GRE阅读理解模拟试题练习（2）
<p>考试吧整理“<span word="GRE">GRE</span>阅读理解模拟试题练习”更多<span word="GRE">GRE</span>阅读考试复习指导等，请访问考试吧<span word="GRE">GRE</span>考试网！ </p><p> 8.<span word="People">People</span> <span word="whose">whose</span> <span word="bodies">bodies</span> <span word="cannot">cannot</span> <span word="produce">produce</span> <span word="the">the</span> <span word="substance">substance</span> <span word="cytochrome">cytochrome</span> <span word="P">P</span>450 <span word="are">are</span> <span word="three">three</span> <span word="times">times</span> <span word="as">as</span> <span word="likely">likely</span> <span word="to">to</span> <span word="develop">develop</span> <span word="Parkinson">Parkinson</span>\'<span word="s">s</span> <span word="disease">disease</span>, <span word="a">a</span> <span word="disease">disease</span> <span word="that">that</span> <span word="affects">affects</span> <span word="the">the</span> <span word="brain">brain</span>,<span word="as">as</span> <span word="are">are</span> <span word="people">people</span> <span word="whose">whose</span> <span word="bodies">bodies</span> <span word="do">do</span> <span word="produce">produce</span> <span word="this">this</span> <span word="substance">substance</span>.<span word="Since">Since</span> <span word="cytochrome">cytochrome</span> <span word="P">P</span>450 <span word="protects">protects</span> <span word="the">the</span> <span word="brain">brain</span> <span word="from">from</span> <span word="toxic">toxic</span> <span word="chemicals">chemicals</span>, <span word="toxic">toxic</span> <span word="chemicals">chemicals</span> <span word="probably">probably</span> <span word="play">play</span> <span word="a">a</span> <span word="role">role</span> <span word="in">in</span> <span word="the">the</span> <span word="development">development</span> <span word="of">of</span> <span word="Parkinson">Parkinson</span>\'<span word="s">s</span> <span word="disease">disease</span>.</p><p> <span word="Which">Which</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span>, <span word="if">if</span> <span word="true">true</span>, <span word="most">most</span> <span word="strongly">strongly</span> <span word="supports">supports</span> <span word="the">the</span> <span word="argument">argument</span>?</p><p> (<span word="A">A</span>)<span word="It">It</span> <span word="will">will</span> <span word="soon">soon</span> <span word="be">be</span> <span word="possible">possible</span> <span word="for">for</span> <span word="cytochrome">cytochrome</span> <span word="P">P</span>450 <span word="to">to</span> <span word="be">be</span> <span word="synthesized">synthesized</span> <span word="for">for</span> <span word="the">the</span> <span word="treatment">treatment</span> <span word="of">of</span> <span word="people">people</span> <span word="whose">whose</span> <span word="bodies">bodies</span> <span word="cannot">cannot</span> <span word="produce">produce</span> <span word="this">this</span> <span word="substance">substance</span>.</p><p> (<span word="B">B</span>)<span word="Many">Many</span> <span word="people">people</span> <span word="whose">whose</span> <span word="bodies">bodies</span> <span word="are">are</span> <span word="unable">unable</span> <span word="to">to</span> <span word="produce">produce</span> <span word="cytochrome">cytochrome</span> <span word="P">P</span>450 <span word="lack">lack</span> <span word="the">the</span> <span word="ability">ability</span> <span word="to">to</span> <span word="produce">produce</span> <span word="certain">certain</span> <span word="other">other</span> <span word="substances">substances</span> <span word="as">as</span> <span word="well">well</span>.</p><p> (<span word="C">C</span>)<span word="Cytochrome">Cytochrome</span> <span word="P">P</span>450 <span word="has">has</span> <span word="no">no</span> <span word="effect">effect</span> <span word="on">on</span> <span word="the">the</span> <span word="brain">brain</span> <span word="other">other</span> <span word="than">than</span> <span word="to">to</span> <span word="protect">protect</span> <span word="it">it</span> <span word="from">from</span> <span word="toxic">toxic</span> <span word="chemicals">chemicals</span>.</p><p> (<span word="D">D</span>)<span word="People">People</span> <span word="with">with</span> <span word="Parkinson">Parkinson</span>\'<span word="s">s</span> <span word="disease">disease</span> <span word="often">often</span> <span word="exhibit">exhibit</span> <span word="a">a</span> <span word="marked">marked</span> <span word="lessening">lessening</span> <span word="in">in</span> <span word="the">the</span> <span word="severity">severity</span> <span word="of">of</span> <span word="their">their</span> <span word="symp">symp</span>-<span word="toms">toms</span> <span word="when">when</span> <span word="they">they</span> <span word="are">are</span> <span word="treated">treated</span> <span word="with">with</span> <span word="dopamine">dopamine</span>, <span word="a">a</span> <span word="chemical">chemical</span> <span word="produced">produced</span> <span word="naturally">naturally</span> <span word="in">in</span> <span word="the">the</span> <span word="brain">brain</span>.</p><p> (<span word="E">E</span>)<span word="Many">Many</span> <span word="people">people</span> <span word="with">with</span> <span word="Parkinson">Parkinson</span>\'<span word="s">s</span> <span word="disease">disease</span> <span word="have">have</span> <span word="the">the</span> <span word="ability">ability</span> <span word="to">to</span> <span word="produce">produce</span> <span word="cytochrome">cytochrome</span> <span word="P">P</span>450 <span word="naturally">naturally</span>.</p><p> 9.<span word="The">The</span> <span word="early">early</span> <span word="universe">universe</span> <span word="contained">contained</span> <span word="only">only</span> <span word="the">the</span> <span word="lightest">lightest</span> <span word="elements">elements</span>, <span word="hydrogen">hydrogen</span> <span word="and">and</span> <span word="helium">helium</span>. <span word="Heavier">Heavier</span> <span word="elements">elements</span>,<span word="such">such</span> <span word="as">as</span> <span word="carbon">carbon</span>, <span word="form">form</span> <span word="only">only</span> <span word="in">in</span> <span word="nuclear">nuclear</span> <span word="reactions">reactions</span> <span word="in">in</span> <span word="stars">stars</span> <span word="and">and</span> <span word="are">are</span> <span word="dispersed">dispersed</span> <span word="when">when</span> <span word="the">the</span> <span word="stars">stars</span> <span word="explode">explode</span>. <span word="A">A</span> <span word="recently">recently</span> <span word="discovered">discovered</span> <span word="gas">gas</span> <span word="cloud">cloud</span> <span word="contained">contained</span> <span word="carbon">carbon</span> <span word="several">several</span> <span word="billion">billion</span> <span word="years">years</span> <span word="ago">ago</span>, <span word="when">when</span> <span word="the">the</span> <span word="universe">universe</span> <span word="was">was</span> <span word="no">no</span> <span word="more">more</span> <span word="than">than</span> <span word="two">two</span> <span word="billion">billion</span> <span word="years">years</span> <span word="old">old</span>.</p>
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