2017届高三英语一轮基础阅读理解训练（2）及答案
<p> 杭州市2017高考英语阅读理解一轮基础练习（2）及答案</p><p> 较难题目特训：科普知识类</p><p> 阅读下面短文，掌握其大意，从每题所给的<span word="A">A</span>、<span word="B">B</span>、<span word="C">C</span>、<span word="D">D</span>四个选项中，选出最佳选项，并在答题卡上将该项涂黑。</p><p> <span word="Like">Like</span> <span word="distance">distance</span> <span word="runners">runners</span> <span word="on">on</span> <span word="measured">measured</span> <span word="course">course</span>, <span word="all">all</span> <span word="of">of</span> <span word="us">us</span> <span word="will">will</span> <span word="move">move</span> <span word="through">through</span> <span word="time">time</span> <span word="in">in</span> <span word="a">a</span> <span word="roughly">roughly</span> <span word="predictable">predictable</span> <span word="pattern">pattern</span>.</p><p> <span word="In">In</span> <span word="the">the</span> <span word="first">first</span> <span word="stage">stage</span> <span word="of">of</span> <span word="our">our</span> <span word="lives">lives</span>, <span word="we">we</span> <span word="develop">develop</span> <span word="and">and</span> <span word="grow">grow</span>, <span word="reaching">reaching</span> <span word="toward">toward</span> <span word="the">the</span> <span word="top">top</span> <span word="of">of</span> <span word="physical">physical</span> <span word="vitality">vitality</span> (<span word="energy">energy</span>).</p><p> <span word="After">After</span> <span word="we">we</span> <span word="grow">grow</span> <span word="up">up</span>, <span word="however">however</span>, <span word="the">the</span> <span word="body">body</span> <span word="begins">begins</span> <span word="a">a</span> <span word="process">process</span> <span word="of">of</span> <span word="gradually">gradually</span> <span word="wearing">wearing</span> <span word="out">out</span>.</p><p> <span word="A">A</span> <span word="new">new</span> <span word="awareness">awareness</span> <span word="of">of</span> <span word="physical">physical</span> <span word="fitness">fitness</span> <span word="may">may</span> <span word="help">help</span> <span word="lengthen">lengthen</span> <span word="our">our</span> <span word="years">years</span> <span word="of">of</span> <span word="health">health</span> <span word="and">and</span> <span word="vitality">vitality</span>, <span word="yet">yet</span> <span word="nothing">nothing</span> <span word="we">we</span> <span word="do">do</span> <span word="will">will</span> <span word="work">work</span> <span word="to">to</span> <span word="stop">stop</span> <span word="the">the</span> <span word="unavoidable">unavoidable</span> <span word="force">force</span> <span word="of">of</span> <span word="aging">aging</span>.</p><p> <span word="Most">Most</span> <span word="of">of</span> <span word="the">the</span> <span word="changes">changes</span> <span word="of">of</span> <span word="aging">aging</span> <span word="take">take</span> <span word="place">place</span> <span word="deep">deep</span> <span word="inside">inside</span> <span word="the">the</span> <span word="body">body</span>. <span word="The">The</span> <span word="lungs">lungs</span> <span word="become">become</span> <span word="less">less</span> <span word="able">able</span> <span word="to">to</span> <span word="take">take</span> <span word="in">in</span> <span word="oxygen">oxygen</span>. <span word="Powerful">Powerful</span> <span word="muscles">muscles</span> <span word="gradually">gradually</span> <span word="lose">lose</span> <span word="their">their</span> <span word="strength">strength</span>. <span word="The">The</span> <span word="heart">heart</span> <span word="loses">loses</span> <span word="power">power</span> <span word="and">and</span> <span word="pumps">pumps</span> <span word="less">less</span> <span word="blood">blood</span>. <span word="Bones">Bones</span> <span word="grow">grow</span> <span word="easier">easier</span> <span word="to">to</span> <span word="break">break</span>.</p><p> <span word="Finally">Finally</span>, <span word="we">we</span> <span word="meet">meet</span> <span word="a">a</span> <span word="stress">stress</span>, <span word="a">a</span> <span word="stress">stress</span> <span word="that">that</span> <span word="is">is</span> <span word="greater">greater</span> <span word="than">than</span> <span word="our">our</span> <span word="physical">physical</span> <span word="resistance">resistance</span>. <span word="Often">Often</span>, <span word="it">it</span> <span word="is">is</span> <span word="only">only</span> <span word="a">a</span> <span word="minor">minor</span> <span word="accident">accident</span> <span word="or">or</span> <span word="chance">chance</span> <span word="infection">infection</span> (<span word="a">a</span> <span word="disease">disease</span> <span word="caused">caused</span> <span word="by">by</span> <span word="virus">virus</span>), <span word="but">but</span> <span word="this">this</span> <span word="time">time</span>, <span word="it">it</span> <span word="brings">brings</span> <span word="life">life</span> <span word="to">to</span> <span word="an">an</span> <span word="end">end</span>.</p><p> <span word="In">In</span> 1932, <span word="a">a</span> <span word="classic">classic</span> <span word="experiment">experiment</span> <span word="nearly">nearly</span> <span word="doubled">doubled</span> <span word="the">the</span> <span word="lifetime">lifetime</span> <span word="of">of</span> <span word="rats">rats</span>, <span word="simply">simply</span> <span word="by">by</span> <span word="cutting">cutting</span> <span word="back">back</span> <span word="the">the</span> <span word="calories">calories</span> (<span word="unit">unit</span> <span word="for">for</span> <span word="measuring">measuring</span> <span word="the">the</span> <span word="energy">energy</span> <span word="value">value</span> <span word="of">of</span> <span word="food">food</span>)<span word="in">in</span> <span word="their">their</span> <span word="diet">diet</span>. <span word="The">The</span> <span word="reason">reason</span> <span word="for">for</span> <span word="the">the</span> <span word="effect">effect</span> <span word="was">was</span> <span word="then">then</span> <span word="unknown">unknown</span>.</p>
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