新GRE阅读练习题（13）
<p> 编辑点评： 新<span word="GRE">GRE</span>阅读考试考察大家的方面较多，除了大家需要拥有一定的词汇量以外，还需大家在解题的时候能够迅速了解出题者的意图，这就需要大家充分发挥自己的逻辑理解能力和推理能力，大家可以利用下文的新<span word="GRE">GRE</span>阅读短文练习进行练习。</p><p> <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="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="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="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="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="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>
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