2014年职称英语理工类C级阅读理解精华练习(5)
<p> <span word="Hair">Hair</span> <span word="Detectives">Detectives</span></p><p> <span word="Scientists">Scientists</span> <span word="have">have</span> <span word="found">found</span> <span word="a">a</span> <span word="way">way</span> <span word="to">to</span> <span word="use">use</span> <span word="hair">hair</span> <span word="to">to</span> <span word="figure">figure</span> <span word="out">out</span> <span word="where">where</span> <span word="a">a</span> <span word="person">person</span> <span word="is">is</span> <span word="from">from</span> <span word="and">and</span> <span word="where">where</span> <span word="that">that</span> <span word="person">person</span> <span word="has">has</span> <span word="been">been</span>. <span word="The">The</span> <span word="finding">finding</span> <span word="could">could</span> <span word="help">help</span> <span word="solve">solve</span> <span word="crimes">crimes</span>, <span word="among">among</span> <span word="other">other</span> <span word="useful">useful</span> <span word="applications">applications</span>.</p><p> <span word="Water">Water</span> <span word="is">is</span> <span word="central">central</span> <span word="to">to</span> <span word="the">the</span> <span word="new">new</span> <span word="technique">technique</span>. <span word="Our">Our</span> <span word="bodies">bodies</span> <span word="break">break</span> <span word="water">water</span> <span word="down">down</span> <span word="into">into</span> <span word="its">its</span> <span word="parts">parts</span>: <span word="hydrogen">hydrogen</span> <span word="and">and</span> <span word="oxygen">oxygen</span>. <span word="Atoms">Atoms</span> <span word="of">of</span> <span word="these">these</span> <span word="two">two</span> <span word="elements">elements</span> <span word="end">end</span> <span word="up">up</span> <span word="in">in</span> <span word="our">our</span> <span word="tissues">tissues</span> <span word="and">and</span> <span word="hair">hair</span>.</p><p> <span word="But">But</span> <span word="not">not</span> <span word="all">all</span> <span word="water">water</span> <span word="is">is</span> <span word="the">the</span> <span word="same">same</span>. <span word="Hydrogen">Hydrogen</span> <span word="and">and</span> <span word="oxygen">oxygen</span> <span word="atoms">atoms</span> <span word="can">can</span> <span word="vary">vary</span> <span word="in">in</span> <span word="how">how</span> <span word="much">much</span> <span word="they">they</span> <span word="weigh">weigh</span>. <span word="Different">Different</span> <span word="forms">forms</span> <span word="of">of</span> <span word="a">a</span> <span word="single">single</span> <span word="element">element</span> <span word="are">are</span> <span word="called">called</span> <span word="isotopes">isotopes</span>. <span word="And">And</span> <span word="depending">depending</span> <span word="on">on</span> <span word="where">where</span> <span word="you">you</span> <span word="live">live</span>, <span word="tap">tap</span> <span word="water">water</span> <span word="contains">contains</span> <span word="unique">unique</span> <span word="proportions">proportions</span> <span word="of">of</span> <span word="the">the</span> <span word="heavier">heavier</span> <span word="and">and</span> <span word="lighter">lighter</span> <span word="isotopes">isotopes</span> <span word="of">of</span> <span word="hydrogen">hydrogen</span> <span word="and">and</span> <span word="oxygen">oxygen</span>.</p><p> <span word="Might">Might</span> <span word="hair">hair</span> <span word="record">record</span> <span word="these">these</span> <span word="watery">watery</span> <span word="quirks">quirks</span>? <span word="Thats">Thats</span> <span word="what">what</span> <span word="James">James</span> <span word="R">R</span>. <span word="Ehleringer">Ehleringer</span>, <span word="an">an</span> <span word="environmental">environmental</span> <span word="scientist">scientist</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Utah">Utah</span> <span word="in">in</span> <span word="Salt">Salt</span> <span word="Lake">Lake</span> <span word="City">City</span>, <span word="wondered">wondered</span>.</p><p> <span word="To">To</span> <span word="find">find</span> <span word="out">out</span>, <span word="he">he</span> <span word="and">and</span> <span word="his">his</span> <span word="colleagues">colleagues</span> <span word="collected">collected</span> <span word="hair">hair</span> <span word="from">from</span> <span word="barbers">barbers</span> <span word="and">and</span> <span word="hair">hair</span> <span word="stylists">stylists</span> <span word="in">in</span> 65 <span word="cities">cities</span> <span word="in">in</span> 18 <span word="states">states</span> <span word="across">across</span> <span word="the">the</span> <span word="United">United</span> <span word="States">States</span>. <span word="The">The</span> <span word="researchers">researchers</span> <span word="assumed">assumed</span> <span word="that">that</span> <span word="the">the</span> <span word="hair">hair</span> <span word="they">they</span> <span word="collected">collected</span> <span word="came">came</span> <span word="from">from</span> <span word="people">people</span> <span word="who">who</span> <span word="lived">lived</span> <span word="in">in</span> <span word="the">the</span> <span word="area">area</span>.</p><p> <span word="Even">Even</span> <span word="though">though</span> <span word="people">people</span> <span word="drink">drink</span> <span word="a">a</span> <span word="lot">lot</span> <span word="of">of</span> <span word="bottled">bottled</span> <span word="water">water</span> <span word="these">these</span> <span word="days">days</span>, <span word="the">the</span> <span word="scientists">scientists</span> <span word="found">found</span> <span word="that">that</span> <span word="hair">hair</span> <span word="overwhelmingly">overwhelmingly</span> <span word="reflected">reflected</span> <span word="the">the</span> <span word="concentrations">concentrations</span> <span word="of">of</span> <span word="hydrogen">hydrogen</span> <span word="and">and</span> <span word="oxygen">oxygen</span> <span word="isotopes">isotopes</span> <span word="in">in</span> <span word="local">local</span> <span word="tap">tap</span> <span word="water">water</span>. <span word="Thats">Thats</span> <span word="probably">probably</span> <span word="because">because</span> <span word="people">people</span> <span word="usually">usually</span> <span word="cook">cook</span> <span word="their">their</span> <span word="food">food</span> <span word="in">in</span> <span word="the">the</span> <span word="local">local</span> <span word="water">water</span>. <span word="Whats">Whats</span> <span word="more">more</span>, <span word="most">most</span> <span word="of">of</span> <span word="the">the</span> <span word="other">other</span> <span word="liquids">liquids</span> <span word="people">people</span> <span word="drink">drink</span> <span word="including">including</span> <span word="milk">milk</span> <span word="and">and</span> <span word="soft">soft</span> <span word="drinks">drinks</span> <span word="contain">contain</span> <span word="large">large</span> <span word="amounts">amounts</span> <span word="of">of</span> <span word="water">water</span> <span word="that">that</span> <span word="also">also</span> <span word="come">come</span> <span word="from">from</span> <span word="sources">sources</span> <span word="within">within</span> <span word="their">their</span> <span word="region">region</span>.</p>
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