2015年职称英语理工类B级完形填空专项练习(4)
<p> <span word="A">A</span> <span word="dramatic">dramatic</span> <span word="and">and</span> <span word="surprising">surprising</span> <span word="magnetic">magnetic</span> <span word="effect">effect</span> <span word="of">of</span> <span word="light">light</span> <span word="discovered">discovered</span> <span word="by">by</span> <span word="University">University</span> <span word="of">of</span> <span word="Michigan">Michigan</span>1 <span word="researchers">researchers</span> <span word="could">could</span> <span word="lead">lead</span> <span word="to">to</span> <span word="solar">solar</span> <span word="power">power</span> <span word="without">without</span> <span word="traditional">traditional</span> <span word="semiconductor">semiconductor</span>-<span word="based">based</span> <span word="solar">solar</span> <span word="cells">cells</span>.</p><p> <span word="The">The</span> <span word="researchers">researchers</span> <span word="found">found</span> <span word="a">a</span> <span word="way">way</span> <span word="to">to</span> <span word="make">make</span> <span word="an">an</span> <span word="optical">optical</span> 1 , <span word="said">said</span> <span word="Stephen">Stephen</span> <span word="Rand">Rand</span>, <span word="a">a</span> <span word="professor">professor</span> <span word="in">in</span> <span word="the">the</span> <span word="departments">departments</span> <span word="of">of</span> <span word="Electrical">Electrical</span> <span word="Engineering">Engineering</span> <span word="and">and</span> <span word="Computer">Computer</span> <span word="Science">Science</span>, <span word="Physics">Physics</span> <span word="and">and</span> <span word="Applied">Applied</span> <span word="Physics">Physics</span>.</p><p> <span word="Light">Light</span> <span word="has">has</span> <span word="electric">electric</span> <span word="and">and</span> <span word="magnetic">magnetic</span> <span word="components">components</span>. <span word="Until">Until</span> <span word="now">now</span>, <span word="scientists">scientists</span> <span word="thought">thought</span> <span word="the">the</span> 2 <span word="of">of</span> <span word="the">the</span> <span word="magnetic">magnetic</span> <span word="field">field</span> <span word="were">were</span> <span word="so">so</span> <span word="weak">weak</span> <span word="that">that</span> <span word="they">they</span> <span word="could">could</span> <span word="be">be</span> <span word="ignored">ignored</span>. <span word="What">What</span> <span word="Rand">Rand</span> <span word="and">and</span> <span word="his">his</span> <span word="colleagues">colleagues</span> <span word="found">found</span> <span word="is">is</span> <span word="that">that</span> <span word="at">at</span> <span word="the">the</span> <span word="right">right</span> <span word="intensity">intensity</span>, <span word="when">when</span> <span word="light">light</span> <span word="is">is</span> <span word="traveling">traveling</span> <span word="through">through</span> <span word="a">a</span> <span word="material">material</span> <span word="that">that</span> <span word="does">does</span> <span word="not">not</span> <span word="conduct">conduct</span> <span word="electricity">electricity</span>, <span word="the">the</span> <span word="light">light</span> <span word="field">field</span> <span word="can">can</span> <span word="generate">generate</span> <span word="magnetic">magnetic</span> <span word="effects">effects</span> <span word="that">that</span> <span word="are">are</span> 100 <span word="million">million</span> <span word="times">times</span> <span word="stronger">stronger</span> <span word="than">than</span> 3 <span word="expected">expected</span>. 4 <span word="these">these</span> <span word="circumstances">circumstances</span>, <span word="the">the</span> <span word="magnetic">magnetic</span> <span word="effects">effects</span> <span word="develop">develop</span> <span word="strength">strength</span> <span word="equivalent">equivalent</span> <span word="to">to</span> <span word="a">a</span> <span word="strong">strong</span> <span word="electric">electric</span> <span word="effect">effect</span>.</p><p> <span word="This">This</span> <span word="could">could</span> <span word="lead">lead</span> <span word="to">to</span> <span word="a">a</span> <span word="new">new</span> <span word="kind">kind</span> <span word="of">of</span> <span word="solar">solar</span> <span word="cell">cell</span> <span word="without">without</span> <span word="semiconductors">semiconductors</span> <span word="and">and</span> <span word="without">without</span> <span word="absorption">absorption</span> <span word="to">to</span> <span word="produce">produce</span> <span word="charge">charge</span> <span word="separation">separation</span>， <span word="Rand">Rand</span> <span word="said">said</span>. <span word="In">In</span> <span word="solar">solar</span> <span word="cells">cells</span>， <span word="the">the</span> 5 <span word="goes">goes</span> <span word="into">into</span> <span word="a">a</span> <span word="material">material</span>， <span word="gets">gets</span> <span word="absorbed">absorbed</span> <span word="and">and</span> <span word="creates">creates</span> <span word="heat">heat</span>. <span word="Here">Here</span>， <span word="we">we</span> <span word="expect">expect</span> <span word="to">to</span> <span word="have">have</span> <span word="a">a</span> <span word="very">very</span> <span word="low">low</span> <span word="heat">heat</span> <span word="load">load</span>2. <span word="Instead">Instead</span> <span word="of">of</span> <span word="the">the</span> <span word="light">light</span> <span word="being">being</span> <span word="absorbed">absorbed</span>， <span word="energy">energy</span> <span word="is">is</span> <span word="stored">stored</span> <span word="in">in</span> <span word="the">the</span> <span word="magnetic">magnetic</span> <span word="moment">moment</span>3. <span word="Intense">Intense</span> <span word="magnetization">magnetization</span> <span word="can">can</span> <span word="be">be</span> <span word="induced">induced</span> <span word="by">by</span> <span word="intense">intense</span> <span word="light">light</span> <span word="and">and</span> <span word="then">then</span> <span word="it">it</span> <span word="is">is</span> <span word="ultimately">ultimately</span> <span word="capable">capable</span> <span word="of">of</span> <span word="providing">providing</span> <span word="a">a</span> <span word="capacitive">capacitive</span> <span word="power">power</span> 6.<span word="What">What</span> <span word="makes">makes</span> <span word="this">this</span> <span word="possible">possible</span> <span word="is">is</span> <span word="a">a</span> <span word="previously">previously</span> <span word="undetected">undetected</span> <span word="brand">brand</span> <span word="of">of</span> <span word="optical">optical</span> <span word="rectification">rectification</span>4， <span word="says">says</span> <span word="William">William</span> <span word="Fisher">Fisher</span>， <span word="a">a</span> <span word="doctoral">doctoral</span> <span word="student">student</span>5 <span word="in">in</span> <span word="applied">applied</span> <span word="physics">physics</span>. <span word="In">In</span> <span word="traditional">traditional</span> <span word="optical">optical</span> <span word="rectification">rectification</span>， <span word="lights">lights</span> <span word="electric">electric</span> <span word="field">field</span> <span word="causes">causes</span> <span word="a">a</span> <span word="charge">charge</span> <span word="separation">separation</span>， <span word="or">or</span> <span word="a">a</span> <span word="pulling">pulling</span> 7 <span word="of">of</span> <span word="the">the</span> <span word="positive">positive</span> <span word="and">and</span> <span word="negative">negative</span> <span word="charges">charges</span>6 <span word="in">in</span> <span word="a">a</span> <span word="material">material</span>. <span word="This">This</span> <span word="sets">sets</span> <span word="up">up</span> <span word="a">a</span> <span word="voltage">voltage</span>， <span word="similar">similar</span> <span word="to">to</span> 8 <span word="in">in</span> <span word="a">a</span> <span word="battery">battery</span>.</p>
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