TPO托福阅读真题答案及解析(1)
<p> <span word="TPO">TPO</span>托福阅读真题答案及解析：托福阅读文段的结构和出题点都有一定的规律，比如说托福阅读文段一般是总分总的格式，考生重点关注首段，尾段，转折 句，开头句，基本上就能找到主题句，从这个方面来说，练习托福阅读真题，从中总结托福阅读考试经验是十分必要的，下面新东方网为大家整理一份<span word="TPO">TPO</span>托福 阅读真题答案及解析，希望对大家有所帮助。</p><p> 托福阅读真题：</p><p> <span word="The">The</span> <span word="Long">Long</span>-<span word="Term">Term</span> <span word="Stability">Stability</span> <span word="of">of</span> <span word="Ecosystems">Ecosystems</span></p><p> <span word="Plant">Plant</span> <span word="communities">communities</span> <span word="assemble">assemble</span> <span word="themselves">themselves</span> <span word="flexibly">flexibly</span>, <span word="and">and</span> <span word="their">their</span> <span word="particular">particular</span> <span word="structure">structure</span> <span word="depends">depends</span> <span word="on">on</span> <span word="the">the</span> <span word="specific">specific</span> <span word="history">history</span> <span word="of">of</span> <span word="the">the</span> <span word="area">area</span>. <span word="Ecologists">Ecologists</span> <span word="use">use</span> <span word="the">the</span> <span word="term">term</span> <span word="succession">succession</span> <span word="to">to</span> <span word="refer">refer</span> <span word="to">to</span> <span word="the">the</span> <span word="changes">changes</span> <span word="that">that</span> <span word="happen">happen</span> <span word="in">in</span> <span word="plant">plant</span> <span word="communities">communities</span> <span word="and">and</span> <span word="ecosystems">ecosystems</span> <span word="over">over</span> <span word="time">time</span>. <span word="The">The</span> <span word="first">first</span> <span word="community">community</span> <span word="in">in</span> <span word="a">a</span> <span word="succession">succession</span> <span word="is">is</span> <span word="called">called</span> <span word="a">a</span> <span word="pioneer">pioneer</span> <span word="community">community</span>, <span word="while">while</span> <span word="the">the</span> <span word="long">long</span>-<span word="lived">lived</span> <span word="community">community</span> <span word="at">at</span> <span word="the">the</span> <span word="end">end</span> <span word="of">of</span> <span word="succession">succession</span> <span word="is">is</span> <span word="called">called</span> <span word="a">a</span> <span word="climax">climax</span> <span word="community">community</span>. <span word="Pioneer">Pioneer</span> <span word="and">and</span> <span word="successional">successional</span> <span word="plant">plant</span> <span word="communities">communities</span> <span word="are">are</span> <span word="said">said</span> <span word="to">to</span> <span word="change">change</span> <span word="over">over</span> <span word="periods">periods</span> <span word="from">from</span> 1 <span word="to">to</span> 500 <span word="years">years</span>. <span word="These">These</span> <span word="changesin">changesin</span> <span word="plant">plant</span> <span word="numbers">numbers</span> <span word="and">and</span> <span word="the">the</span> <span word="mix">mix</span> <span word="of">of</span> <span word="speciesare">speciesare</span> <span word="cumulative">cumulative</span>. <span word="Climax">Climax</span> <span word="communities">communities</span> <span word="themselves">themselves</span> <span word="change">change</span> <span word="but">but</span> <span word="over">over</span> <span word="periods">periods</span> <span word="of">of</span> <span word="time">time</span> <span word="greater">greater</span> <span word="than">than</span> <span word="about">about</span> 500 <span word="years">years</span>.</p><p> <span word="An">An</span> <span word="ecologist">ecologist</span> <span word="who">who</span> <span word="studies">studies</span> <span word="a">a</span> <span word="pond">pond</span> <span word="today">today</span> <span word="may">may</span> <span word="well">well</span> <span word="find">find</span> <span word="it">it</span> <span word="relatively">relatively</span> <span word="unchanged">unchanged</span> <span word="in">in</span> <span word="a">a</span> <span word="years">years</span> <span word="time">time</span>. <span word="Individual">Individual</span> <span word="fish">fish</span> <span word="may">may</span> <span word="be">be</span> <span word="replaced">replaced</span>, <span word="but">but</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="fish">fish</span> <span word="will">will</span> <span word="tend">tend</span> <span word="to">to</span> <span word="be">be</span> <span word="the">the</span> <span word="same">same</span> <span word="from">from</span> <span word="one">one</span> <span word="year">year</span> <span word="to">to</span> <span word="the">the</span> <span word="next">next</span>. <span word="We">We</span> <span word="can">can</span> <span word="say">say</span> <span word="that">that</span> <span word="the">the</span> <span word="properties">properties</span> <span word="of">of</span> <span word="an">an</span> <span word="ecosystem">ecosystem</span> <span word="are">are</span> <span word="more">more</span> <span word="stable">stable</span> <span word="than">than</span> <span word="the">the</span> <span word="individual">individual</span> <span word="organisms">organisms</span> <span word="that">that</span> <span word="compose">compose</span> <span word="the">the</span> <span word="ecosystem">ecosystem</span>.</p>
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