大学英语六级考试拓展阅读练习(20)
<p> <span word="Launching">Launching</span> <span word="people">people</span> <span word="into">into</span> <span word="space">space</span> <span word="may">may</span> <span word="make">make</span> <span word="headlines">headlines</span> <span word="but">but</span> <span word="it">it</span> <span word="does">does</span> <span word="little">little</span> <span word="useful">useful</span> <span word="science">science</span>. <span word="So">So</span> <span word="when">when</span> <span word="George">George</span> <span word="Bush">Bush</span> <span word="redirected">redirected</span> <span word="Americas">Americas</span> <span word="space">space</span> <span word="agency">agency</span>, <span word="NASA">NASA</span>, <span word="away">away</span> <span word="from">from</span> <span word="scientific">scientific</span> <span word="research">research</span> <span word="and">and</span> <span word="towards">towards</span> <span word="a">a</span> <span word="manned">manned</span> <span word="return">return</span> <span word="to">to</span> <span word="the">the</span> <span word="moon">moon</span> <span word="in">in</span> 2004, <span word="many">many</span> <span word="scientists">scientists</span> <span word="were">were</span> <span word="disappointed">disappointed</span>. <span word="Now">Now</span> <span word="the">the</span> <span word="agency">agency</span> <span word="has">has</span> <span word="finally">finally</span> <span word="offered">offered</span> <span word="some">some</span> <span word="small">small</span> <span word="morsels">morsels</span> <span word="of">of</span> <span word="comfort">comfort</span> <span word="in">in</span> <span word="the">the</span> <span word="form">form</span> <span word="of">of</span> <span word="four">four</span> <span word="projects">projects</span> <span word="that">that</span> <span word="could">could</span> <span word="accompany">accompany</span> <span word="efforts">efforts</span> <span word="for">for</span> <span word="a">a</span> <span word="lunar">lunar</span> <span word="return">return</span>.</p><p> <span word="The">The</span> <span word="most">most</span> <span word="exciting">exciting</span> <span word="of">of</span> <span word="these">these</span> <span word="is">is</span> <span word="the">the</span> <span word="plan">plan</span> <span word="for">for</span> <span word="a">a</span> <span word="radio">radio</span> <span word="telescope">telescope</span> <span word="that">that</span> <span word="could">could</span> <span word="be">be</span> <span word="placed">placed</span> <span word="on">on</span> <span word="the">the</span> <span word="far">far</span> <span word="side">side</span> <span word="of">of</span> <span word="the">the</span> <span word="moon">moon</span>. <span word="Such">Such</span> <span word="a">a</span> <span word="device">device</span> <span word="would">would</span> <span word="look">look</span> <span word="back">back</span> <span word="at">at</span> <span word="the">the</span> <span word="early">early</span> <span word="universe">universe</span> <span word="to">to</span> <span word="the">the</span> <span word="time">time</span> <span word="when">when</span> <span word="large">large</span>-<span word="scale">scale</span> <span word="structures">structures</span> <span word="such">such</span> <span word="as">as</span> <span word="galaxies">galaxies</span> <span word="and">and</span> <span word="stars">stars</span> <span word="formed">formed</span>. <span word="A">A</span> <span word="lunar">lunar</span>-<span word="based">based</span> <span word="radio">radio</span> <span word="telescope">telescope</span> <span word="would">would</span> <span word="be">be</span> <span word="able">able</span> <span word="to">to</span> <span word="detect">detect</span> <span word="long">long</span> <span word="wavelengths">wavelengths</span> <span word="that">that</span> <span word="cannot">cannot</span> <span word="be">be</span> <span word="sensed">sensed</span> <span word="on">on</span> <span word="Earth">Earth</span> <span word="because">because</span> <span word="they">they</span> <span word="are">are</span> <span word="absorbed">absorbed</span> <span word="by">by</span> <span word="the">the</span> <span word="outermost">outermost</span> <span word="layers">layers</span> <span word="of">of</span> <span word="the">the</span> <span word="planets">planets</span> <span word="atmosphere">atmosphere</span>. <span word="Moreover">Moreover</span> <span word="by">by</span> <span word="pointing">pointing</span> <span word="the">the</span> <span word="telescope">telescope</span> <span word="away">away</span> <span word="from">from</span> <span word="the">the</span> <span word="din">din</span> <span word="of">of</span> <span word="shorter">shorter</span>-<span word="wavelength">wavelength</span> <span word="radio">radio</span> <span word="waves">waves</span> <span word="that">that</span> <span word="are">are</span> <span word="used">used</span> <span word="for">for</span> <span word="communication">communication</span> <span word="on">on</span> <span word="Earth">Earth</span>, <span word="astrophysicists">astrophysicists</span> <span word="would">would</span> <span word="be">be</span> <span word="able">able</span> <span word="to">to</span> <span word="see">see</span> <span word="the">the</span> <span word="early">early</span> <span word="universe">universe</span> <span word="in">in</span> <span word="unprecedented">unprecedented</span> <span word="detail">detail</span>.</p><p> <span word="Finding">Finding</span> <span word="alien">alien</span> <span word="life">life</span> <span word="might">might</span> <span word="also">also</span> <span word="be">be</span> <span word="possible">possible</span> <span word="with">with</span> <span word="such">such</span> <span word="a">a</span> <span word="telescope">telescope</span>. <span word="It">It</span> <span word="would">would</span> <span word="be">be</span> <span word="able">able</span> <span word="to">to</span> <span word="map">map</span> <span word="the">the</span> <span word="magnetic">magnetic</span> <span word="fields">fields</span> <span word="of">of</span> <span word="stars">stars</span> <span word="and">and</span> <span word="exoplanets">exoplanets</span> . <span word="It">It</span> <span word="is">is</span> <span word="the">the</span> <span word="magnetic">magnetic</span> <span word="field">field</span> <span word="of">of</span> <span word="the">the</span> <span word="Earth">Earth</span> <span word="that">that</span> <span word="protects">protects</span> <span word="its">its</span> <span word="inhabitants">inhabitants</span> <span word="from">from</span> <span word="being">being</span> <span word="bombarded">bombarded</span> <span word="by">by</span> <span word="high">high</span>-<span word="energy">energy</span> <span word="particles">particles</span> <span word="from">from</span> <span word="space">space</span> <span word="that">that</span> <span word="would">would</span> <span word="otherwise">otherwise</span> <span word="leave">leave</span> <span word="the">the</span> <span word="planet">planet</span> <span word="sterile">sterile</span>. <span word="Detecting">Detecting</span> <span word="a">a</span> <span word="magnetic">magnetic</span> <span word="field">field</span> <span word="surrounding">surrounding</span> <span word="an">an</span> <span word="Earth">Earth</span>-<span word="like">like</span> <span word="exoplanet">exoplanet</span> <span word="would">would</span> <span word="prove">prove</span> <span word="a">a</span> <span word="promising">promising</span> <span word="sign">sign</span> <span word="for">for</span> <span word="finding">finding</span> <span word="extraterrestrial">extraterrestrial</span> <span word="life">life</span>.</p>
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