英语六级考试快读阅读练习及答案（8）
<p> <span word="Our">Our</span> <span word="Endangered">Endangered</span> <span word="Oceans">Oceans</span></p><p> <span word="Before">Before</span> <span word="anyone">anyone</span> <span word="can">can</span> <span word="honestly">honestly</span> <span word="care">care</span> <span word="how">how</span> <span word="important">important</span> <span word="it">it</span> <span word="is">is</span> <span word="to">to</span> <span word="protect">protect</span> <span word="marine">marine</span> <span word="habitats">habitats</span>(生活环境), <span word="one">one</span> <span word="needs">needs</span> <span word="to">to</span> <span word="appreciate">appreciate</span> <span word="the">the</span> <span word="vast">vast</span> <span word="quantities">quantities</span> <span word="of">of</span> <span word="marine">marine</span> <span word="life">life</span> <span word="that">that</span> <span word="exists">exists</span> <span word="in">in</span> <span word="the">the</span> <span word="ocean">ocean</span>. <span word="It">It</span> <span word="is">is</span> <span word="hard">hard</span> <span word="for">for</span> <span word="some">some</span> <span word="people">people</span> <span word="to">to</span> <span word="relate">relate</span> <span word="to">to</span> <span word="something">something</span> <span word="they">they</span> <span word="never">never</span> <span word="see">see</span>. <span word="However">However</span>, <span word="it">it</span> <span word="makes">makes</span> <span word="sense">sense</span> <span word="that">that</span> <span word="the">the</span> <span word="vast">vast</span> <span word="expanse">expanse</span> <span word="of">of</span> <span word="water">water</span> <span word="and">and</span> <span word="its">its</span> <span word="inhabitants">inhabitants</span>, <span word="covering">covering</span> 70% <span word="of">of</span> <span word="the">the</span> <span word="planet">planet</span>, <span word="affects">affects</span> <span word="us">us</span> <span word="all">all</span>.</p><p> <span word="Most">Most</span> <span word="marine">marine</span> <span word="animals">animals</span> <span word="are">are</span> <span word="found">found</span> <span word="near">near</span> <span word="coral">coral</span> <span word="reefs">reefs</span>. <span word="These">These</span> <span word="colorful">colorful</span> <span word="underwater">underwater</span> <span word="forests">forests</span> <span word="naturally">naturally</span> <span word="spring">spring</span> <span word="to">to</span> <span word="mind">mind</span> <span word="with">with</span> <span word="the">the</span> <span word="mention">mention</span> <span word="of">of</span> <span word="scuba">scuba</span>(水中呼吸器)<span word="diving">diving</span> <span word="or">or</span> <span word="underwater">underwater</span> <span word="life">life</span>. <span word="Coral">Coral</span> <span word="reefs">reefs</span> <span word="are">are</span> <span word="constructed">constructed</span> <span word="by">by</span> <span word="living">living</span> <span word="plants">plants</span> <span word="and">and</span> <span word="animals">animals</span>, <span word="primarily">primarily</span> <span word="corals">corals</span> <span word="that">that</span> <span word="surround">surround</span> <span word="their">their</span> <span word="small">small</span> <span word="anemone">anemone</span> -<span word="like">like</span> <span word="tentacles">tentacles</span> <span word="in">in</span> <span word="a">a</span> <span word="hard">hard</span> <span word="skeleton">skeleton</span> <span word="that">that</span> <span word="forms">forms</span> <span word="much">much</span> <span word="of">of</span> <span word="the">the</span> <span word="reef">reef</span> <span word="structure">structure</span>.</p><p> <span word="They">They</span> <span word="generally">generally</span> <span word="occur">occur</span> <span word="in">in</span> <span word="clear">clear</span>, <span word="tropical">tropical</span> <span word="or">or</span> <span word="semi">semi</span>-<span word="tropical">tropical</span> <span word="seas">seas</span> <span word="to">to</span> <span word="a">a</span> <span word="depth">depth</span> <span word="of">of</span> <span word="approximately">approximately</span> 100 <span word="meters">meters</span> . <span word="Coral">Coral</span> <span word="reefs">reefs</span> <span word="fringe">fringe</span> <span word="approximately">approximately</span> <span word="one">one</span> <span word="sixth">sixth</span> <span word="of">of</span> <span word="the">the</span> <span word="worlds">worlds</span> <span word="coastlines">coastlines</span> <span word="and">and</span> <span word="are">are</span> <span word="the">the</span> <span word="biologically">biologically</span> <span word="richest">richest</span> <span word="of">of</span> <span word="all">all</span> <span word="shallow">shallow</span>-<span word="water">water</span> <span word="marine">marine</span> <span word="ecosystems">ecosystems</span>. <span word="They">They</span> <span word="support">support</span> <span word="as">as</span> <span word="many">many</span> <span word="as">as</span> 1 <span word="million">million</span> <span word="species">species</span> <span word="of">of</span> <span word="animals">animals</span> <span word="and">and</span> <span word="plants">plants</span>, <span word="but">but</span> <span word="only">only</span> <span word="a">a</span> <span word="small">small</span> <span word="fraction">fraction</span> <span word="have">have</span> <span word="been">been</span> <span word="described">described</span>. <span word="Among">Among</span> <span word="the">the</span> <span word="best">best</span> <span word="known">known</span> <span word="groups">groups</span> <span word="are">are</span> <span word="at">at</span> <span word="least">least</span> 5,000 <span word="species">species</span> <span word="of">of</span> <span word="fish">fish</span>, <span word="over">over</span> 10,000 <span word="species">species</span> <span word="of">of</span> <span word="mollusk">mollusk</span> <span word="and">and</span> <span word="more">more</span> <span word="than">than</span> 800 <span word="species">species</span> <span word="of">of</span> <span word="reef">reef</span>-<span word="building">building</span> <span word="corals">corals</span>.</p><p> <span word="Corals">Corals</span> <span word="are">are</span> <span word="not">not</span> <span word="only">only</span> <span word="important">important</span> <span word="to">to</span> <span word="fish">fish</span>. <span word="Reefs">Reefs</span> <span word="are">are</span> <span word="important">important</span> <span word="to">to</span> <span word="the">the</span> <span word="human">human</span> <span word="population">population</span> <span word="for">for</span> <span word="a">a</span> <span word="wide">wide</span> <span word="variety">variety</span> <span word="or">or</span> <span word="reasons">reasons</span>: <span word="for">for</span> <span word="one">one</span>, <span word="they">they</span> <span word="are">are</span> <span word="a">a</span> <span word="food">food</span> <span word="source">source</span>. <span word="A">A</span> <span word="majority">majority</span> <span word="of">of</span> <span word="people">people</span> <span word="make">make</span> <span word="their">their</span> <span word="living">living</span> <span word="fishing">fishing</span> <span word="near">near</span> <span word="coral">coral</span> <span word="reefs">reefs</span> <span word="and">and</span> <span word="an">an</span> <span word="even">even</span> <span word="larger">larger</span> <span word="part">part</span> <span word="of">of</span> <span word="population">population</span> <span word="enjoys">enjoys</span> <span word="eating">eating</span> <span word="some">some</span> <span word="of">of</span> <span word="the">the</span> <span word="catch">catch</span>. <span word="Unfortunately">Unfortunately</span>, <span word="if">if</span> <span word="current">current</span> <span word="trends">trends</span> <span word="of">of</span> <span word="over">over</span>-<span word="fishing">fishing</span> <span word="continue">continue</span>, <span word="and">and</span> <span word="we">we</span> <span word="deplete">deplete</span> <span word="fisheries">fisheries</span> <span word="as">as</span> <span word="fast">fast</span> <span word="as">as</span> <span word="we">we</span> <span word="are">are</span>, <span word="then">then</span> <span word="this">this</span> <span word="food">food</span> <span word="source">source</span> <span word="will">will</span> <span word="eventually">eventually</span> <span word="run">run</span> <span word="out">out</span>. <span word="Scientific">Scientific</span> <span word="evidence">evidence</span> <span word="shows">shows</span> <span word="that">that</span> 90% <span word="of">of</span> <span word="top">top</span> <span word="predators">predators</span> <span word="in">in</span> <span word="the">the</span> <span word="ocean">ocean</span> <span word="are">are</span> <span word="now">now</span> <span word="extinct">extinct</span> <span word="because">because</span> <span word="of">of</span> <span word="over">over</span>-<span word="fishing">fishing</span>-<span word="predatory">predatory</span> <span word="fish">fish</span> <span word="include">include</span> <span word="anything">anything</span> <span word="salmon">salmon</span> <span word="sized">sized</span> <span word="and">and</span> <span word="above">above</span> <span word="all">all</span> <span word="the">the</span> <span word="way">way</span> <span word="through">through</span> <span word="sharks">sharks</span>. <span word="On">On</span> <span word="the">the</span> <span word="other">other</span> <span word="hand">hand</span>, <span word="killing">killing</span> <span word="off">off</span> <span word="the">the</span> <span word="grazing">grazing</span> <span word="species">species</span> <span word="of">of</span> <span word="fish">fish</span> <span word="at">at</span> <span word="reefs">reefs</span> <span word="allows">allows</span> <span word="algae">algae</span> <span word="to">to</span> <span word="build">build</span> <span word="up">up</span>, <span word="which">which</span> <span word="in">in</span> <span word="turn">turn</span> <span word="kills">kills</span> <span word="the">the</span> <span word="coral">coral</span>. <span word="With">With</span> 30% <span word="of">of</span> <span word="oceanic">oceanic</span> <span word="fish">fish</span> <span word="making">making</span> <span word="their">their</span> <span word="home">home</span> <span word="near">near</span> <span word="coral">coral</span> <span word="reefs">reefs</span> <span word="at">at</span> <span word="one">one</span> <span word="time">time</span> <span word="or">or</span> <span word="another">another</span>, <span word="reefs">reefs</span> <span word="are">are</span> <span word="essential">essential</span> <span word="in">in</span> <span word="maintaining">maintaining</span> <span word="a">a</span> <span word="healthy">healthy</span> <span word="fish">fish</span> <span word="population">population</span> <span word="and">and</span> <span word="many">many</span> <span word="of">of</span> <span word="the">the</span> <span word="fish">fish</span> <span word="maintain">maintain</span> <span word="the">the</span> <span word="coral">coral</span> <span word="in">in</span> <span word="return">return</span>. <span word="Sustainable">Sustainable</span> <span word="fishing">fishing</span> <span word="is">is</span> <span word="a">a</span> <span word="must">must</span>.</p>
页:
[1]