Fingerprints 阅读练习与解析
<p> <span word="Fingerprints">Fingerprints</span></p><p> <span word="The">The</span> <span word="search">search</span> <span word="for">for</span> <span word="latent">latent</span> <span word="prints">prints</span> <span word="is">is</span> <span word="done">done</span> <span word="in">in</span> <span word="a">a</span> <span word="systematic">systematic</span> <span word="and">and</span> <span word="intelligent">intelligent</span> <span word="manner">manner</span>. <span word="Investigators">Investigators</span> <span word="develop">develop</span> <span word="techniques">techniques</span> <span word="to">to</span> <span word="locate">locate</span> <span word="traces">traces</span> <span word="of">of</span> <span word="fingerprints">fingerprints</span> <span word="at">at</span> <span word="a">a</span> <span word="crime">crime</span> <span word="scene">scene</span>. <span word="The">The</span> <span word="basic">basic</span> <span word="premise">premise</span> <span word="in">in</span> <span word="searching">searching</span> <span word="for">for</span> <span word="latent">latent</span> <span word="prints">prints</span> <span word="is">is</span> <span word="to">to</span> <span word="examine">examine</span> <span word="more">more</span> <span word="carefully">carefully</span> <span word="those">those</span> <span word="areas">areas</span>, <span word="which">which</span> <span word="would">would</span> <span word="most">most</span> <span word="likely">likely</span> <span word="be">be</span> <span word="touched">touched</span> <span word="by">by</span> <span word="persons">persons</span> <span word="who">who</span> <span word="have">have</span> <span word="been">been</span> <span word="on">on</span> <span word="the">the</span> <span word="scene">scene</span>. <span word="The">The</span> <span word="natural">natural</span> <span word="manner">manner</span> <span word="in">in</span> <span word="which">which</span> <span word="a">a</span> <span word="person">person</span> <span word="would">would</span> <span word="use">use</span> <span word="and">and</span> <span word="place">place</span> <span word="his">his</span> <span word="hands">hands</span> <span word="in">in</span> <span word="making">making</span> <span word="an">an</span> <span word="entrance">entrance</span> <span word="or">or</span> <span word="exit">exit</span> <span word="from">from</span> <span word="a">a</span> <span word="building">building</span> <span word="or">or</span> <span word="in">in</span> <span word="handling">handling</span> <span word="any">any</span> <span word="object">object</span> <span word="is">is</span> <span word="the">the</span> <span word="key">key</span> <span word="to">to</span> <span word="the">the</span> <span word="discovery">discovery</span> <span word="of">of</span> <span word="latent">latent</span> <span word="prints">prints</span>.</p><p> <span word="Where">Where</span> <span word="a">a</span> <span word="forced">forced</span> <span word="entrance">entrance</span> <span word="has">has</span> <span word="been">been</span> <span word="made">made</span>, <span word="latent">latent</span> <span word="prints">prints</span> <span word="are">are</span> <span word="likely">likely</span> <span word="to">to</span> <span word="be">be</span> <span word="found">found</span> <span word="on">on</span> <span word="any">any</span> <span word="surface">surface</span> <span word="adjacent">adjacent</span> <span word="to">to</span> <span word="or">or</span> <span word="at">at</span> <span word="that">that</span> <span word="point">point</span>. <span word="Any">Any</span> <span word="object">object</span> <span word="with">with</span> <span word="a">a</span> <span word="smooth">smooth</span>, <span word="non">non</span>-<span word="porous">porous</span> <span word="surface">surface</span> <span word="is">is</span> <span word="likely">likely</span> <span word="to">to</span> <span word="retain">retain</span> <span word="latent">latent</span> <span word="prints">prints</span> <span word="if">if</span> <span word="touched">touched</span>. <span word="Fingerprints">Fingerprints</span> <span word="on">on</span> <span word="rough">rough</span> <span word="surfaces">surfaces</span> <span word="are">are</span> <span word="usually">usually</span> <span word="of">of</span> <span word="little">little</span> <span word="value">value</span>. <span word="If">If</span> <span word="the">the</span> <span word="fingermark">fingermark</span> <span word="does">does</span> <span word="not">not</span> <span word="disclose">disclose</span> <span word="ridge">ridge</span> <span word="detail">detail</span> <span word="when">when</span> <span word="viewed">viewed</span> <span word="under">under</span> <span word="a">a</span> <span word="reading">reading</span> <span word="glass">glass</span>, <span word="the">the</span> <span word="chances">chances</span> <span word="are">are</span> <span word="that">that</span> <span word="its">its</span> <span word="value">value</span> <span word="in">in</span> <span word="identification">identification</span> <span word="is">is</span> <span word="nil">nil</span> <span word="when">when</span> <span word="photographed">photographed</span>. <span word="Where">Where</span> <span word="fingermarks">fingermarks</span> <span word="are">are</span> <span word="found">found</span>, <span word="it">it</span> <span word="will">will</span> <span word="be">be</span> <span word="necessary">necessary</span> <span word="for">for</span> <span word="the">the</span> <span word="investigator">investigator</span> <span word="to">to</span> <span word="compare">compare</span> <span word="them">them</span> <span word="against">against</span> <span word="the">the</span> <span word="ones">ones</span> <span word="of">of</span> <span word="persons">persons</span> <span word="having">having</span> <span word="legitimate">legitimate</span> <span word="access">access</span> <span word="to">to</span> <span word="the">the</span> <span word="premises">premises</span> <span word="so">so</span> <span word="that">that</span> <span word="the">the</span> <span word="traces">traces</span> <span word="might">might</span> <span word="be">be</span> <span word="eliminated">eliminated</span> <span word="as">as</span> <span word="having">having</span> <span word="evidentiary">evidentiary</span> <span word="value">value</span> <span word="if">if</span> <span word="they">they</span> <span word="prove">prove</span> <span word="to">to</span> <span word="be">be</span> <span word="from">from</span> <span word="these">these</span> <span word="persons">persons</span>. <span word="Places">Places</span> <span word="to">to</span> <span word="search">search</span> <span word="for">for</span> <span word="prints">prints</span> <span word="on">on</span> <span word="an">an</span> <span word="automobile">automobile</span> <span word="are">are</span> <span word="the">the</span> <span word="rear">rear</span> <span word="view">view</span> <span word="mirror">mirror</span>, <span word="steering">steering</span> <span word="wheel">wheel</span> <span word="hub">hub</span>, <span word="steering">steering</span> <span word="column">column</span>, <span word="windshield">windshield</span> <span word="dashboard">dashboard</span> <span word="and">and</span> <span word="the">the</span> <span word="like">like</span>.</p><p> <span word="Dusting">Dusting</span> <span word="of">of</span> <span word="surface">surface</span> <span word="may">may</span> <span word="be">be</span> <span word="done">done</span> <span word="with">with</span> <span word="a">a</span> <span word="fine">fine</span> <span word="brush">brush</span> <span word="or">or</span> <span word="with">with</span> <span word="an">an</span> <span word="atomizer">atomizer</span>. <span word="The">The</span> <span word="whit">whit</span> <span word="powders">powders</span> <span word="used">used</span> <span word="are">are</span> <span word="basically">basically</span> <span word="finely">finely</span> <span word="powdered">powdered</span> <span word="white">white</span> <span word="lead">lead</span>, <span word="talc">talc</span>, <span word="or">or</span> <span word="chalk">chalk</span>. <span word="Another">Another</span> <span word="light">light</span> <span word="powder">powder</span> <span word="is">is</span> <span word="basically">basically</span> <span word="Chemists">Chemists</span> <span word="gray">gray</span>. <span word="A">A</span> <span word="good">good</span> <span word="black">black</span> <span word="powder">powder</span> <span word="is">is</span> <span word="composed">composed</span> <span word="of">of</span> <span word="lampblack">lampblack</span>, <span word="graphite">graphite</span>, <span word="and">and</span> <span word="powdered">powdered</span> <span word="acacia">acacia</span>. <span word="Dragons">Dragons</span> <span word="blood">blood</span> <span word="is">is</span> <span word="good">good</span> <span word="powder">powder</span> <span word="for">for</span> <span word="white">white</span> <span word="surface">surface</span> <span word="and">and</span> <span word="can">can</span> <span word="be">be</span> <span word="fixed">fixed</span> <span word="on">on</span> <span word="paper">paper</span> <span word="by">by</span> <span word="heating">heating</span>. <span word="In">In</span> <span word="developing">developing</span> <span word="latent">latent</span> <span word="prints">prints</span>, <span word="the">the</span> <span word="accepted">accepted</span> <span word="method">method</span> <span word="is">is</span> <span word="to">to</span> <span word="use">use</span> <span word="the">the</span> <span word="powder">powder</span> <span word="sparingly">sparingly</span> <span word="and">and</span> <span word="brush">brush</span> <span word="lightly">lightly</span>. <span word="Do">Do</span> <span word="not">not</span> <span word="use">use</span> <span word="powder">powder</span> <span word="if">if</span> <span word="the">the</span> <span word="fingermark">fingermark</span> <span word="is">is</span> <span word="visible">visible</span> <span word="under">under</span> <span word="oblique">oblique</span> <span word="lighting">lighting</span>. <span word="It">It</span> <span word="can">can</span> <span word="be">be</span> <span word="photographed">photographed</span>. <span word="A">A</span> <span word="good">good</span> <span word="policy">policy</span> <span word="for">for</span> <span word="the">the</span> <span word="novice">novice</span> <span word="is">is</span> <span word="to">to</span> <span word="experiment">experiment</span> <span word="with">with</span> <span word="his">his</span> <span word="own">own</span> <span word="prints">prints</span> <span word="on">on</span> <span word="a">a</span> <span word="surface">surface</span> <span word="similar">similar</span> <span word="to">to</span> <span word="the">the</span> <span word="one">one</span> <span word="he">he</span> <span word="wishes">wishes</span> <span word="to">to</span> <span word="search">search</span> <span word="in">in</span> <span word="order">order</span> <span word="to">to</span> <span word="determine">determine</span> <span word="the">the</span> <span word="powder">powder</span> <span word="best">best</span> <span word="suited">suited</span> <span word="to">to</span> <span word="the">the</span> <span word="surface">surface</span>. <span word="Fingerprints">Fingerprints</span> <span word="after">after</span> <span word="dusting">dusting</span> <span word="may">may</span> <span word="be">be</span> <span word="lifted">lifted</span> <span word="by">by</span> <span word="using">using</span> <span word="fresh">fresh</span> <span word="cellulose">cellulose</span> <span word="tape">tape</span> <span word="or">or</span> <span word="commercially">commercially</span> <span word="prepared">prepared</span> <span word="material">material</span> <span word="especially">especially</span> <span word="designed">designed</span> <span word="to">to</span> <span word="lift">lift</span> <span word="and">and</span> <span word="transfer">transfer</span> <span word="dusted">dusted</span> <span word="latent">latent</span> <span word="fingerprints">fingerprints</span>.</p>
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