2017届高考英语一轮单元复习阅读理解训练：Unit 15《Learning》（北师大版含解析）
<p> <span word="Unit">Unit</span> 15 <span word="Learning">Learning</span></p><p> Ⅰ.阅读理解</p><p> <span word="A">A</span></p><p> <span word="Maps">Maps</span> <span word="of">of</span> <span word="the">the</span> <span word="world">world</span>'<span word="s">s</span> <span word="population">population</span> <span word="show">show</span> <span word="that">that</span> <span word="the">the</span> <span word="majority">majority</span> <span word="of">of</span> <span word="people">people</span> <span word="today">today</span> <span word="live">live</span> <span word="near">near</span> <span word="water">water</span>. <span word="We">We</span> <span word="live">live</span> <span word="along">along</span> <span word="coastlines">coastlines</span>, <span word="around">around</span> <span word="bays">bays</span>, <span word="up">up</span> <span word="the">the</span> <span word="course">course</span> <span word="of">of</span> <span word="rivers">rivers</span> <span word="and">and</span> <span word="streams">streams</span> <span word="and">and</span> <span word="on">on</span> <span word="islands">islands</span>. <span word="We">We</span> <span word="also">also</span> <span word="vacation">vacation</span> <span word="at">at</span> <span word="the">the</span> <span word="beach">beach</span> <span word="and">and</span> <span word="find">find</span> <span word="comfort">comfort</span> <span word="fishing">fishing</span> <span word="on">on</span> <span word="a">a</span> <span word="lake">lake</span>. <span word="Nothing">Nothing</span> <span word="makes">makes</span> <span word="small">small</span> <span word="children">children</span> <span word="happier">happier</span> <span word="than">than</span> <span word="the">the</span> <span word="chance">chance</span> <span word="of">of</span> <span word="playing">playing</span> <span word="in">in</span> <span word="water">water</span>.</p><p> <span word="More">More</span> <span word="surprisingly">surprisingly</span>, <span word="this">this</span> <span word="human">human</span> <span word="favor">favor</span> <span word="for">for</span> <span word="water">water</span> <span word="makes">makes</span> <span word="evolutionary">evolutionary</span>(进化的)<span word="sense">sense</span>. <span word="Sure">Sure</span>, <span word="we">we</span> <span word="need">need</span> <span word="drinking">drinking</span> <span word="water">water</span> <span word="to">to</span> <span word="live">live</span>, <span word="but">but</span> <span word="we">we</span> <span word="have">have</span> <span word="also">also</span> <span word="benefited">benefited</span> <span word="from">from</span> <span word="what">what</span>'<span word="s">s</span> <span word="swimming">swimming</span> <span word="under">under</span> <span word="the">the</span> <span word="waves">waves</span>.</p><p> <span word="Neuroscientist">Neuroscientist</span> <span word="Crawford">Crawford</span> <span word="of">of</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="North">North</span> <span word="London">London</span> <span word="has">has</span> <span word="proposed">proposed</span> <span word="that">that</span> <span word="our">our</span> <span word="ancient">ancient</span> <span word="ancestors">ancestors</span> <span word="attached">attached</span> <span word="to">to</span> <span word="the">the</span> <span word="sea">sea</span>, <span word="and">and</span> <span word="that">that</span> <span word="their">their</span> <span word="devotion">devotion</span> <span word="paid">paid</span> <span word="off">off</span> <span word="by">by</span> <span word="allowing">allowing</span> <span word="the">the</span> <span word="human">human</span> <span word="species">species</span> <span word="to">to</span> <span word="develop">develop</span> <span word="large">large</span> <span word="and">and</span> <span word="complex">complex</span> <span word="brains">brains</span>.</p><p> <span word="Crawford">Crawford</span> <span word="claims">claims</span> <span word="that">that</span> <span word="when">when</span> <span word="humans">humans</span> <span word="separated">separated</span> <span word="from">from</span> <span word="apes">apes</span>(类人猿)<span word="and">and</span> <span word="appeared">appeared</span> <span word="in">in</span> <span word="the">the</span> <span word="forests">forests</span> <span word="of">of</span> <span word="Africa">Africa</span>, <span word="they">they</span> <span word="stuck">stuck</span> <span word="close">close</span> <span word="to">to</span> <span word="rivers">rivers</span> <span word="and">and</span> <span word="beaches">beaches</span> <span word="and">and</span> <span word="started">started</span> <span word="catching">catching</span> <span word="fish">fish</span>, <span word="clams">clams</span> <span word="and">and</span> <span word="crabs">crabs</span>. <span word="That">That</span> <span word="seafood">seafood</span> <span word="was">was</span> <span word="packed">packed</span> <span word="with">with</span> <span word="omega">omega</span>3 <span word="fatty">fatty</span> <span word="acids">acids</span>, <span word="essential">essential</span> <span word="fatty">fatty</span> <span word="acids">acids</span> <span word="that">that</span> <span word="promote">promote</span> <span word="brain">brain</span> <span word="cell">cell</span> <span word="growth">growth</span>.</p><p> <span word="It">It</span>'<span word="s">s</span> <span word="no">no</span> <span word="coincidence">coincidence</span>, <span word="Crawford">Crawford</span> <span word="claims">claims</span>, <span word="that">that</span> <span word="human">human</span> <span word="brain">brain</span> <span word="growth">growth</span> <span word="began">began</span> <span word="to">to</span> <span word="increase">increase</span> <span word="rapidly">rapidly</span> <span word="once">once</span> <span word="we">we</span> <span word="left">left</span> <span word="the">the</span> <span word="woods">woods</span> <span word="and">and</span> <span word="headed">headed</span> <span word="for">for</span> <span word="the">the</span> <span word="beach">beach</span>.</p><p> <span word="Scientists">Scientists</span> <span word="have">have</span> <span word="also">also</span> <span word="discovered">discovered</span> <span word="that">that</span> <span word="people">people</span> <span word="who">who</span> <span word="eat">eat</span> <span word="fish">fish</span> <span word="regularly">regularly</span> <span word="are">are</span> <span word="less">less</span> <span word="likely">likely</span> <span word="to">to</span> <span word="suffer">suffer</span> <span word="from">from</span> <span word="depression">depression</span> <span word="than">than</span> <span word="those">those</span> <span word="who">who</span> <span word="eat">eat</span> <span word="less">less</span> <span word="seafood">seafood</span>. <span word="Biochemist">Biochemist</span> <span word="Hibbelin">Hibbelin</span> <span word="of">of</span> <span word="the">the</span> <span word="National">National</span> <span word="Institutes">Institutes</span> <span word="of">of</span> <span word="Health">Health</span> <span word="has">has</span> <span word="shown">shown</span> <span word="that">that</span> <span word="across">across</span> <span word="cultures">cultures</span> <span word="there">there</span> <span word="is">is</span> <span word="a">a</span> <span word="direct">direct</span> <span word="link">link</span> <span word="between">between</span> <span word="amount">amount</span> <span word="of">of</span> <span word="fish">fish</span> <span word="eaten">eaten</span> <span word="each">each</span> <span word="week">week</span> <span word="and">and</span> <span word="rates">rates</span> <span word="of">of</span> <span word="depression">depression</span>. <span word="More">More</span> <span word="interestingly">interestingly</span>, <span word="Hibbelin">Hibbelin</span> <span word="and">and</span> <span word="researcher">researcher</span> <span word="Laura">Laura</span> <span word="have">have</span> <span word="found">found</span> <span word="that">that</span> <span word="fish">fish</span> <span word="is">is</span> <span word="commonly">commonly</span> <span word="used">used</span> <span word="as">as</span> <span word="a">a</span> <span word="symbol">symbol</span> <span word="of">of</span> <span word="happiness">happiness</span> <span word="and">and</span> <span word="good">good</span> <span word="health">health</span> <span word="in">in</span> <span word="various">various</span> <span word="religions">religions</span> <span word="and">and</span> <span word="cultures">cultures</span>.</p>
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