2015职称英语理工类考试阅读理解文章及练习Plant Gas：练习
<p> 练习：</p><p> 1.<span word="that">that</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>?</p><p> <span word="A">A</span>)<span word="It">It</span> <span word="was">was</span> <span word="produced">produced</span> <span word="from">from</span> <span word="plants">plants</span>.</p><p> <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>.</p><p> <span word="C">C</span>)<span word="It">It</span> <span word="was">was</span> <span word="produced">produced</span> <span word="in">in</span> <span word="oxygen">oxygen</span>-<span word="free">free</span> <span word="environments">environments</span>.</p><p> <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>.</p><p> 2.<span word="To">To</span> <span word="test">test</span> <span word="whether">whether</span> <span word="plants">plants</span> <span word="are">are</span> <span word="a">a</span> <span word="source">source</span> <span word="of">of</span> <span word="methanethe">methanethe</span> <span word="scientists">scientists</span> <span word="created">created</span></p><p> <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>.</p><p> <span word="B">B</span>)<span word="an">an</span> <span word="environment">environment</span> <span word="with">with</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="as">as</span> <span word="the">the</span> <span word="Earth">Earth</span> <span word="has">has</span>.</p><p> <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>.</p><p> <span word="D">D</span>)<span word="an">an</span> <span word="environment">environment</span> <span word="filled">filled</span> <span word="with">with</span> <span word="the">the</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span></p><p> 3.<span word="hich">hich</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>?</p><p> <span word="A">A</span>)<span word="The">The</span> <span word="lower">lower</span> <span word="the">the</span> <span word="temperaturethe">temperaturethe</span> <span word="higher">higher</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>.</p><p> <span word="B">B</span>)<span word="Living">Living</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>.</p><p> <span word="C">C</span>)<span word="When">When</span> <span word="exposed">exposed</span> <span word="to">to</span> <span word="sunlightplants">sunlightplants</span> <span word="stop">stop</span> <span word="releasing">releasing</span> <span word="methane">methane</span>.</p><p> <span word="D">D</span>)<span word="The">The</span> <span word="higher">higher</span> <span word="the">the</span> <span word="temperaturethe">temperaturethe</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>.</p><p> 4.<span word="What">What</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span> <span word="about">about</span> <span word="methane">methane</span> <span word="is">is</span> <span word="Not">Not</span> <span word="mentioned">mentioned</span> <span word="in">in</span> <span word="the">the</span> <span word="passage">passage</span> ?</p><p> <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>.</p><p> <span word="B">B</span>)<span word="Plants">Plants</span> <span word="growing">growing</span> <span word="in">in</span> <span word="water">water</span> <span word="release">release</span> <span word="methane">methane</span>.</p><p> <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>.</p><p> <span word="D">D</span>)<span word="Microbes">Microbes</span> <span word="in">in</span> <span word="plants">plants</span> <span word="produce">produce</span> <span word="methane">methane</span>.</p>
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