职称英语理工类考试考前每日一练(10)
<p> 职称英语理工类考试考前每日一练</p><p> <span word="The">The</span> <span word="Tiniest">Tiniest</span> <span word="Electric">Electric</span>.<span word="Motor">Motor</span> <span word="in">in</span> <span word="the">the</span> <span word="World">World</span></p><p> 1.<span word="Scientists">Scientists</span> <span word="recently">recently</span> <span word="made">made</span> <span word="public">public</span> <span word="the">the</span> <span word="tiniest">tiniest</span> <span word="electric">electric</span> <span word="motor">motor</span> <span word="ever">ever</span> <span word="built">built</span>.<span word="You">You</span> <span word="could">could</span> <span word="stuff">stuff</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="them">them</span> <span word="into">into</span> <span word="the">the</span> <span word="period">period</span> <span word="at">at</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="this">this</span> <span word="sentence">sentence</span>.<span word="one">one</span> <span word="day">day</span> <span word="a">a</span> <span word="similar">similar</span> <span word="engine">engine</span> <span word="might">might</span>，<span word="power">power</span> <span word="a">a</span> <span word="tmy">tmy</span> <span word="mechanical">mechanical</span> <span word="doctor">doctor</span> <span word="that">that</span>，<span word="would">would</span> <span word="travel">travel</span> <span word="through">through</span> <span word="your">your</span> <span word="body">body</span> <span word="to">to</span> <span word="remove">remove</span> <span word="your">your</span> <span word="disease">disease</span>.</p><p> 2.<span word="The">The</span> <span word="motor">motor</span> <span word="works">works</span> <span word="by">by</span> <span word="shuffling">shuffling</span> <span word="atoms">atoms</span> <span word="between">between</span> <span word="two">two</span> <span word="molten">molten</span> <span word="metal">metal</span> <span word="droplets">droplets</span> <span word="in">in</span> <span word="a">a</span> <span word="carbon">carbon</span> <span word="nanotube">nanotube</span>.<span word="One">One</span> <span word="droplet">droplet</span> <span word="is">is</span> <span word="eyen">eyen</span> <span word="smaller">smaller</span> <span word="than">than</span> <span word="the">the</span> <span word="other">other</span>.<span word="When">When</span> <span word="a">a</span> <span word="small">small</span> <span word="electric">electric</span> <span word="current">current</span> <span word="is">is</span> <span word="applied">applied</span> <span word="to">to</span> <span word="the">the</span> <span word="droplets">droplets</span>，<span word="atoms">atoms</span> <span word="slowly">slowly</span> <span word="get">get</span> <span word="out">out</span> <span word="of">of</span> <span word="the">the</span>。<span word="larger">larger</span> <span word="droplet">droplet</span> <span word="and">and</span> <span word="join">join</span> <span word="the">the</span> <span word="smaller">smaller</span> <span word="one">one</span>.<span word="The">The</span> <span word="small">small</span> <span word="droplet">droplet</span> <span word="growsbut">growsbut</span> <span word="never">never</span> <span word="gets">gets</span> <span word="as">as</span> <span word="big">big</span> <span word="as">as</span> <span word="the">the</span> <span word="other">other</span> <span word="dropletand">dropletand</span> <span word="eventually">eventually</span> <span word="bumps">bumps</span> <span word="into">into</span> <span word="the">the</span> <span word="large">large</span> <span word="droplet">droplet</span>.<span word="As">As</span> <span word="they">they</span> <span word="touch">touch</span>，<span word="the">the</span> <span word="large">large</span> <span word="droplet">droplet</span> <span word="rapidly">rapidly</span> <span word="sops">sops</span> <span word="up">up</span> <span word="the">the</span> <span word="atoms">atoms</span> <span word="it">it</span> <span word="had">had</span> <span word="previously">previously</span> <span word="lost">lost</span>.<span word="This">This</span> <span word="quick">quick</span> <span word="shift">shift</span> <span word="in">in</span> <span word="energy">energy</span> <span word="produces">produces</span> <span word="a">a</span> <span word="power">power</span> <span word="stroke">stroke</span>.</p><p> 3.<span word="The">The</span> <span word="technique">technique</span> <span word="exploits">exploits</span> <span word="the">the</span> <span word="fact">fact</span> <span word="that">that</span> <span word="surface">surface</span> <span word="tensionthe">tensionthe</span> <span word="tendency">tendency</span> <span word="of">of</span> <span word="atoms">atoms</span> <span word="or">or</span> <span word="molecules">molecules</span> <span word="to">to</span> <span word="resist">resist</span> <span word="separating">separating</span>-<span word="becomes">becomes</span> <span word="more">more</span> <span word="important">important</span> <span word="at">at</span> <span word="small">small</span> <span word="scales">scales</span>.<span word="Surface">Surface</span> <span word="tension">tension</span> <span word="is">is</span> <span word="the">the</span> <span word="same">same</span> <span word="thing">thing</span> <span word="that">that</span> <span word="allows">allows</span> <span word="some">some</span> <span word="insects">insects</span> <span word="to">to</span> <span word="walk">walk</span> <span word="on">on</span> <span word="water">water</span>.</p><p> 4.<span word="Although">Although</span> <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="energy">energy</span> <span word="produced">produced</span> <span word="is">is</span> <span word="small">small</span>一20 <span word="microwattsit">microwattsit</span> <span word="is">is</span> <span word="quite">quite</span> <span word="impressive">impressive</span> <span word="in">in</span> <span word="relation">relation</span> <span word="to">to</span> <span word="the">the</span> <span word="tiny">tiny</span> <span word="scale">scale</span> <span word="of">of</span> <span word="the">the</span> <span word="motor">motor</span>.<span word="The">The</span> <span word="whole">whole</span> <span word="setup">setup</span> <span word="is">is</span> <span word="less">less</span> <span word="than">than</span> 200 <span word="nanometers">nanometers</span> <span word="off">off</span> <span word="a">a</span> <span word="side">side</span>，<span word="or">or</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="times">times</span> <span word="smaller">smaller</span> <span word="than">than</span> <span word="the">the</span> <span word="width">width</span> <span word="of">of</span> <span word="a">a</span> <span word="human">human</span> <span word="hair">hair</span>.<span word="If">If</span> <span word="it">it</span> <span word="could">could</span> <span word="be">be</span> <span word="scaled">scaled</span> <span word="up">up</span> <span word="to">to</span> <span word="the">the</span> <span word="size">size</span> <span word="of">of</span> <span word="an">an</span> <span word="automobile">automobile</span> <span word="engine">engine</span>，<span word="it">it</span> <span word="would">would</span> <span word="be">be</span> <span word="l">l</span>00 <span word="million">million</span> <span word="times">times</span> <span word="more">more</span> <span word="powerful">powerful</span> <span word="than">than</span> <span word="a">a</span> <span word="Toyota">Toyota</span> <span word="Camrys">Camrys</span> 225 <span word="horsepower">horsepower</span> <span word="V">V</span>6 <span word="engine">engine</span>.</p>
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