and">and</span> <span word="health">health</span> <span word="of">of</span> <span word="night">night</span>-<span word="shift">shift</span> <span word="workers">workers</span> <span word="was">was</span> <span word="carried">carried</span> <span word="out">out</span> <span word="by">by</span> <span word="Brown">Brown</span> <span word="in">in</span> 1957. <span word="She">She</span> <span word="found">found</span> <span word="a">a</span> <span word="high">high</span> <span word="incidence">incidence</span> <span word="of">of</span> <span word="disturbed">disturbed</span> <span word="sleep">sleep</span> <span word="and">and</span> <span word="other">other</span> <span word="disorders">disorders</span> <span word="among">among</span> <span word="those">those</span> <span word="on">on</span> <span word="alternating">alternating</span> <span word="day">day</span> <span word="and">and</span> <span word="night">night</span> <span word="shifts">shifts</span>, <span word="but">but</span> <span word="no">no</span> <span word="abnormal">abnormal</span> <span word="occurrence">occurrence</span> <span word="of">of</span> <span word="these">these</span> <span word="phenomena">phenomena</span> <span word="among">among</span> <span word="those">those</span> <span word="on">on</span> <span word="permanent">permanent</span> <span word="night">night</span> <span word="work">work</span>.</p>
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