gre阅读练习每日一篇(四十四)
<p> 掌握了<span word="gre">gre</span>阅读里的长难句，到了实战演习的时候了。<span word="gre">gre</span>阅读练习每日一篇帮助<span word="gre">gre</span>考生循序渐进地进行练习和总结。希望<span word="gre">gre</span>考生在进行<span word="gre">gre</span>阅读练习时，也按着考试时候的时间规定自己的练习，这样才能有效果。</p><p> <span word="Since">Since</span> <span word="the">the</span> <span word="Hawaiian">Hawaiian</span> <span word="Islands">Islands</span> <span word="have">have</span> <span word="never">never</span> <span word="been">been</span> <span word="connected">connected</span> <span word="to">to</span> <span word="other">other</span> <span word="land">land</span> <span word="masses">masses</span>, <span word="the">the</span> <span word="great">great</span> <span word="variety">variety</span> <span word="of">of</span> <span word="plants">plants</span> <span word="in">in</span> <span word="Hawaii">Hawaii</span> <span word="must">must</span> <span word="be">be</span> <span word="a">a</span> <span word="result">result</span> <span word="of">of</span> <span word="the">the</span> <span word="long">long</span>-<span word="distance">distance</span> <span word="dispersal">dispersal</span> <span word="of">of</span> <span word="seeds">seeds</span>, <span word="a">a</span> <span word="process">process</span> <span word="that">that</span> <span word="requires">requires</span> <span word="both">both</span> <span word="a">a</span> <span word="method">method</span> <span word="of">of</span> <span word="transport">transport</span> <span word="and">and</span> <span word="an">an</span> <span word="equivalence">equivalence</span> <span word="between">between</span> <span word="the">the</span> <span word="ecology">ecology</span> <span word="of">of</span> <span word="the">the</span> <span word="source">source</span> <span word="area">area</span> <span word="and">and</span> <span word="that">that</span> <span word="of">of</span> <span word="the">the</span> <span word="recipient">recipient</span> <span word="area">area</span>.</p><p> <span word="There">There</span> <span word="is">is</span> <span word="some">some</span> <span word="dispute">dispute</span> <span word="about">about</span> <span word="the">the</span> <span word="method">method</span> <span word="of">of</span> <span word="transport">transport</span> <span word="involved">involved</span>. <span word="Some">Some</span> <span word="biologists">biologists</span> <span word="argue">argue</span> <span word="that">that</span> <span word="ocean">ocean</span> <span word="and">and</span> <span word="air">air</span> <span word="currents">currents</span> <span word="are">are</span> <span word="responsible">responsible</span> <span word="for">for</span> <span word="the">the</span> <span word="transport">transport</span> <span word="of">of</span> <span word="plant">plant</span> <span word="seeds">seeds</span> <span word="to">to</span> <span word="Hawaii">Hawaii</span>. <span word="Yet">Yet</span> <span word="the">the</span> <span word="results">results</span> <span word="of">of</span> <span word="flotation">flotation</span> <span word="experiments">experiments</span> <span word="and">and</span> <span word="the">the</span> <span word="low">low</span> <span word="temperatures">temperatures</span> <span word="of">of</span> <span word="air">air</span> <span word="currents">currents</span> <span word="cast">cast</span> <span word="doubt">doubt</span> <span word="on">on</span> <span word="these">these</span> <span word="hypotheses">hypotheses</span>. <span word="More">More</span> <span word="probable">probable</span> <span word="is">is</span> <span word="bird">bird</span> <span word="transport">transport</span>, <span word="either">either</span> <span word="externally">externally</span>, <span word="by">by</span> <span word="accidental">accidental</span> <span word="attachment">attachment</span> <span word="of">of</span> <span word="the">the</span> <span word="seeds">seeds</span> <span word="to">to</span> <span word="feathers">feathers</span>, <span word="or">or</span> <span word="internally">internally</span>, <span word="by">by</span> <span word="the">the</span> <span word="swallowing">swallowing</span> <span word="of">of</span> <span word="fruit">fruit</span> <span word="and">and</span> <span word="subsequent">subsequent</span> <span word="excretion">excretion</span> <span word="of">of</span> <span word="the">the</span> <span word="seeds">seeds</span>. <span word="While">While</span> <span word="it">it</span> <span word="is">is</span> <span word="likely">likely</span> <span word="that">that</span> <span word="fewer">fewer</span> <span word="varieties">varieties</span> <span word="of">of</span> <span word="plant">plant</span> <span word="seeds">seeds</span> <span word="have">have</span> <span word="reached">reached</span> <span word="Hawaii">Hawaii</span> <span word="externally">externally</span> <span word="than">than</span> <span word="internally">internally</span>, <span word="more">more</span> <span word="varieties">varieties</span> <span word="are">are</span> <span word="known">known</span> <span word="to">to</span> <span word="be">be</span> <span word="adapted">adapted</span> <span word="to">to</span> <span word="external">external</span> <span word="than">than</span> <span word="to">to</span> <span word="internal">internal</span> <span word="transport">transport</span>.</p><p> 17. <span word="The">The</span> <span word="author">author</span> <span word="of">of</span> <span word="the">the</span> <span word="passage">passage</span> <span word="is">is</span> <span word="primarily">primarily</span> <span word="concerned">concerned</span> <span word="with">with</span></p><p> <span word="discussing">discussing</span> <span word="different">different</span> <span word="approaches">approaches</span> <span word="biologists">biologists</span> <span word="have">have</span> <span word="taken">taken</span> <span word="to">to</span> <span word="testing">testing</span> <span word="theories">theories</span> <span word="about">about</span> <span word="the">the</span> <span word="distribution">distribution</span> <span word="of">of</span> <span word="plants">plants</span> <span word="in">in</span> <span word="Hawaii">Hawaii</span></p>
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