2017届高考英语一轮基础知识复习：Unit 1 Great Scientists（新人教版必修5）
<p> <span word="Unit">Unit</span> 1 <span word="Great">Great</span> <span word="Scientists">Scientists</span></p><p> Ⅰ.阅读理解</p><p> <span word="A">A</span></p><p> (2015·青岛市二模)</p><p> <span word="Scientists">Scientists</span> <span word="investigated">investigated</span> <span word="why">why</span> <span word="Ebola">Ebola</span> <span word="virus">virus</span> <span word="is">is</span> <span word="so">so</span> <span word="deadly">deadly</span> <span word="when">when</span> <span word="it">it</span> <span word="spreads">spreads</span> <span word="from">from</span> <span word="animals">animals</span> <span word="to">to</span> <span word="humans">humans</span> <span word="and">and</span> <span word="then">then</span> <span word="from">from</span> <span word="human">human</span><span word="to">to</span><span word="human">human</span> <span word="contact">contact</span>. <span word="The">The</span> <span word="research">research</span> <span word="team">team</span> <span word="looked">looked</span> <span word="at">at</span> <span word="the">the</span> <span word="Zaire">Zaire</span> <span word="Ebola">Ebola</span> <span word="virus">virus</span> <span word="in">in</span> <span word="an">an</span> <span word="animal">animal</span> <span word="system">system</span> <span word="to">to</span> <span word="understand">understand</span> <span word="how">how</span> <span word="it">it</span> <span word="gains">gains</span> <span word="strength">strength</span>. <span word="This">This</span> <span word="virus">virus</span> <span word="is">is</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="the">the</span> <span word="current">current</span> <span word="outbreak">outbreak</span> <span word="in">in</span> <span word="West">West</span> <span word="Africa">Africa</span>. <span word="They">They</span> <span word="found">found</span> <span word="that">that</span> <span word="initially">initially</span> <span word="the">the</span> <span word="animal">animal</span> <span word="systems">systems</span> <span word="were">were</span> <span word="not">not</span> <span word="affected">affected</span> <span word="by">by</span> <span word="the">the</span> <span word="virus">virus</span>, <span word="but">but</span> <span word="succeeding">succeeding</span> <span word="transmission">transmission</span>(传送) <span word="into">into</span> <span word="other">other</span> <span word="animals">animals</span> <span word="caused">caused</span> <span word="the">the</span> <span word="virus">virus</span> <span word="to">to</span> “<span word="hot">hot</span> <span word="up">up</span>” <span word="and">and</span> <span word="become">become</span> <span word="more">more</span> <span word="severe">severe</span>.</p><p> <span word="The">The</span> <span word="team">team</span> <span word="analyzed">analyzed</span> <span word="the">the</span> <span word="viruses">viruses</span> <span word="at">at</span> <span word="different">different</span> <span word="stages">stages</span> <span word="and">and</span> <span word="were">were</span> <span word="able">able</span> <span word="to">to</span> <span word="identify">identify</span> <span word="several">several</span> <span word="changes">changes</span> <span word="in">in</span> <span word="its">its</span> <span word="genetic">genetic</span> <span word="material">material</span> <span word="that">that</span> <span word="were">were</span> <span word="associated">associated</span> <span word="with">with</span> <span word="increased">increased</span> <span word="disease">disease</span>.</p><p> <span word="Professor">Professor</span> <span word="Julian">Julian</span> <span word="Hiscox">Hiscox</span>, <span word="who">who</span> <span word="led">led</span> <span word="the">the</span> <span word="study">study</span> <span word="from">from</span> <span word="the">the</span> <span word="University">University</span>'<span word="s">s</span> <span word="Institute">Institute</span> <span word="of">of</span> <span word="Infection">Infection</span> <span word="and">and</span> <span word="Global">Global</span> <span word="Health">Health</span>, <span word="explains">explains</span>: “<span word="The">The</span> <span word="work">work</span> <span word="tells">tells</span> <span word="us">us</span> <span word="that">that</span> <span word="the">the</span> <span word="evolutionary">evolutionary</span> <span word="goal">goal</span> <span word="of">of</span> <span word="Ebola">Ebola</span> <span word="virus">virus</span> <span word="is">is</span> <span word="to">to</span> <span word="become">become</span> <span word="more">more</span> <span word="fatal">fatal</span>.”</p><p> “<span word="We">We</span> <span word="were">were</span> <span word="able">able</span> <span word="to">to</span> <span word="show">show</span> <span word="through">through</span> <span word="genetic">genetic</span> <span word="analysis">analysis</span> <span word="which">which</span> <span word="parts">parts</span> <span word="of">of</span> <span word="the">the</span> <span word="virus">virus</span> <span word="are">are</span> <span word="involved">involved</span> <span word="in">in</span> <span word="this">this</span> <span word="process">process</span>. <span word="The">The</span> <span word="information">information</span> <span word="we">we</span> <span word="have">have</span> <span word="gathered">gathered</span> <span word="will">will</span> <span word="now">now</span> <span word="allow">allow</span> <span word="us">us</span> <span word="to">to</span> <span word="monitor">monitor</span> <span word="for">for</span> <span word="such">such</span> <span word="changes">changes</span> <span word="in">in</span> <span word="an">an</span> <span word="outbreak">outbreak</span> <span word="as">as</span> <span word="well">well</span> <span word="as">as</span> <span word="develop">develop</span> <span word="future">future</span> <span word="treatment">treatment</span> <span word="strategies">strategies</span>.”</p><p> <span word="Professor">Professor</span> <span word="Roger">Roger</span> <span word="Hewson">Hewson</span>, <span word="leading">leading</span> <span word="the">the</span> <span word="study">study</span> <span word="from">from</span> <span word="Public">Public</span> <span word="Health">Health</span> <span word="England">England</span>, <span word="Porton">Porton</span> <span word="Down">Down</span>, <span word="said">said</span>: “<span word="Ebola">Ebola</span> <span word="virus">virus</span> <span word="is">is</span> <span word="such">such</span> <span word="a">a</span> <span word="destructive">destructive</span> <span word="infection">infection</span> <span word="to">to</span> <span word="the">the</span> <span word="people">people</span> <span word="affected">affected</span> <span word="by">by</span> <span word="the">the</span> <span word="disease">disease</span> <span word="and">and</span> <span word="the">the</span> <span word="economy">economy</span> <span word="of">of</span> <span word="West">West</span> <span word="Africa">Africa</span>.”</p>
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