职称英语理工类考试考前每日一练(20)
<p> 职称英语理工类考试考前每日一练</p><p> 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，并涂在答题卡相应的位置上.</p><p> <span word="Biological">Biological</span> <span word="Identification">Identification</span> <span word="Technologies">Technologies</span></p><p> <span word="When">When</span> <span word="a">a</span> <span word="person">person</span> <span word="walks">walks</span>.<span word="the">the</span> <span word="movement">movement</span> <span word="of">of</span> <span word="his">his</span> <span word="head">head</span>，<span word="trunk">trunk</span>，<span word="hipbones">hipbones</span> <span word="and">and</span> <span word="limbs">limbs</span> <span word="are">are</span> <span word="all">all</span> <span word="reflected">reflected</span> <span word="in">in</span> <span word="changes">changes</span> <span word="in">in</span> <span word="his">his</span> <span word="body">body</span>.<span word="A">A</span> <span word="computer">computer</span> <span word="these">these</span> <span word="changes">changes</span> <span word="into">into</span> <span word="a">a</span> <span word="database">database</span>.<span word="Later">Later</span>，<span word="the">the</span> <span word="computers">computers</span> <span word="can">can</span> <span word="identifv">identifv</span> <span word="him">him</span> <span word="according">according</span> <span word="to">to</span> <span word="these">these</span> <span word="changes">changes</span>.<span word="This">This</span> <span word="is">is</span> <span word="a">a</span> <span word="new">new</span> <span word="hiological">hiological</span> <span word="identification">identification</span> <span word="method">method</span> <span word="and">and</span> <span word="it">it</span> <span word="can">can</span> <span word="quiekly">quiekly</span> <span word="identify">identify</span> <span word="an">an</span> <span word="examinee">examinee</span> <span word="disturbing">disturbing</span> <span word="him">him</span>.<span word="Its">Its</span> <span word="especially">especially</span> <span word="suitable">suitable</span> <span word="for">for</span> <span word="use">use</span> <span word="in">in</span> <span word="airports">airports</span> <span word="and">and</span> <span word="supermarkets">supermarkets</span>.</p><p> <span word="Everybodys">Everybodys</span> <span word="voice">voice</span> <span word="is">is</span> .<span word="When">When</span> <span word="a">a</span> <span word="persons">persons</span> <span word="voice">voice</span> <span word="is">is</span> <span word="recorded">recorded</span> <span word="by">by</span> <span word="an">an</span> <span word="instrument">instrument</span>，<span word="its">its</span> <span word="voice">voice</span> <span word="frequencY">frequencY</span> <span word="spectrum">spectrum</span> <span word="is">is</span> <span word="called">called</span> <span word="his">his</span> <span word="sound">sound</span> <span word="print">print</span>.<span word="Like">Like</span> <span word="a">a</span> <span word="fingerprint">fingerprint</span>，<span word="everybodys">everybodys</span> <span word="sound">sound</span> <span word="print">print</span> <span word="is">is</span> <span word="different">different</span>.<span word="How">How</span> <span word="can">can</span> <span word="computers">computers</span> <span word="his">his</span> <span word="sound">sound</span>? <span word="First">First</span>，<span word="his">his</span> <span word="voice">voice</span> <span word="is">is</span> <span word="recorded">recorded</span>，<span word="which">which</span> <span word="allows">allows</span> <span word="the">the</span> <span word="computers">computers</span> <span word="to">to</span> <span word="become">become</span> <span word="familiar">familiar</span> <span word="with">with</span> <span word="his">his</span> <span word="voice">voice</span>.<span word="It">It</span> <span word="will">will</span> <span word="then">then</span> <span word="turn">turn</span> <span word="his">his</span> <span word="sound">sound</span> <span word="characteristics">characteristics</span> <span word="into">into</span> <span word="a">a</span> <span word="of">of</span> <span word="digits">digits</span>.<span word="These">These</span> <span word="digits">digits</span> <span word="represent">represent</span> <span word="the">the</span> <span word="frequency">frequency</span>，<span word="pitch">pitch</span> <span word="and">and</span> <span word="rhythni">rhythni</span> <span word="of">of</span> <span word="the">the</span> <span word="persons">persons</span> <span word="voice">voice</span>. <span word="These">These</span> <span word="are">are</span> <span word="the">the</span> <span word="on">on</span> <span word="which">which</span> <span word="the">the</span> <span word="computers">computers</span> <span word="can">can</span> <span word="distinguish">distinguish</span> 1 <span word="his">his</span> <span word="voice">voice</span> <span word="from">from</span> .</p><p> <span word="When">When</span> <span word="that">that</span> <span word="person">person</span> <span word="needs">needs</span> <span word="to">to</span> <span word="be">be</span> <span word="identified">identified</span>.<span word="after">after</span> <span word="he">he</span> <span word="says">says</span> <span word="only">only</span> <span word="one">one</span> <span word="word">word</span> <span word="or">or</span> <span word="two">two</span>，<span word="the">the</span> <span word="computers">computers</span> <span word="can">can</span> <span word="identify">identify</span> <span word="him">him</span>.<span word="The">The</span> <span word="computers">computers</span> <span word="can">can</span> <span word="even">even</span> <span word="identifv">identifv</span> <span word="sounds">sounds</span> <span word="coming">coming</span> <span word="the">the</span> <span word="wires">wires</span>.<span word="This">This</span> <span word="will">will</span> <span word="provide">provide</span> <span word="a">a</span> <span word="guarantee">guarantee</span> <span word="to">to</span> <span word="electric">electric</span> <span word="banks">banks</span> <span word="and">and</span> <span word="electric">electric</span> <span word="purchases">purchases</span>.</p>
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