职称英语考题2010年卫生B类阅读理解
<p> 导语：以下英语网为大家整理了全面的职称英语考试历年真题及答案解析，《职称英语考试试题汇总：历年真题及答案解析》供大家参考学习。更多职称英语考试试题敬请关注英语网！</p><p>【推荐】关注英语网微信：<span word="yingyuwang">yingyuwang</span>2013，更快获取真题答案及成绩查询信息。</p><p> 第 4部分:阅读理解 (第 31~45题,每题 3分 ,共 45分) </p><p> 下面有3篇短文，每篇短文有5道题。请根据短文内容，为每题定1个最佳选项。 </p><p> 第一篇 </p><p> <span word="Human">Human</span> <span word="Heart">Heart</span> <span word="Can">Can</span> <span word="Make">Make</span> <span word="New">New</span> <span word="Cells">Cells</span> </p><p> <span word="Solving">Solving</span> <span word="a">a</span> <span word="longstanding">longstanding</span> <span word="mystery">mystery</span>, <span word="scientists">scientists</span> <span word="have">have</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="human">human</span> <span word="heart">heart</span> <span word="continues">continues</span> <span word="to">to</span> <span word="generate">generate</span> <span word="new">new</span> <span word="cardiac">cardiac</span> <span word="cells">cells</span> <span word="throughout">throughout</span> <span word="the">the</span> <span word="life">life</span> <span word="span">span</span>, <span word="although">although</span> <span word="the">the</span> <span word="rate">rate</span> <span word="of">of</span> <span word="new">new</span> <span word="cell">cell</span> <span word="production">production</span> <span word="slows">slows</span> <span word="with">with</span> <span word="age">age</span>.</p><p> <span word="The">The</span> <span word="finding">finding</span>, <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="April">April</span> 3 <span word="issue">issue</span> <span word="of">of</span> <span word="Science">Science</span>, <span word="could">could</span> <span word="open">open</span> <span word="a">a</span> <span word="new">new</span> <span word="path">path</span> <span word="for">for</span> <span word="the">the</span> <span word="treatment">treatment</span> <span word="of">of</span> <span word="heart">heart</span> <span word="diseases">diseases</span> <span word="such">such</span> <span word="as">as</span> <span word="heart">heart</span> <span word="failure">failure</span> <span word="and">and</span> <span word="heart">heart</span> <span word="attack">attack</span> ,<span word="experts">experts</span> <span word="say">say</span>.</p><p> <span word="We">We</span> <span word="find">find</span> <span word="that">that</span> <span word="the">the</span> <span word="beating">beating</span> <span word="cells">cells</span> <span word="in">in</span> <span word="the">the</span> <span word="heart">heart</span>, <span word="cardiomyocytes">cardiomyocytes</span>, <span word="are">are</span> <span word="renewed">renewed</span>,<span word="said">said</span> <span word="lead">lead</span> <span word="researcher">researcher</span> <span word="Dr">Dr</span>. <span word="Jonas">Jonas</span> <span word="Frisen">Frisen</span>, <span word="a">a</span> <span word="professor">professor</span> <span word="of">of</span> <span word="stem">stem</span> <span word="cell">cell</span> <span word="research">research</span> <span word="at">at</span> <span word="the">the</span> <span word="Karolinska">Karolinska</span> <span word="Institute">Institute</span> <span word="in">in</span> <span word="Stockholm">Stockholm</span>, <span word="Sweden">Sweden</span>. <span word="It">It</span> <span word="has">has</span> <span word="previously">previously</span> <span word="not">not</span> <span word="been">been</span> <span word="known">known</span> <span word="whether">whether</span> <span word="we">we</span> <span word="were">were</span> <span word="limited">limited</span> <span word="to">to</span> <span word="the">the</span> <span word="cardiomyocytes">cardiomyocytes</span> <span word="we">we</span> <span word="are">are</span> <span word="bom">bom</span> <span word="with">with</span> <span word="or">or</span> <span word="if">if</span> <span word="they">they</span> <span word="could">could</span> <span word="be">be</span> <span word="renewed">renewed</span>. <span word="he">he</span> <span word="said">said</span>.</p><p> <span word="The">The</span> <span word="process">process</span> <span word="of">of</span> <span word="renewing">renewing</span> <span word="these">these</span> <span word="cells">cells</span> <span word="changes">changes</span> <span word="over">over</span> <span word="time">time</span>, <span word="Frisen">Frisen</span> <span word="added">added</span>. <span word="In">In</span> <span word="a">a</span> 20-<span word="year">year</span>-<span word="old">old</span>, <span word="about">about</span> 1 <span word="percent">percent</span> <span word="of">of</span> <span word="cardiomyocytes">cardiomyocytes</span> <span word="are">are</span> <span word="exchanged">exchanged</span> <span word="each">each</span> <span word="year">year</span>, <span word="but">but</span> <span word="the">the</span> <span word="turnover">turnover</span> <span word="rate">rate</span> <span word="decreases">decreases</span> <span word="with">with</span> <span word="age">age</span> <span word="to">to</span> <span word="only">only</span> 0. 45 <span word="percent">percent</span> <span word="by">by</span> <span word="age">age</span> 75.</p>
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