2015考研英语阅读非常蟑螂
<p> <span word="Flipping">Flipping</span> <span word="roaches">roaches</span></p><p> 非常蟑螂</p><p> <span word="How">How</span> <span word="cockroaches">cockroaches</span> <span word="vanish">vanish</span>.</p><p> 蟑螂是怎么消失不见的?</p><p> <span word="ANYONE">ANYONE</span> <span word="who">who</span> <span word="has">has</span> <span word="tried">tried</span> <span word="to">to</span> <span word="swat">swat</span> <span word="a">a</span> <span word="cockroach">cockroach</span> <span word="willknow">willknow</span> <span word="those">those</span> <span word="insects">insects</span> <span word="strange">strange</span> <span word="ability">ability</span>, <span word="in">in</span> <span word="the">the</span> <span word="heat">heat</span> <span word="ofpursuit">ofpursuit</span>, <span word="to">to</span> <span word="disappear">disappear</span>. <span word="Robert">Robert</span> <span word="Full">Full</span> <span word="and">and</span> <span word="his">his</span> <span word="colleaguesat">colleaguesat</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="California">California</span>, <span word="Berkeley">Berkeley</span>, <span word="have">have</span> <span word="now">now</span> <span word="worked">worked</span> <span word="out">out</span> <span word="how">how</span> <span word="they">they</span> <span word="do">do</span> <span word="this">this</span>-<span word="and">and</span> <span word="taught">taught</span> <span word="aminiature">aminiature</span> <span word="robot">robot</span> <span word="to">to</span> <span word="copy">copy</span> <span word="the">the</span> <span word="feat">feat</span>.</p><p> 只要打过蟑螂的都知道它们特殊的本领往往在追赶最激烈的时候突然消失不见了。加州大学伯克利分校的<span word="Robert">Robert</span> <span word="Full">Full</span>和他的同事现在已明白它们是怎么做到的，并用一个微型机器人模拟了这个过程。</p><p> <span word="Dr">Dr</span> <span word="Full">Full</span> <span word="had">had</span> <span word="been">been</span> <span word="using">using</span> <span word="high">high</span>-<span word="speed">speed</span> <span word="photography">photography</span> <span word="to">to</span> <span word="study">study</span> <span word="how">how</span> <span word="cockroaches">cockroaches</span> <span word="employ">employ</span> <span word="theirantennae">theirantennae</span> <span word="to">to</span> <span word="sense">sense</span> <span word="and">and</span> <span word="cross">cross</span> <span word="gaps">gaps</span>. <span word="When">When</span> <span word="the">the</span> <span word="researchers">researchers</span> <span word="made">made</span> <span word="the">the</span> <span word="gaps">gaps</span> <span word="wider">wider</span>, <span word="they">they</span> <span word="saw">saw</span> <span word="theanimals">theanimals</span> <span word="flipping">flipping</span> <span word="back">back</span> <span word="underneath">underneath</span> <span word="the">the</span> <span word="ledge">ledge</span> <span word="at">at</span> <span word="the">the</span> <span word="edge">edge</span> <span word="of">of</span> <span word="the">the</span> <span word="gap">gap</span>, <span word="rather">rather</span> <span word="than">than</span> <span word="jumping">jumping</span> <span word="acrossthe">acrossthe</span> <span word="empty">empty</span> <span word="space">space</span>. <span word="As">As</span> <span word="they">they</span> <span word="report">report</span> <span word="in">in</span> <span word="the">the</span> <span word="Public">Public</span> <span word="Library">Library</span> <span word="of">of</span> <span word="Science">Science</span>, <span word="cockroaches">cockroaches</span> <span word="running">running</span> <span word="towardsa">towardsa</span> <span word="gap">gap</span> <span word="suddenly">suddenly</span> <span word="grip">grip</span> <span word="the">the</span> <span word="edge">edge</span> <span word="with">with</span> <span word="the">the</span> <span word="hooklike">hooklike</span> <span word="claws">claws</span> <span word="on">on</span> <span word="their">their</span> <span word="rear">rear</span> <span word="legs">legs</span> <span word="and">and</span> <span word="swing">swing</span> 180 <span word="toland">toland</span> <span word="firmly">firmly</span> <span word="underneath">underneath</span> <span word="the">the</span> <span word="ledge">ledge</span>, <span word="upside">upside</span> <span word="down">down</span>. <span word="They">They</span> <span word="can">can</span> <span word="pull">pull</span> <span word="off">off</span> <span word="this">this</span> <span word="stunt">stunt</span> <span word="in">in</span> <span word="a">a</span> <span word="fifth">fifth</span> <span word="of">of</span> <span word="asecond">asecond</span>-<span word="so">so</span> <span word="fast">fast</span> <span word="that">that</span> <span word="the">the</span> <span word="animals">animals</span> <span word="bodies">bodies</span> <span word="are">are</span> <span word="subject">subject</span> <span word="to">to</span> <span word="between">between</span> <span word="three">three</span> <span word="and">and</span> <span word="five">five</span> <span word="times">times</span> <span word="the">the</span> <span word="forceof">forceof</span> <span word="gravity">gravity</span>, <span word="and">and</span> <span word="also">also</span> <span word="so">so</span> <span word="fast">fast</span> <span word="that">that</span> <span word="the">the</span> <span word="movement">movement</span> <span word="is">is</span> <span word="invisible">invisible</span> <span word="to">to</span> <span word="the">the</span> <span word="human">human</span> <span word="eye">eye</span>.</p><p> <span word="Full">Full</span>博士运用了高速摄影技术来研究蟑螂是如何使触须去感知和穿过缝隙。当研究者把缝隙扩宽，发现蟑螂直接在缝隙边缘翻转下去，而不是跳过缝隙，正如《科学公共图书馆》所报道的那样，蟑螂先迅速冲向缝隙，然后用后腿上的钩状爪子抓住边缘，顺势摆动180，头朝下牢牢抓住平板底部。它们能在0.2秒内完成这项绝技，这么快的速度蟑螂的身体要承受3到5倍的重力加速度，也正是由于这么快的移动速度才让人类难以发现。</p>
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