SAT阅读练习题之CDs
<p> 下面是一篇关于<span word="Popular">Popular</span> <span word="Culture">Culture</span>的<span word="SAT">SAT</span>阅读练习题，后面有相关的题目和答案解析。<span word="SAT">SAT</span>阅读考试中的文章阅读一般都是考试的难点，需要大家经过一定时间的练习才能掌握。下面大家就一起来做一下这些题目吧。</p><p> <span word="Questions">Questions</span> 13 <span word="are">are</span> <span word="based">based</span> <span word="on">on</span> <span word="the">the</span> <span word="following">following</span> <span word="passage">passage</span>.</p><p> <span word="The">The</span> <span word="following">following</span> <span word="selection">selection</span> <span word="is">is</span> <span word="about">about</span> <span word="the">the</span> <span word="invention">invention</span> <span word="of">of</span> <span word="the">the</span> <span word="compact">compact</span> <span word="disc">disc</span>, <span word="and">and</span> <span word="explains">explains</span> <span word="how">how</span> <span word="it">it</span> <span word="works">works</span>.</p><p> <span word="Compact">Compact</span> <span word="discs">discs</span> , <span word="which">which</span> <span word="may">may</span> <span word="be">be</span> <span word="found">found</span> <span word="in">in</span> <span word="over">over</span> 25 <span word="million">million</span> <span word="American">American</span> <span word="homes">homes</span>, <span word="not">not</span> <span word="to">to</span> <span word="mention">mention</span> <span word="backpacks">backpacks</span> <span word="and">and</span> <span word="automobiles">automobiles</span>, <span word="first">first</span> <span word="entered">entered</span> <span word="popular">popular</span> <span word="culture">culture</span> <span word="in">in</span> <span word="the">the</span> 1980<span word="s">s</span>. <span word="But">But</span> <span word="their">their</span> <span word="history">history</span> <span word="goes">goes</span> <span word="back">back</span> <span word="to">to</span> <span word="the">the</span> 1960<span word="s">s</span>, <span word="when">when</span> <span word="an">an</span> <span word="inventor">inventor</span> <span word="named">named</span> <span word="James">James</span> <span word="Russell">Russell</span> <span word="decided">decided</span> <span word="to">to</span> <span word="create">create</span> <span word="an">an</span> <span word="alternative">alternative</span> <span word="to">to</span> <span word="his">his</span> <span word="scratched">scratched</span> <span word="and">and</span> <span word="warped">warped</span> <span word="phonograph">phonograph</span> <span word="recordsa">recordsa</span> <span word="system">system</span> <span word="that">that</span> <span word="could">could</span> <span word="record">record</span>, <span word="store">store</span>, <span word="and">and</span> <span word="replay">replay</span> <span word="music">music</span> <span word="without">without</span> <span word="ever">ever</span> <span word="wearing">wearing</span> <span word="out">out</span>.</p><p> <span word="The">The</span> <span word="result">result</span> <span word="was">was</span> <span word="the">the</span> <span word="compact">compact</span> <span word="disc">disc</span> . <span word="Made">Made</span> <span word="from">from</span> 1.2 <span word="mm">mm</span> <span word="of">of</span> <span word="polycarbonate">polycarbonate</span> <span word="plastic">plastic</span>, <span word="the">the</span> <span word="disc">disc</span> <span word="is">is</span> <span word="coated">coated</span> <span word="with">with</span> <span word="a">a</span> <span word="much">much</span> <span word="thinner">thinner</span> <span word="aluminum">aluminum</span> <span word="layer">layer</span> <span word="that">that</span> <span word="is">is</span> <span word="then">then</span> <span word="protected">protected</span> <span word="with">with</span> <span word="a">a</span> <span word="film">film</span> <span word="of">of</span> <span word="lacquer">lacquer</span>. <span word="The">The</span> <span word="lacquer">lacquer</span> <span word="layer">layer</span> <span word="can">can</span> <span word="be">be</span> <span word="printed">printed</span> <span word="with">with</span> <span word="a">a</span> <span word="label">label</span>. <span word="CDs">CDs</span> <span word="are">are</span> <span word="typically">typically</span> 120 <span word="mm">mm</span> <span word="in">in</span> <span word="diameter">diameter</span>, <span word="and">and</span> <span word="can">can</span> <span word="store">store</span> <span word="about">about</span> 74 <span word="minutes">minutes</span> <span word="of">of</span> <span word="music">music</span>. <span word="There">There</span> <span word="are">are</span> <span word="also">also</span> <span word="discs">discs</span> <span word="that">that</span> <span word="can">can</span> <span word="store">store</span> 80, 90, 99, <span word="and">and</span> 100 <span word="minutes">minutes</span> <span word="of">of</span> <span word="music">music</span>, <span word="but">but</span> <span word="they">they</span> <span word="are">are</span> <span word="not">not</span> <span word="as">as</span> <span word="compatible">compatible</span> <span word="with">with</span> <span word="various">various</span> <span word="stereos">stereos</span> <span word="and">and</span> <span word="computers">computers</span> <span word="as">as</span> <span word="the">the</span> 74<span word="minute">minute</span> <span word="size">size</span>.</p><p> <span word="The">The</span> <span word="information">information</span> <span word="on">on</span> <span word="a">a</span> <span word="standard">standard</span> <span word="CD">CD</span> <span word="is">is</span> <span word="contained">contained</span> <span word="on">on</span> <span word="the">the</span> <span word="polycarbonate">polycarbonate</span> <span word="layer">layer</span>, <span word="as">as</span> <span word="a">a</span> <span word="single">single</span> <span word="spiral">spiral</span> <span word="track">track</span> <span word="of">of</span> <span word="pits">pits</span>, <span word="starting">starting</span> <span word="at">at</span> <span word="the">the</span> <span word="inside">inside</span> <span word="of">of</span> <span word="the">the</span> <span word="disk">disk</span> <span word="and">and</span> <span word="circling">circling</span> <span word="its">its</span> <span word="way">way</span> <span word="to">to</span> <span word="the">the</span> <span word="outside">outside</span>. <span word="This">This</span> <span word="information">information</span> <span word="is">is</span> <span word="read">read</span> <span word="by">by</span> <span word="shining">shining</span> <span word="light">light</span> <span word="from">from</span> <span word="a">a</span> 780 <span word="nm">nm</span> <span word="wavelength">wavelength</span> <span word="semiconductor">semiconductor</span> <span word="laser">laser</span> <span word="through">through</span> <span word="the">the</span> <span word="bottom">bottom</span> <span word="of">of</span> <span word="the">the</span> <span word="polycarbonate">polycarbonate</span> <span word="layer">layer</span>. <span word="The">The</span> <span word="light">light</span> <span word="from">from</span> <span word="the">the</span> <span word="laser">laser</span> <span word="follows">follows</span> <span word="the">the</span> <span word="spiral">spiral</span> <span word="track">track</span> <span word="of">of</span> <span word="pits">pits</span>, <span word="and">and</span> <span word="is">is</span> <span word="then">then</span> <span word="reflected">reflected</span> <span word="off">off</span> <span word="either">either</span> <span word="the">the</span> <span word="pit">pit</span> <span word="or">or</span> <span word="the">the</span> <span word="aluminum">aluminum</span> <span word="layer">layer</span>. <span word="Because">Because</span> <span word="the">the</span> <span word="CD">CD</span> <span word="is">is</span> <span word="read">read</span> <span word="through">through</span> <span word="the">the</span> <span word="bottom">bottom</span> <span word="of">of</span> <span word="the">the</span> <span word="disc">disc</span>, <span word="each">each</span> <span word="pit">pit</span> <span word="looks">looks</span> <span word="like">like</span> <span word="a">a</span> <span word="bump">bump</span> <span word="to">to</span> <span word="the">the</span> <span word="laser">laser</span>.</p>
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