高考英语阅读理解专项训练：科技类（附详解）
<p> 高考英语阅读理解专项训练——科技类</p><p> (1)</p><p> <span word="With">With</span> <span word="only">only</span> <span word="about">about</span> 1, 000 <span word="pandas">pandas</span> <span word="left">left</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span>, <span word="China">China</span> <span word="is">is</span> <span word="desperately">desperately</span> <span word="trying">trying</span> <span word="to">to</span> <span word="clone">clone</span>(克隆) <span word="the">the</span> <span word="animal">animal</span> <span word="and">and</span> <span word="save">save</span> <span word="the">the</span> <span word="endangered">endangered</span> <span word="species">species</span>(物种). <span word="That">That</span>’<span word="s">s</span> <span word="a">a</span> <span word="move">move</span> <span word="similar">similar</span> <span word="to">to</span> <span word="what">what</span> <span word="a">a</span> <span word="Texas">Texas</span> <span word="A">A</span> & <span word="M">M</span> <span word="University">University</span> <span word="researchers">researchers</span> <span word="have">have</span> <span word="been">been</span> <span word="undertaking">undertaking</span> <span word="for">for</span> <span word="the">the</span> <span word="past">past</span> <span word="five">five</span> <span word="years">years</span> <span word="in">in</span> <span word="a">a</span> <span word="project">project</span> <span word="called">called</span> “<span word="Noah">Noah</span>’<span word="s">s</span> <span word="Ark">Ark</span>”.</p><p> <span word="Noah">Noah</span>’<span word="s">s</span> <span word="Ark">Ark</span> <span word="is">is</span> <span word="aimed">aimed</span> <span word="at">at</span> <span word="collecting">collecting</span> <span word="eggs">eggs</span>, <span word="embryos">embryos</span>(胚胎), <span word="semen">semen</span> <span word="and">and</span> <span word="DNA">DNA</span> <span word="of">of</span> <span word="endangered">endangered</span> <span word="animals">animals</span> <span word="and">and</span> <span word="storing">storing</span> <span word="them">them</span> <span word="in">in</span> <span word="liquid">liquid</span> <span word="nitrogen">nitrogen</span>. <span word="If">If</span> <span word="certain">certain</span> <span word="species">species</span> <span word="should">should</span> <span word="become">become</span> <span word="extinct">extinct</span>, <span word="Dr">Dr</span>. <span word="Duane">Duane</span> <span word="Kraemer">Kraemer</span>, <span word="a">a</span> <span word="professor">professor</span> <span word="in">in</span> <span word="Texas">Texas</span> <span word="A">A</span> & <span word="M">M</span>’<span word="s">s</span> <span word="College">College</span> <span word="of">of</span> <span word="Veterinary">Veterinary</span> <span word="Medicine">Medicine</span>, <span word="says">says</span> <span word="there">there</span> <span word="would">would</span> <span word="be">be</span> <span word="enough">enough</span> <span word="of">of</span> <span word="the">the</span> <span word="basic">basic</span> <span word="building">building</span> <span word="blocks">blocks</span> <span word="to">to</span> <span word="reintroduce">reintroduce</span> <span word="the">the</span> <span word="species">species</span> <span word="in">in</span> <span word="the">the</span> <span word="future">future</span>.</p><p> <span word="It">It</span> <span word="is">is</span> <span word="estimated">estimated</span> <span word="that">that</span> <span word="as">as</span> <span word="many">many</span> <span word="as">as</span> 2, 000 <span word="species">species</span> <span word="of">of</span> <span word="mammals">mammals</span>, <span word="birds">birds</span> <span word="reptiles">reptiles</span> <span word="will">will</span> <span word="become">become</span> <span word="extinct">extinct</span> <span word="in">in</span> <span word="over">over</span> 100 <span word="years">years</span>. <span word="The">The</span> <span word="panda">panda</span>, <span word="native">native</span> <span word="only">only</span> <span word="to">to</span> <span word="China">China</span>, <span word="is">is</span> <span word="in">in</span> <span word="danger">danger</span> <span word="of">of</span> <span word="becoming">becoming</span> <span word="extinct">extinct</span> <span word="in">in</span> <span word="the">the</span> <span word="next">next</span> 25 <span word="years">years</span>.</p><p> <span word="This">This</span> <span word="week">week</span>, <span word="Chinese">Chinese</span> <span word="scientists">scientists</span> <span word="said">said</span> <span word="they">they</span> <span word="grew">grew</span> <span word="an">an</span> <span word="embryo">embryo</span> <span word="by">by</span> <span word="introducing">introducing</span> <span word="cells">cells</span> <span word="from">from</span> <span word="a">a</span> <span word="dead">dead</span> <span word="female">female</span> <span word="panda">panda</span> <span word="into">into</span> <span word="the">the</span> <span word="egg">egg</span> <span word="cells">cells</span> <span word="of">of</span> <span word="a">a</span> <span word="Japanese">Japanese</span> <span word="white">white</span> <span word="rabbit">rabbit</span>. <span word="They">They</span> <span word="are">are</span> <span word="now">now</span> <span word="trying">trying</span> <span word="to">to</span> <span word="implant">implant</span> <span word="the">the</span> <span word="embryo">embryo</span> <span word="into">into</span> <span word="a">a</span> <span word="host">host</span> <span word="animal">animal</span>.</p><p> <span word="The">The</span> <span word="entire">entire</span> <span word="procedure">procedure</span> <span word="could">could</span> <span word="take">take</span> <span word="from">from</span> <span word="three">three</span> <span word="to">to</span> <span word="five">five</span> <span word="years">years</span> <span word="to">to</span> <span word="complete">complete</span>.</p><p> “<span word="The">The</span> <span word="nuclear">nuclear</span> <span word="transfer">transfer</span>(核子移植) <span word="of">of</span> <span word="one">one</span> <span word="species">species</span> <span word="to">to</span> <span word="another">another</span> <span word="is">is</span> <span word="not">not</span> <span word="easy">easy</span>, <span word="and">and</span> <span word="the">the</span> <span word="lack">lack</span> <span word="of">of</span> <span word="available">available</span>(<span word="capable">capable</span> <span word="of">of</span> <span word="being">being</span> <span word="used">used</span>) <span word="panda">panda</span> <span word="eggs">eggs</span> <span word="could">could</span> <span word="be">be</span> <span word="a">a</span> <span word="major">major</span> <span word="problem">problem</span>,” <span word="Kraemer">Kraemer</span> <span word="believes">believes</span>. “<span word="They">They</span> <span word="will">will</span> <span word="probably">probably</span> <span word="have">have</span> <span word="to">to</span> <span word="do">do</span> <span word="several">several</span> <span word="hundred">hundred</span> <span word="transfers">transfers</span> <span word="to">to</span> <span word="result">result</span> <span word="in">in</span> <span word="one">one</span> <span word="pregnancy">pregnancy</span> (<span word="having">having</span> <span word="a">a</span> <span word="baby">baby</span>). <span word="It">It</span> <span word="takes">takes</span> <span word="a">a</span> <span word="long">long</span> <span word="time">time</span> <span word="and">and</span> <span word="it">it</span>’<span word="s">s</span> <span word="difficult">difficult</span>, <span word="but">but</span> <span word="this">this</span> <span word="could">could</span> <span word="be">be</span> <span word="groundbreaking">groundbreaking</span> <span word="science">science</span> <span word="if">if</span> <span word="it">it</span> <span word="works">works</span>. <span word="They">They</span> <span word="are">are</span> <span word="certainly">certainly</span> <span word="not">not</span> <span word="putting">putting</span> <span word="any">any</span> <span word="live">live</span> <span word="pandas">pandas</span> <span word="at">at</span> <span word="risk">risk</span>, <span word="so">so</span> <span word="it">it</span> <span word="is">is</span> <span word="worth">worth</span> <span word="the">the</span> <span word="effort">effort</span>,” <span word="adds">adds</span> <span word="Kraemer">Kraemer</span>, <span word="who">who</span> <span word="is">is</span> <span word="one">one</span> <span word="of">of</span> <span word="the">the</span> <span word="leaders">leaders</span> <span word="of">of</span> <span word="the">the</span> <span word="Project">Project</span> <span word="at">at</span> <span word="Texas">Texas</span> <span word="A">A</span>& <span word="M">M</span>, <span word="the">the</span> <span word="first">first</span>-<span word="ever">ever</span> <span word="attempt">attempt</span> <span word="at">at</span> <span word="cloning">cloning</span> <span word="a">a</span> <span word="dog">dog</span>.</p>
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