2017届高考英语一轮复习阅读理解解析版汇编：74（含解析）
<p> 2017高考英语阅读理解解析版汇编（74）</p><p> 阅读下列四篇短文，从每小题后所给的<span word="A">A</span>,<span word="B">B</span>,<span word="C">C</span>或<span word="D">D</span>四个选项中，选出最佳选项。</p><p> <span word="Rivers">Rivers</span> <span word="may">may</span> <span word="be">be</span> <span word="a">a</span> <span word="significant">significant</span> <span word="source">source</span> <span word="of">of</span> <span word="the">the</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> (一氧化二氮), <span word="scientists">scientists</span> <span word="now">now</span> <span word="find">find</span>.</p><p> <span word="Their">Their</span> <span word="calculation">calculation</span> <span word="suggests">suggests</span> <span word="that">that</span> <span word="across">across</span> <span word="the">the</span> <span word="globe">globe</span> <span word="the">the</span> <span word="waterways">waterways</span> <span word="contribute">contribute</span> <span word="three">three</span> <span word="times">times</span> <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="to">to</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span> <span word="as">as</span> <span word="had">had</span> <span word="been">been</span> <span word="estimated">estimated</span> <span word="by">by</span> <span word="the">the</span> <span word="International">International</span> <span word="Panel">Panel</span> <span word="on">on</span> <span word="Climate">Climate</span> <span word="Change">Change</span> (<span word="IPCC">IPCC</span>), <span word="the">the</span> <span word="United">United</span> <span word="Nations">Nations</span> <span word="scientific">scientific</span> <span word="body">body</span> <span word="charged">charged</span> <span word="with">with</span> <span word="reviewing">reviewing</span> <span word="climate">climate</span> <span word="change">change</span> <span word="research">research</span>. <span word="They">They</span> <span word="found">found</span> <span word="that">that</span> <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="produced">produced</span> <span word="in">in</span> <span word="streams">streams</span> <span word="is">is</span> <span word="related">related</span> <span word="to">to</span> <span word="human">human</span> <span word="activities">activities</span> <span word="that">that</span> <span word="release">release</span> <span word="nitrogen">nitrogen</span> (氮) <span word="into">into</span> <span word="the">the</span> <span word="environment">environment</span>, <span word="such">such</span> <span word="as">as</span> <span word="fertilizer">fertilizer</span> <span word="use">use</span> <span word="and">and</span> <span word="sewage">sewage</span> <span word="discharges">discharges</span>.</p><p> “<span word="Human">Human</span> <span word="activities">activities</span>, <span word="including">including</span> <span word="fossil">fossil</span> <span word="fuel">fuel</span> <span word="combustion">combustion</span> <span word="and">and</span> <span word="intensive">intensive</span> <span word="agriculture">agriculture</span>, <span word="have">have</span> <span word="increased">increased</span> <span word="the">the</span> <span word="availability">availability</span> <span word="of">of</span> <span word="nitrogen">nitrogen</span> <span word="in">in</span> <span word="the">the</span> <span word="environment">environment</span>,” <span word="said">said</span> <span word="Jake">Jake</span> <span word="Beaulieu">Beaulieu</span> <span word="of">of</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Notre">Notre</span> <span word="Dame">Dame</span> <span word="and">and</span> <span word="the">the</span> <span word="U">U</span>.<span word="S">S</span>. <span word="Environmental">Environmental</span> <span word="Protection">Protection</span> <span word="Agency">Agency</span> <span word="in">in</span> <span word="Cincinnati">Cincinnati</span>, <span word="Ohio">Ohio</span>, <span word="and">and</span> <span word="lead">lead</span> <span word="author">author</span> <span word="of">of</span> <span word="the">the</span> <span word="paper">paper</span> <span word="published">published</span> <span word="this">this</span> <span word="week">week</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Proceedings">Proceedings</span> <span word="of">of</span> <span word="the">the</span> <span word="National">National</span> <span word="Academy">Academy</span> <span word="of">of</span> <span word="Sciences">Sciences</span>.</p><p> “<span word="Much">Much</span> <span word="of">of</span> <span word="this">this</span> <span word="nitrogen">nitrogen</span> <span word="is">is</span> <span word="transported">transported</span> <span word="into">into</span> <span word="river">river</span> <span word="and">and</span> <span word="stream">stream</span> <span word="networks">networks</span>,” <span word="Beaulieu">Beaulieu</span> <span word="said">said</span>. <span word="There">There</span>, <span word="microbes">microbes</span> (微生物) <span word="convert">convert</span> <span word="the">the</span> <span word="nitrogen">nitrogen</span> <span word="into">into</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> (<span word="also">also</span> <span word="called">called</span> <span word="laughing">laughing</span> <span word="gas">gas</span>) <span word="and">and</span> <span word="an">an</span> <span word="inert">inert</span> <span word="gas">gas</span> <span word="called">called</span> <span word="dinitrogen">dinitrogen</span> (二氮).</p><p> <span word="The">The</span> <span word="finding">finding</span> <span word="is">is</span> <span word="important">important</span>, <span word="the">the</span> <span word="researchers">researchers</span> <span word="say">say</span>, <span word="because">because</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="is">is</span> <span word="a">a</span> <span word="powerful">powerful</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="that">that</span> <span word="contributes">contributes</span> <span word="to">to</span> <span word="climate">climate</span> <span word="change">change</span> <span word="and">and</span> <span word="destruction">destruction</span> <span word="of">of</span> <span word="the">the</span> <span word="stratosphere">stratosphere</span>’<span word="s">s</span> <span word="ozone">ozone</span> <span word="layer">layer</span>, <span word="which">which</span> <span word="protects">protects</span> <span word="us">us</span> <span word="from">from</span> <span word="the">the</span> <span word="sun">sun</span>’<span word="s">s</span> <span word="harmful">harmful</span> <span word="ultraviolet">ultraviolet</span> (紫外线) <span word="radiation">radiation</span>. <span word="Compared">Compared</span> <span word="with">with</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span>, <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="is">is</span> 300-<span word="fold">fold</span> <span word="more">more</span> <span word="powerful">powerful</span> <span word="in">in</span> <span word="terms">terms</span> <span word="of">of</span> <span word="its">its</span> <span word="warming">warming</span> <span word="potential">potential</span>, <span word="though">though</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="is">is</span> <span word="a">a</span> <span word="far">far</span> <span word="more">more</span> <span word="common">common</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span>. <span word="Scientists">Scientists</span> <span word="estimate">estimate</span> <span word="nitrous">nitrous</span> <span word="oxide">oxide</span> <span word="accounts">accounts</span> <span word="for">for</span> <span word="about">about</span> 6 <span word="percent">percent</span> <span word="of">of</span> <span word="human">human</span>-<span word="induced">induced</span> <span word="climate">climate</span> <span word="change">change</span>.</p>
页:
[1]