2017届高考英语二轮阅读理解训练：（25）
<p> 2017届高考英语二轮专题训练：阅读理解（25）</p><p> <span word="A">A</span></p><p> <span word="Medical">Medical</span> <span word="drugs">drugs</span> <span word="sometimes">sometimes</span> <span word="cause">cause</span> <span word="more">more</span> <span word="damage">damage</span> <span word="than">than</span> <span word="they">they</span> <span word="cure">cure</span>. <span word="One">One</span> <span word="solution">solution</span> <span word="to">to</span> <span word="this">this</span> <span word="problem">problem</span> <span word="is">is</span> <span word="to">to</span> <span word="put">put</span> <span word="the">the</span> <span word="drugs">drugs</span> <span word="inside">inside</span> <span word="a">a</span> <span word="capsule">capsule</span>, <span word="protecting">protecting</span> <span word="them">them</span> <span word="from">from</span> <span word="the">the</span> <span word="body">body</span>—<span word="and">and</span> <span word="the">the</span> <span word="body">body</span> <span word="from">from</span> <span word="them">them</span>—<span word="until">until</span> <span word="they">they</span> <span word="can">can</span> <span word="be">be</span> <span word="released">released</span> <span word="at">at</span> <span word="just">just</span> <span word="the">the</span> <span word="right">right</span> <span word="spot">spot</span>. <span word="There">There</span> <span word="are">are</span> <span word="lots">lots</span> <span word="of">of</span> <span word="ways">ways</span> <span word="to">to</span> <span word="trigger">trigger</span> (引发) <span word="this">this</span> <span word="release">release</span>，<span word="including">including</span> <span word="changing">changing</span> <span word="temperature">temperature</span>, <span word="acidity">acidity</span>, <span word="and">and</span> <span word="so">so</span> <span word="on">on</span>. <span word="But">But</span> <span word="triggers">triggers</span> <span word="can">can</span> <span word="come">come</span> <span word="with">with</span> <span word="their">their</span> <span word="own">own</span> <span word="risks">risks</span>—<span word="burns">burns</span>, <span word="for">for</span> <span word="example">example</span>. <span word="Now">Now</span>, <span word="researchers">researchers</span> <span word="in">in</span> <span word="California">California</span> <span word="have">have</span> <span word="designed">designed</span> <span word="what">what</span> <span word="could">could</span> <span word="be">be</span> <span word="a">a</span> <span word="harmless">harmless</span> <span word="trigger">trigger</span> <span word="to">to</span> <span word="date">date</span>: <span word="shining">shining</span> <span word="near">near</span><span word="infrared">infrared</span> <span word="light">light</span> (<span word="NIR">NIR</span>, 近红外线) <span word="on">on</span> <span word="the">the</span> <span word="drug">drug</span> <span word="in">in</span> <span word="the">the</span> <span word="capsule">capsule</span>.</p><p> <span word="The">The</span> <span word="idea">idea</span> <span word="of">of</span> <span word="using">using</span> <span word="light">light</span> <span word="to">to</span> <span word="liberate">liberate</span> <span word="the">the</span> <span word="drug">drug</span> <span word="in">in</span> <span word="the">the</span> <span word="capsule">capsule</span> <span word="isn">isn</span>'<span word="t">t</span> <span word="new">new</span>. <span word="Researchers">Researchers</span> <span word="around">around</span> <span word="the">the</span> <span word="globe">globe</span> <span word="have">have</span> <span word="developed">developed</span> <span word="polymers">polymers</span> (聚合物) <span word="and">and</span> <span word="other">other</span> <span word="materials">materials</span> <span word="that">that</span> <span word="begin">begin</span> <span word="to">to</span> <span word="break">break</span> <span word="down">down</span> <span word="when">when</span> <span word="they">they</span> <span word="absorb">absorb</span> <span word="either">either</span> <span word="ultraviolet">ultraviolet</span> (<span word="UV">UV</span>, 紫外线) <span word="or">or</span> <span word="visible">visible</span> <span word="light">light</span>. <span word="But">But</span> <span word="tissues">tissues</span> <span word="also">also</span> <span word="readily">readily</span> <span word="absorb">absorb</span> <span word="UV">UV</span> <span word="and">and</span> <span word="visible">visible</span> <span word="light">light</span>, <span word="which">which</span> <span word="means">means</span> <span word="the">the</span> <span word="drug">drug</span> <span word="release">release</span> <span word="can">can</span> <span word="be">be</span> <span word="triggered">triggered</span> <span word="only">only</span> <span word="near">near</span> <span word="the">the</span> <span word="skin">skin</span>, <span word="where">where</span> <span word="the">the</span> <span word="light">light</span> <span word="can">can</span> <span word="reach">reach</span> <span word="the">the</span> <span word="capsule">capsule</span>. <span word="NIR">NIR</span> <span word="light">light</span> <span word="largely">largely</span> <span word="passes">passes</span> <span word="through">through</span> <span word="tissues">tissues</span>, <span word="so">so</span> <span word="researchers">researchers</span> <span word="have">have</span> <span word="tried">tried</span> <span word="to">to</span> <span word="use">use</span> <span word="it">it</span> <span word="as">as</span> <span word="a">a</span> <span word="trigger">trigger</span>. <span word="But">But</span> <span word="few">few</span> <span word="compounds">compounds</span> (化合物) <span word="absorb">absorb</span> <span word="NIR">NIR</span> <span word="well">well</span> <span word="and">and</span> <span word="go">go</span> <span word="through">through</span> <span word="chemical">chemical</span> <span word="changes">changes</span>.</p><p> <span word="That">That</span> <span word="changed">changed</span> <span word="last">last</span> <span word="year">year</span> <span word="when">when</span> <span word="Adah">Adah</span> <span word="Almutairi">Almutairi</span>, <span word="a">a</span> <span word="chemist">chemist</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="California">California</span>, <span word="San">San</span> <span word="Diego">Diego</span>, <span word="reported">reported</span> <span word="that">that</span> <span word="she">she</span> <span word="and">and</span> <span word="her">her</span> <span word="colleagues">colleagues</span> <span word="had">had</span> <span word="designed">designed</span> <span word="a">a</span> <span word="polymer">polymer</span> <span word="that">that</span> <span word="breaks">breaks</span> <span word="down">down</span> <span word="when">when</span> <span word="it">it</span> <span word="absorbs">absorbs</span> <span word="NIR">NIR</span> <span word="light">light</span>. <span word="Their">Their</span> <span word="polymer">polymer</span> <span word="used">used</span> <span word="a">a</span> <span word="commercially">commercially</span> <span word="available">available</span> <span word="NIR">NIR</span><span word="absorbing">absorbing</span> <span word="group">group</span> <span word="called">called</span></p>
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