2012考研阅读资料经典美文4
<p>04 <span word="Electricity">Electricity</span></p><p><span word="The">The</span> <span word="modern">modern</span> <span word="age">age</span> <span word="is">is</span> <span word="an">an</span> <span word="age">age</span> <span word="of">of</span> <span word="electricity">electricity</span>. <span word="People">People</span> <span word="are">are</span> <span word="so">so</span> <span word="used">used</span> <span word="to">to</span> <span word="electric">electric</span> <span word="lights">lights</span>, <span word="radio">radio</span>, <span word="televisions">televisions</span>, <span word="and">and</span> <span word="telephones">telephones</span> <span word="that">that</span> <span word="it">it</span> <span word="is">is</span> <span word="hard">hard</span> <span word="to">to</span> <span word="imagine">imagine</span> <span word="what">what</span> <span word="life">life</span> <span word="would">would</span> <span word="be">be</span> <span word="like">like</span> <span word="without">without</span> <span word="them">them</span>. <span word="When">When</span> <span word="there">there</span> <span word="is">is</span> <span word="a">a</span> <span word="power">power</span> <span word="failure">failure</span>, <span word="people">people</span> <span word="grope">grope</span> <span word="about">about</span> <span word="in">in</span> <span word="flickering">flickering</span> <span word="candlelight">candlelight</span>, <span word="cars">cars</span> <span word="hesitate">hesitate</span> <span word="in">in</span> <span word="the">the</span> <span word="streets">streets</span> <span word="because">because</span> <span word="there">there</span> <span word="are">are</span> <span word="no">no</span> <span word="traffic">traffic</span> <span word="lights">lights</span> <span word="to">to</span> <span word="guide">guide</span> <span word="them">them</span>, <span word="and">and</span> <span word="food">food</span> <span word="spoils">spoils</span> <span word="in">in</span> <span word="silent">silent</span> <span word="refrigerators">refrigerators</span>.</p><p><span word="Yet">Yet</span>, <span word="people">people</span> <span word="began">began</span> <span word="to">to</span> <span word="understand">understand</span> <span word="how">how</span> <span word="electricity">electricity</span> <span word="works">works</span> <span word="only">only</span> <span word="a">a</span> <span word="little">little</span> <span word="more">more</span> <span word="than">than</span> <span word="two">two</span> <span word="centuries">centuries</span> <span word="ago">ago</span>. <span word="Nature">Nature</span> <span word="has">has</span> <span word="apparently">apparently</span> <span word="been">been</span> <span word="experimenting">experimenting</span> <span word="in">in</span> <span word="this">this</span> <span word="field">field</span> <span word="for">for</span> <span word="million">million</span> <span word="of">of</span> <span word="years">years</span>. <span word="Scientists">Scientists</span> <span word="are">are</span> <span word="discovering">discovering</span> <span word="more">more</span> <span word="and">and</span> <span word="more">more</span> <span word="that">that</span> <span word="the">the</span> <span word="living">living</span> <span word="world">world</span> <span word="may">may</span> <span word="hold">hold</span> <span word="many">many</span> <span word="interesting">interesting</span> <span word="secrets">secrets</span> <span word="of">of</span> <span word="electricity">electricity</span> <span word="that">that</span> <span word="could">could</span> <span word="benefit">benefit</span> <span word="humanity">humanity</span>.</p><p>All living cell send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely smalloften so small that sensitive instruments are needed to record them. But in some animals, cert 04 <span word="Electricity">Electricity</span></p><p> <span word="The">The</span> <span word="modern">modern</span> <span word="age">age</span> <span word="is">is</span> <span word="an">an</span> <span word="age">age</span> <span word="of">of</span> <span word="electricity">electricity</span>. <span word="People">People</span> <span word="are">are</span> <span word="so">so</span> <span word="used">used</span> <span word="to">to</span> <span word="electric">electric</span> <span word="lights">lights</span>, <span word="radio">radio</span>, <span word="televisions">televisions</span>, <span word="and">and</span> <span word="telephones">telephones</span> <span word="that">that</span> <span word="it">it</span> <span word="is">is</span> <span word="hard">hard</span> <span word="to">to</span> <span word="imagine">imagine</span> <span word="what">what</span> <span word="life">life</span> <span word="would">would</span> <span word="be">be</span> <span word="like">like</span> <span word="without">without</span> <span word="them">them</span>. <span word="When">When</span> <span word="there">there</span> <span word="is">is</span> <span word="a">a</span> <span word="power">power</span> <span word="failure">failure</span>, <span word="people">people</span> <span word="grope">grope</span> <span word="about">about</span> <span word="in">in</span> <span word="flickering">flickering</span> <span word="candlelight">candlelight</span>, <span word="cars">cars</span> <span word="hesitate">hesitate</span> <span word="in">in</span> <span word="the">the</span> <span word="streets">streets</span> <span word="because">because</span> <span word="there">there</span> <span word="are">are</span> <span word="no">no</span> <span word="traffic">traffic</span> <span word="lights">lights</span> <span word="to">to</span> <span word="guide">guide</span> <span word="them">them</span>, <span word="and">and</span> <span word="food">food</span> <span word="spoils">spoils</span> <span word="in">in</span> <span word="silent">silent</span> <span word="refrigerators">refrigerators</span>.</p>
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