【北师大版】2016届高三英语一轮复习题库 必修1 Unit 2《Heroes》
<p> <span word="Unit">Unit</span> 2 <span word="Heroes">Heroes</span></p><p> Ⅰ.阅读理解</p><p> <span word="A">A</span></p><p> <span word="LOS">LOS</span> <span word="ANGELES">ANGELES</span>—<span word="Old">Old</span> <span word="people">people</span> <span word="who">who</span> <span word="keep">keep</span> <span word="walking">walking</span> <span word="a">a</span> <span word="relatively">relatively</span> <span word="long">long</span> <span word="distance">distance</span> <span word="may">may</span> <span word="be">be</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="cognitive">cognitive</span>(认知的) <span word="decline">decline</span>，<span word="a">a</span> <span word="new">new</span> <span word="study">study</span> <span word="suggests">suggests</span>.</p><p> “<span word="By">By</span> <span word="walking">walking</span> <span word="regularly">regularly</span>，<span word="and">and</span> <span word="maintaining">maintaining</span> <span word="a">a</span> <span word="little">little</span> <span word="bit">bit</span> <span word="of">of</span> <span word="moderate">moderate</span> <span word="physical">physical</span> <span word="activity">activity</span>，<span word="you">you</span> <span word="can">can</span> <span word="reduce">reduce</span> <span word="your">your</span> <span word="likelihood">likelihood</span> <span word="of">of</span> <span word="developing">developing</span> <span word="Alzheimer">Alzheimer</span>'<span word="s">s</span> <span word="disease">disease</span> <span word="and">and</span> <span word="spare">spare</span> <span word="brain">brain</span> <span word="tissue">tissue</span>，” <span word="Kirk">Kirk</span> <span word="I">I</span>．<span word="Erickson">Erickson</span>，<span word="the">the</span> <span word="study">study</span>'<span word="s">s</span> <span word="lead">lead</span> <span word="author">author</span>，<span word="said">said</span>.</p><p> <span word="Erickson">Erickson</span> <span word="and">and</span> <span word="his">his</span> <span word="colleagues">colleagues</span> <span word="from">from</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Pittsburgh">Pittsburgh</span> <span word="began">began</span> <span word="to">to</span> <span word="establish">establish</span> <span word="a">a</span> <span word="link">link</span> <span word="between">between</span> <span word="walking">walking</span> <span word="and">and</span> <span word="memory">memory</span> <span word="in">in</span> 1989.</p><p> <span word="A">A</span>ccording to the report on their study published online Wednesday in Neurology，an official journal of the American Academy of Neurology，researchers tracked the physical activity and cognitive patterns of nearly 300 adults.</p><p> <span word="A">A</span>t the very beginning，all participants，on average 78 years old and about two－thirds being women，were in good cognitive health.The researchers charted how many blocks each person walked in one week.</p><p> <span word="Nine">Nine</span> <span word="years">years</span> <span word="later">later</span>，<span word="the">the</span> <span word="participants">participants</span> <span word="were">were</span> <span word="given">given</span> <span word="a">a</span> <span word="MRI">MRI</span> <span word="scan">scan</span> <span word="to">to</span> <span word="measure">measure</span> <span word="their">their</span> <span word="brain">brain</span> <span word="size">size</span>.<span word="All">All</span> <span word="of">of</span> <span word="them">them</span> <span word="were">were</span> <span word="deemed">deemed</span> <span word="to">to</span> <span word="be">be</span>“<span word="cognitively">cognitively</span> <span word="normal">normal</span>.”</p><p> <span word="But">But</span> <span word="after">after</span> <span word="four">four</span> <span word="more">more</span> <span word="years">years</span>，<span word="test">test</span> <span word="showed">showed</span> <span word="a">a</span> <span word="little">little</span> <span word="more">more</span> <span word="than">than</span> <span word="one">one</span> <span word="third">third</span> <span word="of">of</span> <span word="the">the</span> <span word="participants">participants</span> <span word="had">had</span> <span word="developed">developed</span> <span word="a">a</span> <span word="mild">mild</span> <span word="cognitive">cognitive</span> <span word="impairment">impairment</span> <span word="or">or</span> <span word="dementia">dementia</span>.</p><p> <span word="By">By</span> <span word="correlating">correlating</span> <span word="cognitive">cognitive</span> <span word="health">health</span>，<span word="brain">brain</span> <span word="scans">scans</span> <span word="and">and</span> <span word="walking">walking</span> <span word="patterns">patterns</span>，<span word="the">the</span> <span word="research">research</span> <span word="team">team</span> <span word="found">found</span> <span word="that">that</span> <span word="being">being</span> <span word="more">more</span> <span word="physically">physically</span> <span word="active">active</span> <span word="appeared">appeared</span> <span word="to">to</span> <span word="lower">lower</span> <span word="the">the</span> <span word="risk">risk</span> <span word="of">of</span> <span word="developing">developing</span> <span word="cognitive">cognitive</span> <span word="impairment">impairment</span>.</p>
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