2015考研英语阅读太空时代的结束
<p> <span word="The">The</span> <span word="end">end</span> <span word="of">of</span> <span word="the">the</span> <span word="Space">Space</span> <span word="Age">Age</span></p><p> 太空时代的结束</p><p> <span word="HOW">HOW</span> <span word="big">big</span> <span word="is">is</span> <span word="the">the</span> <span word="Earth">Earth</span>? <span word="Any">Any</span> <span word="encyclopedia">encyclopedia</span> <span word="will">will</span> <span word="give">give</span> <span word="you">you</span> <span word="an">an</span> <span word="answer">answer</span>: <span word="its">its</span> <span word="equatorial">equatorial</span> <span word="diameter">diameter</span> <span word="is">is</span>12,756<span word="km">km</span>, <span word="or">or</span>, <span word="for">for</span> <span word="those">those</span> <span word="who">who</span> <span word="prefer">prefer</span> <span word="to">to</span> <span word="think">think</span> <span word="that">that</span> <span word="way">way</span>, 7,926 <span word="miles">miles</span>. <span word="Ah">Ah</span>, <span word="but">but</span> <span word="then">then</span> <span word="there">there</span> <span word="is">is</span> <span word="theatmosphere">theatmosphere</span>. <span word="Should">Should</span> <span word="that">that</span> <span word="count">count</span>? <span word="Perhaps">Perhaps</span> <span word="the">the</span> <span word="planets">planets</span> <span word="true">true</span> <span word="diameter">diameter</span> <span word="is">is</span> <span word="actually">actually</span> <span word="nearer">nearer</span>13,000<span word="km">km</span>, <span word="including">including</span> <span word="all">all</span> <span word="its">its</span> <span word="air">air</span>. <span word="But">But</span> <span word="even">even</span> <span word="that">that</span> <span word="may">may</span> <span word="no">no</span> <span word="longer">longer</span> <span word="be">be</span> <span word="an">an</span> <span word="adequate">adequate</span> <span word="measure">measure</span>. <span word="For">For</span> <span word="theEarth">theEarth</span> <span word="now">now</span> <span word="reaches">reaches</span> <span word="farther">farther</span> <span word="still">still</span>. <span word="The">The</span> <span word="vacuum">vacuum</span> <span word="surrounding">surrounding</span> <span word="it">it</span> <span word="buzzes">buzzes</span> <span word="with">with</span> <span word="artificial">artificial</span> <span word="satellites">satellites</span>,<span word="forming">forming</span> <span word="a">a</span> <span word="sort">sort</span> <span word="of">of</span> <span word="technosphere">technosphere</span> <span word="beyond">beyond</span> <span word="the">the</span> <span word="atmosphere">atmosphere</span>. <span word="Most">Most</span> <span word="of">of</span> <span word="these">these</span> <span word="satellites">satellites</span> <span word="circle">circle</span> <span word="only">only</span> <span word="afew">afew</span> <span word="hundred">hundred</span> <span word="kilometres">kilometres</span> <span word="above">above</span> <span word="the">the</span> <span word="planets">planets</span> <span word="solid">solid</span> <span word="surface">surface</span>. <span word="Many">Many</span>, <span word="though">though</span>, <span word="form">form</span> <span word="a">a</span> <span word="ring">ring</span> <span word="likeSaturns">likeSaturns</span> <span word="at">at</span> <span word="a">a</span> <span word="distance">distance</span> <span word="of">of</span> 36,000<span word="km">km</span>, <span word="the">the</span> <span word="place">place</span> <span word="at">at</span> <span word="which">which</span> <span word="an">an</span> <span word="object">object</span> <span word="takes">takes</span> 24 <span word="hours">hours</span> <span word="to">to</span> <span word="orbit">orbit</span> <span word="theEarth">theEarth</span> <span word="and">and</span> <span word="thus">thus</span> <span word="hovers">hovers</span> <span word="continuously">continuously</span> <span word="over">over</span> <span word="the">the</span> <span word="same">same</span> <span word="point">point</span> <span word="of">of</span> <span word="the">the</span> <span word="planet">planet</span>.</p><p> 地球有多大?任何一本百科全书都会给你答案：赤道直径是12,756公里，或者，用英里来表达7,926英里。嗯，但是大气层有多大呢?也能计算吗? 包括空气在内，地球的直径可能接近13,000公里。甚至连这个数据也不够充分。因为现在地球的变化太大。包围大气层的外部空间人造卫星来去匆匆，形成一个在大气层外面的所谓技术层。大部分卫星绕行高度离地球地表仅几百公里。然而，在距地球36,000公里的轨道上物体绕转地球一周的时间为24小时，这个物体飞行时持续面对的是地球上的不变的同一个点，这样许多地球同步卫星的运行会形成一个类似的土星环。</p>
页:
[1]