专业英语四级精选阅读50篇5
<p> <span word="Living">Living</span> <span word="Space">Space</span></p><p> <span word="How">How</span> <span word="much">much</span> <span word="living">living</span> <span word="space">space</span> <span word="does">does</span> <span word="a">a</span> <span word="person">person</span> <span word="need">need</span>? <span word="What">What</span> <span word="happens">happens</span> <span word="when">when</span> <span word="his">his</span> <span word="space">space</span> <span word="needs">needs</span> <span word="are">are</span> <span word="not">not</span> <span word="met">met</span>? <span word="Scientists">Scientists</span> <span word="are">are</span> <span word="doing">doing</span> <span word="experiments">experiments</span> <span word="on">on</span> <span word="rats">rats</span> <span word="to">to</span> <span word="try">try</span> <span word="to">to</span> <span word="determine">determine</span> <span word="the">the</span> <span word="effects">effects</span> <span word="of">of</span> <span word="overcrowded">overcrowded</span> <span word="conditions">conditions</span> <span word="on">on</span> <span word="man">man</span>. <span word="Recent">Recent</span> <span word="studies">studies</span> <span word="have">have</span> <span word="shown">shown</span> <span word="that">that</span> <span word="the">the</span> <span word="behavior">behavior</span> <span word="of">of</span> <span word="rats">rats</span> <span word="is">is</span> <span word="greatly">greatly</span> <span word="affected">affected</span> <span word="by">by</span> <span word="space">space</span>. <span word="If">If</span> <span word="rats">rats</span> <span word="have">have</span> <span word="enough">enough</span> <span word="living">living</span> <span word="space">space</span>, <span word="they">they</span> <span word="eat">eat</span> <span word="well">well</span>, <span word="sleep">sleep</span> <span word="well">well</span> <span word="and">and</span> <span word="produce">produce</span> <span word="their">their</span> <span word="young">young</span> <span word="well">well</span>. <span word="But">But</span> <span word="if">if</span> <span word="their">their</span> <span word="living">living</span> <span word="conditions">conditions</span> <span word="become">become</span> <span word="too">too</span> <span word="crowded">crowded</span>, <span word="their">their</span> <span word="behavior">behavior</span> <span word="and">and</span> <span word="even">even</span> <span word="their">their</span> <span word="health">health</span> <span word="change">change</span> <span word="obviously">obviously</span>. <span word="They">They</span> <span word="can">can</span> <span word="not">not</span> <span word="sleep">sleep</span> <span word="and">and</span> <span word="eat">eat</span> <span word="well">well</span>, <span word="and">and</span> <span word="signs">signs</span> <span word="of">of</span> <span word="fear">fear</span> <span word="and">and</span> <span word="worry">worry</span> <span word="become">become</span> <span word="clear">clear</span>. <span word="The">The</span> <span word="more">more</span> <span word="crowded">crowded</span> <span word="they">they</span> <span word="are">are</span>, <span word="and">and</span> <span word="more">more</span> <span word="they">they</span> <span word="tend">tend</span> <span word="to">to</span> <span word="bite">bite</span> <span word="each">each</span> <span word="other">other</span> <span word="and">and</span> <span word="even">even</span> <span word="kill">kill</span> <span word="each">each</span> <span word="other">other</span>. <span word="Thus">Thus</span>, <span word="for">for</span> <span word="rats">rats</span>, <span word="populations">populations</span> <span word="and">and</span> <span word="violence">violence</span> <span word="are">are</span> <span word="directly">directly</span> <span word="related">related</span>. <span word="Is">Is</span> <span word="this">this</span> <span word="a">a</span> <span word="natural">natural</span> <span word="law">law</span> <span word="for">for</span> <span word="human">human</span> <span word="society">society</span> <span word="as">as</span> <span word="well">well</span>? <span word="Is">Is</span> <span word="enough">enough</span> <span word="space">space</span> <span word="not">not</span> <span word="only">only</span> <span word="satisfactory">satisfactory</span>, <span word="but">but</span> <span word="necessary">necessary</span> <span word="for">for</span> <span word="human">human</span> <span word="survival">survival</span>? <span word="These">These</span> <span word="are">are</span> <span word="interesting">interesting</span> <span word="questions">questions</span>.</p><p> </p>
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