2015职称英语理工类阅读理解复习必备精选练习题(5)
<p> <span word="How">How</span> <span word="the">the</span> <span word="First">First</span> <span word="Stars">Stars</span> <span word="in">in</span> <span word="the">the</span> <span word="Universe">Universe</span> <span word="Came">Came</span> <span word="into">into</span> <span word="Existence">Existence</span></p><p> <span word="Researchers">Researchers</span> <span word="believe">believe</span> <span word="that">that</span> <span word="our">our</span> <span word="universe">universe</span> <span word="began">began</span> <span word="with">with</span> <span word="the">the</span> <span word="Big">Big</span> <span word="Bang">Bang</span>1 <span word="about">about</span> 13 <span word="billion">billion</span> <span word="years">years</span> <span word="ago">ago</span>, <span word="and">and</span> <span word="that">that</span> <span word="soon">soon</span> <span word="after">after</span> <span word="that">that</span> <span word="event">event</span>, <span word="matter">matter</span> <span word="began">began</span> <span word="to">to</span> <span word="form">form</span> <span word="as">as</span> <span word="small">small</span> <span word="dust">dust</span> <span word="grains">grains</span> <span word="and">and</span> <span word="gases">gases</span>. <span word="How">How</span> <span word="the">the</span> <span word="first">first</span> <span word="stars">stars</span> <span word="formed">formed</span> <span word="from">from</span> <span word="this">this</span> <span word="dust">dust</span> <span word="and">and</span> <span word="gas">gas</span> <span word="has">has</span> <span word="been">been</span> <span word="a">a</span> <span word="burning">burning</span> <span word="question">question</span>2 <span word="for">for</span> <span word="years">years</span>, <span word="but">but</span> <span word="a">a</span> <span word="state">state</span>-<span word="of">of</span>-<span word="the">the</span>-<span word="art">art</span>3 <span word="computer">computer</span> <span word="simulation">simulation</span> <span word="now">now</span> <span word="offers">offers</span> <span word="the">the</span> <span word="most">most</span> <span word="detailed">detailed</span> <span word="picture">picture</span> <span word="yet">yet</span> <span word="of">of</span> <span word="how">how</span> <span word="these">these</span> <span word="first">first</span> <span word="stars">stars</span> <span word="in">in</span> <span word="the">the</span> <span word="universe">universe</span> <span word="came">came</span> <span word="into">into</span> <span word="existence">existence</span>.</p><p> <span word="The">The</span> <span word="result">result</span> <span word="is">is</span> <span word="a">a</span> <span word="detailed">detailed</span> <span word="description">description</span> <span word="of">of</span> <span word="the">the</span> <span word="formation">formation</span> <span word="of">of</span> <span word="a">a</span> <span word="protostar">protostar</span>4 <span word="the">the</span> <span word="early">early</span> <span word="stage">stage</span> <span word="of">of</span> <span word="a">a</span> <span word="massive">massive</span> <span word="primordial">primordial</span> <span word="star">star</span> <span word="of">of</span> <span word="our">our</span> <span word="universe">universe</span> -<span word="and">and</span> <span word="the">the</span> <span word="researchers">researchers</span> <span word="computer">computer</span> <span word="simulation">simulation</span> <span word="sets">sets</span> <span word="the">the</span> <span word="bar">bar</span>5 <span word="for">for</span> <span word="further">further</span> <span word="investigation">investigation</span> <span word="into">into</span> <span word="the">the</span> <span word="star">star</span> <span word="formation">formation</span> <span word="process">process</span>. <span word="The">The</span> <span word="question">question</span> <span word="of">of</span> <span word="how">how</span> <span word="the">the</span> <span word="first">first</span> <span word="stars">stars</span> <span word="evolved">evolved</span> <span word="is">is</span> <span word="so">so</span> <span word="important">important</span> <span word="because">because</span> <span word="their">their</span> <span word="formations">formations</span> <span word="and">and</span> <span word="eventually">eventually</span> <span word="explosions">explosions</span> <span word="provided">provided</span> <span word="the">the</span> <span word="seeds">seeds</span> <span word="for">for</span> <span word="subsequent">subsequent</span> <span word="stars">stars</span> <span word="to">to</span> <span word="come">come</span> <span word="into">into</span> <span word="being">being</span>.</p><p> <span word="This">This</span> <span word="general">general</span> <span word="picture">picture</span> <span word="of">of</span> <span word="star">star</span> <span word="formation">formation</span>, <span word="and">and</span> <span word="the">the</span> <span word="ability">ability</span> <span word="to">to</span> <span word="compare">compare</span> <span word="how">how</span> <span word="stellar">stellar</span> <span word="objects">objects</span> <span word="form">form</span> <span word="in">in</span> <span word="different">different</span> <span word="time">time</span> <span word="periods">periods</span> <span word="and">and</span> <span word="regions">regions</span> <span word="of">of</span> <span word="the">the</span> <span word="universe">universe</span>, <span word="will">will</span> <span word="eventually">eventually</span> <span word="allow">allow</span> <span word="investigation">investigation</span> <span word="into">into</span> <span word="the">the</span> <span word="origins">origins</span> <span word="of">of</span> <span word="life">life</span> <span word="and">and</span> <span word="planets">planets</span>, <span word="said">said</span> <span word="Lars">Lars</span> <span word="Hernquist">Hernquist</span>, <span word="a">a</span> <span word="Professor">Professor</span> <span word="of">of</span> <span word="Astronomy">Astronomy</span> <span word="at">at</span> <span word="Harvard">Harvard</span> <span word="University">University</span>. <span word="The">The</span> <span word="abundance">abundance</span> <span word="of">of</span> <span word="elements">elements</span> <span word="in">in</span> <span word="the">the</span> <span word="universe">universe</span> <span word="has">has</span> <span word="increased">increased</span> <span word="as">as</span> <span word="stars">stars</span> <span word="have">have</span> <span word="accumulated">accumulated</span>, <span word="he">he</span> <span word="says">says</span>,<span word="and">and</span> <span word="the">the</span> <span word="formation">formation</span> <span word="and">and</span> <span word="destruction">destruction</span> <span word="of">of</span> <span word="stars">stars</span> <span word="continues">continues</span> <span word="to">to</span> <span word="spread">spread</span> <span word="these">these</span> <span word="elements">elements</span> <span word="further">further</span> <span word="across">across</span> <span word="the">the</span> <span word="universe">universe</span>. <span word="So">So</span> <span word="when">when</span> <span word="you">you</span> <span word="think">think</span> <span word="about">about</span> <span word="it">it</span>, <span word="all">all</span> <span word="of">of</span> <span word="the">the</span> <span word="elements">elements</span> <span word="in">in</span> <span word="our">our</span> <span word="bodies">bodies</span> <span word="originally">originally</span> <span word="formed">formed</span> <span word="from">from</span> <span word="nuclear">nuclear</span> <span word="reactions">reactions</span> <span word="in">in</span> <span word="the">the</span> <span word="centers">centers</span> <span word="of">of</span> <span word="stars">stars</span>, <span word="long">long</span> <span word="ago">ago</span>.</p>
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