职称英语考试综合类经典阅读题(九)
<p> <span word="Plant">Plant</span> <span word="Gas">Gas</span> <span word="In">In</span> <span word="its">its</span> <span word="experiments">experiments</span>，<span word="Kepplers">Kepplers</span> <span word="team">team</span> <span word="used">used</span> <span word="sealed">sealed</span> <span word="chambers">chambers</span> <span word="that">that</span> <span word="contained">contained</span> <span word="the">the</span> <span word="same">same</span> <span word="concentration">concentration</span> <span word="of">of</span> <span word="oxygen">oxygen</span> <span word="that">that</span> <span word="Earths">Earths</span> <span word="atmosphere">atmosphere</span> <span word="has">has</span>.<span word="They">They</span> <span word="measured">measured</span> <span word="the">the</span> <span word="amounts">amounts</span> <span word="of">of</span> <span word="methane">methane</span> <span word="that">that</span> <span word="were">were</span> <span word="released">released</span> <span word="by">by</span> <span word="both">both</span> <span word="living">living</span> <span word="plants">plants</span>;<span word="and">and</span> <span word="dried">dried</span> <span word="plant">plant</span> <span word="material">material</span>，<span word="such">such</span> <span word="as">as</span> <span word="fallen">fallen</span> <span word="leaves">leaves</span>. <span word="Living">Living</span> <span word="plants">plants</span> <span word="growing">growing</span> <span word="at">at</span> <span word="their">their</span> <span word="normal">normal</span> <span word="temperatures">temperatures</span> <span word="released">released</span> <span word="as">as</span> <span word="much">much</span> <span word="as">as</span> 370 <span word="nanograms">nanograms</span> <span word="of">of</span> <span word="methane">methane</span> <span word="per">per</span> <span word="gram">gram</span> <span word="of">of</span> <span word="plant">plant</span> <span word="tissue">tissue</span> <span word="per">per</span> <span word="hour">hour</span>.<span word="Methane">Methane</span> <span word="emissions">emissions</span> <span word="tripled">tripled</span> <span word="when">when</span> <span word="living">living</span> <span word="and">and</span> <span word="dead">dead</span> <span word="plant">plant</span> <span word="was">was</span> <span word="exposed">exposed</span> <span word="to">to</span> <span word="sunlight">sunlight</span>. <span word="The">The</span> <span word="new">new</span> <span word="finding">finding</span> <span word="is">is</span> <span word="an">an</span> <span word="interesting">interesting</span> <span word="observation">observation</span>, <span word="says">says</span> <span word="Jennifer">Jennifer</span> <span word="Y">Y</span>.<span word="King">King</span>，<span word="a">a</span> <span word="biogeochemist">biogeochemist</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Minnesota">Minnesota</span> <span word="in">in</span> <span word="St">St</span>.<span word="Paul">Paul</span>3.<span word="Because">Because</span> <span word="some">some</span> <span word="types">types</span> <span word="of">of</span> <span word="soil">soil</span> <span word="microbes">microbes</span> <span word="consume">consume</span> <span word="methane">methane</span>，<span word="they">they</span> <span word="may">may</span> <span word="prevent">prevent</span> <span word="plant">plant</span>-<span word="produced">produced</span> <span word="methane">methane</span> <span word="from">from</span> <span word="reaching">reaching</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>.<span word="Field">Field</span> <span word="tests">tests</span> <span word="will">will</span> <span word="be">be</span> <span word="needed">needed</span> <span word="to">to</span> <span word="assess">assess</span> <span word="the">the</span> <span word="plants">plants</span> <span word="influence">influence</span>，<span word="she">she</span> <span word="notes">notes</span>. <span word="the">the</span> <span word="Max">Max</span> <span word="Planck">Planck</span> <span word="Institute">Institute</span> <span word="for">for</span> <span word="Nuclear">Nuclear</span> <span word="Physics">Physics</span> <span word="in">in</span> <span word="Heidelberg">Heidelberg</span>，<span word="Germany">Germany</span>：马克思普朗克核物理研究所，位于德国海德堡。海德堡系德国西南部城市，在巴登一符腾堡州的内卡河畔。海德堡大学是德国历史最悠久的大学。 <span word="St">St</span>.<span word="Paul">Paul</span>：圣保罗，美国明尼苏达州首府。 <span word="What">What</span> <span word="was">was</span> <span word="scientists">scientists</span> <span word="understanding">understanding</span> <span word="of">of</span> <span word="methane">methane</span>? <span word="B">B</span> <span word="It">It</span> <span word="was">was</span> <span word="not">not</span> <span word="a">a</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span>. <span word="D">D</span> <span word="It">It</span> <span word="traps">traps</span> <span word="more">more</span> <span word="heat">heat</span> <span word="than">than</span> <span word="any">any</span> <span word="other">other</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span>. <span word="A">A</span> <span word="a">a</span> <span word="oxygen">oxygen</span>-<span word="free">free</span> <span word="environment">environment</span>. <span word="C">C</span> <span word="a">a</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span>-<span word="free">free</span> <span word="environment">environment</span>. <span word="Which">Which</span> <span word="statement">statement</span> <span word="is">is</span> <span word="true">true</span> <span word="of">of</span> <span word="the">the</span> <span word="methane">methane</span> <span word="emissions">emissions</span> <span word="of">of</span> <span word="plants">plants</span> <span word="in">in</span> <span word="the">the</span> <span word="experiment">experiment</span>? <span word="B">B</span> <span word="I">I</span>.<span word="iving">iving</span> <span word="plants">plants</span> <span word="release">release</span> <span word="less">less</span> <span word="methane">methane</span> <span word="than">than</span> <span word="dried">dried</span> <span word="plants">plants</span> <span word="at">at</span> <span word="the">the</span> <span word="same">same</span> <span word="temperature">temperature</span>. <span word="D">D</span> <span word="The">The</span> <span word="higher">higher</span> <span word="the">the</span> <span word="temperature">temperature</span>，<span word="the">the</span> <span word="greater">greater</span> <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="methane">methane</span> <span word="emissions">emissions</span>. <span word="A">A</span> <span word="Plants">Plants</span> <span word="growing">growing</span> <span word="in">in</span> <span word="soil">soil</span> <span word="release">release</span> <span word="methane">methane</span>. <span word="C">C</span> <span word="Soil">Soil</span> <span word="microbes">microbes</span> <span word="consume">consume</span> <span word="methane">methane</span>. <span word="What">What</span> <span word="is">is</span> <span word="the">the</span> <span word="beneficial">beneficial</span> <span word="point">point</span> <span word="of">of</span> <span word="some">some</span> <span word="microbes">microbes</span> <span word="consuming">consuming</span> <span word="plant">plant</span>-<span word="produced">produced</span> <span word="methane">methane</span>? <span word="B">B</span> <span word="Methane">Methane</span> <span word="is">is</span> <span word="turned">turned</span> <span word="into">into</span> <span word="a">a</span> <span word="fertilizer">fertilizer</span>. <span word="D">D</span> <span word="Air">Air</span> <span word="becomes">becomes</span> <span word="cleaner">cleaner</span>.</p>
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