2005职称英语题库理工类A级：完形填空
<p> 第6部分：完形填空 (第5<span word="l">l</span>～65题，每题1分，共1 5分)</p><p> 阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，涂在答题卡相应的位置上。</p><p> <span word="Earths">Earths</span> <span word="Inner">Inner</span> <span word="Core">Core</span></p><p> <span word="Scientists">Scientists</span> <span word="have">have</span> <span word="long">long</span> <span word="struggled">struggled</span> <span word="to">to</span> <span word="understand">understand</span> <span word="what">what</span> <span word="lies">lies</span> <span word="at">at</span> <span word="the">the</span> <span word="planets">planets</span> <span word="center">center</span>, <span word="Direct">Direct</span> <span word="observation">observation</span> <span word="of">of</span> <span word="its">its</span> <span word="center">center</span> <span word="is">is</span> <span word="impossible">impossible</span>，<span word="so">so</span> <span word="researchers">researchers</span> <span word="must">must</span>_____(51)<span word="to">to</span> <span word="other">other</span> <span word="evidence">evidence</span>. <span word="In">In</span> 1889，<span word="a">a</span> <span word="German">German</span> <span word="scientist">scientist</span> <span word="detected">detected</span> <span word="a">a</span> <span word="severe">severe</span> <span word="earthquake">earthquake</span> <span word="in">in</span> <span word="Japan">Japan</span>.<span word="Geophysicists">Geophysicists</span> <span word="concluded">concluded</span> <span word="that">that</span> <span word="shock">shock</span> <span word="waves">waves</span>_____(52)<span word="jolts">jolts</span>(晃动)<span word="from">from</span> <span word="one">one</span> <span word="side">side</span> <span word="of">of</span> <span word="Earth">Earth</span> <span word="through">through</span> <span word="the">the</span> <span word="center">center</span> <span word="to">to</span> <span word="the">the</span> <span word="other">other</span> <span word="side">side</span>.<span word="Then">Then</span> <span word="in">in</span> 1936，<span word="Danish">Danish</span> <span word="geophysicist">geophysicist</span> <span word="Inge">Inge</span> <span word="Lehmann">Lehmann</span> <span word="studied">studied</span> <span word="the">the</span> <span word="waves">waves</span>______(53) <span word="to">to</span> <span word="determine">determine</span> <span word="that">that</span> <span word="within">within</span> <span word="Earths">Earths</span> <span word="core">core</span> <span word="of">of</span> <span word="molten">molten</span>(熔化了的)<span word="iron">iron</span> <span word="lies">lies</span> <span word="a">a</span> <span word="solid">solid</span> <span word="inner">inner</span> <span word="core">core</span>-<span word="but">but</span>_____(54)<span word="that">that</span> <span word="core">core</span> <span word="was">was</span> <span word="made">made</span> <span word="of">of</span> <span word="eluded">eluded</span>(难倒)<span word="her">her</span>.<span word="Other">Other</span> <span word="geophysicists">geophysicists</span> <span word="quickly">quickly</span></p><p><span word="determined">determined</span> <span word="that">that</span> <span word="Lehmanns">Lehmanns</span> <span word="inner">inner</span> <span word="core">core</span> <span word="was">was</span> <span word="composed">composed</span> <span word="mostly">mostly</span>_____(55)<span word="iron">iron</span>. <span word="Since">Since</span> <span word="then">then</span>，</p><p> <span word="Lehmanns">Lehmanns</span> <span word="discovery">discovery</span> <span word="has">has</span>_____(56)<span word="conventional">conventional</span> <span word="Earth">Earth</span> <span word="science">science</span>.<span word="But">But</span> <span word="now">now</span> <span word="scientists">scientists</span> <span word="are">are</span> <span word="challenging">challenging</span> <span word="traditional">traditional</span> <span word="theory">theory</span> <span word="with">with</span> <span word="new">new</span> <span word="and">and</span> <span word="radical">radical</span> _____(57) <span word="For">For</span> <span word="example">example</span>，<span word="Earths">Earths</span> <span word="center">center</span> <span word="could">could</span> <span word="actually">actually</span> <span word="contain">contain</span> <span word="aninner">aninner</span> <span word="core">core</span> <span word="within">within</span> <span word="the">the</span> <span word="inner">inner</span> <span word="core">core</span>，<span word="claim">claim</span> <span word="Ishii">Ishii</span> <span word="and">and</span> <span word="colleague">colleague</span> <span word="Adam">Adam</span> <span word="Dziewonski">Dziewonski</span>.</p><p> <span word="Analyzing">Analyzing</span> <span word="hundreds">hundreds</span> <span word="of">of</span> <span word="thousands">thousands</span> <span word="of">of</span> <span word="earthquake">earthquake</span> <span word="wave">wave</span> _____(58),<span word="they">they</span> <span word="maintain">maintain</span> <span word="that">that</span> <span word="the">the</span> <span word="inner">inner</span> <span word="core">core</span> <span word="has">has</span> <span word="at">at</span> <span word="its">its</span> <span word="heart">heart</span> <span word="a">a</span> <span word="tiny">tiny</span>, <span word="even">even</span> <span word="more">more</span> <span word="solid">solid</span> <span word="sphere">sphere</span>(球体) . <span word="This">This</span> <span word="spheremay">spheremay</span> <span word="be">be</span> <span word="the">the</span> <span word="oldest">oldest</span> <span word="fossil">fossil</span>____(59)<span word="from">from</span> <span word="the">the</span> <span word="formation">formation</span> <span word="of">of</span> <span word="Earth">Earth</span>，<span word="says">says</span> <span word="Dziewonski">Dziewonski</span>.</p>
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