GRE阅读高频机经原文及试题：蝴蝶产卵（逻辑）
<p> 24. 蝴蝶产卵</p><p> <span word="Upon">Upon</span> <span word="maturity">maturity</span>,<span word="monarch">monarch</span> <span word="butterflies">butterflies</span> <span word="travel">travel</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="miles">miles</span> <span word="from">from</span> <span word="their">their</span> <span word="places">places</span> <span word="of">of</span> <span word="origin">origin</span> <span word="and">and</span> <span word="lay">lay</span> <span word="their">their</span> <span word="eggs">eggs</span> <span word="on">on</span> <span word="milkweed">milkweed</span>. <span word="The">The</span> <span word="caterpillars">caterpillars</span> <span word="that">that</span> <span word="emerge">emerge</span> <span word="feed">feed</span> <span word="on">on</span> <span word="milkweed">milkweed</span> <span word="and">and</span> <span word="absorb">absorb</span> <span word="the">the</span> <span word="glycosides">glycosides</span> <span word="in">in</span> <span word="milkweed">milkweed</span> <span word="sap">sap</span>. <span word="The">The</span> <span word="specific">specific</span> <span word="glycosides">glycosides</span> <span word="present">present</span> <span word="in">in</span> <span word="milkweed">milkweed</span> <span word="differ">differ</span> <span word="from">from</span> <span word="region">region</span> <span word="to">to</span> <span word="region">region</span> <span word="within">within</span> <span word="the">the</span> <span word="monarch">monarch</span> <span word="butterflys">butterflys</span> <span word="range">range</span>. <span word="Mature">Mature</span> <span word="butterflies">butterflies</span> <span word="retain">retain</span> <span word="the">the</span> <span word="glycosides">glycosides</span> <span word="in">in</span> <span word="a">a</span> <span word="mature">mature</span> <span word="monarch">monarch</span> <span word="butterfly">butterfly</span> <span word="could">could</span> <span word="be">be</span> <span word="used">used</span> <span word="to">to</span> <span word="determine">determine</span> <span word="its">its</span> <span word="place">place</span> <span word="of">of</span> <span word="origin">origin</span>.</p><p> <span word="Which">Which</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span>, <span word="if">if</span> <span word="true">true</span>, <span word="most">most</span> <span word="strengthens">strengthens</span> <span word="the">the</span> <span word="argument">argument</span>?</p><p> <span word="A">A</span>. <span word="Mature">Mature</span> <span word="monarch">monarch</span> <span word="butterflies">butterflies</span> <span word="do">do</span> <span word="not">not</span> <span word="feed">feed</span> <span word="on">on</span> <span word="parts">parts</span> <span word="of">of</span> <span word="milkweed">milkweed</span> <span word="that">that</span> <span word="contain">contain</span> <span word="glycosides">glycosides</span>.</p><p> <span word="B">B</span>. <span word="The">The</span> <span word="glycosides">glycosides</span> <span word="in">in</span> <span word="milkweed">milkweed</span> <span word="sap">sap</span> <span word="are">are</span> <span word="slightly">slightly</span> <span word="toxic">toxic</span> <span word="to">to</span> <span word="caterpillars">caterpillars</span> <span word="of">of</span> <span word="other">other</span> <span word="species">species</span>.</p><p> <span word="C">C</span>. <span word="The">The</span> <span word="vast">vast</span> <span word="majority">majority</span> <span word="of">of</span> <span word="the">the</span> <span word="monarch">monarch</span> <span word="butterflies">butterflies</span> <span word="that">that</span> <span word="are">are</span> <span word="laying">laying</span> <span word="eggs">eggs</span> <span word="in">in</span> <span word="a">a</span> <span word="given">given</span> <span word="region">region</span> <span word="will">will</span> <span word="have">have</span> <span word="traveled">traveled</span> <span word="there">there</span> <span word="from">from</span> <span word="a">a</span> <span word="single">single</span> <span word="region">region</span>.</p><p> <span word="D">D</span>. <span word="There">There</span> <span word="are">are</span> <span word="substances">substances</span> <span word="other">other</span> <span word="than">than</span> <span word="glycosides">glycosides</span> <span word="in">in</span> <span word="milkweed">milkweed</span> <span word="sap">sap</span> <span word="that">that</span> <span word="accumulate">accumulate</span> <span word="in">in</span> <span word="a">a</span> <span word="monarch">monarch</span> <span word="caterpillar">caterpillar</span> <span word="and">and</span> <span word="are">are</span> <span word="retained">retained</span> <span word="in">in</span> <span word="the">the</span> <span word="body">body</span> <span word="of">of</span> <span word="the">the</span> <span word="mature">mature</span> <span word="butterfly">butterfly</span>.</p><p> <span word="E">E</span>. <span word="There">There</span> <span word="are">are</span> <span word="certain">certain</span> <span word="glycosides">glycosides</span> <span word="that">that</span> <span word="are">are</span> <span word="found">found</span> <span word="in">in</span> <span word="the">the</span> <span word="sap">sap</span> <span word="of">of</span> <span word="all">all</span> <span word="milkweeds">milkweeds</span>, <span word="no">no</span> <span word="matter">matter</span> <span word="where">where</span> <span word="they">they</span> <span word="grow">grow</span> <span word="within">within</span> <span word="the">the</span> <span word="monarch">monarch</span> <span word="butterflys">butterflys</span> <span word="range">range</span>.</p><p> </p>
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