2011GRE考试选择题精炼(1)
<p> 2014<span word="gre">gre</span>数学选择题精炼</p><p> <span word="Petworld">Petworld</span> <span word="has">has</span> <span word="exactly">exactly</span> <span word="fourteen">fourteen</span> <span word="animals">animals</span> <span word="that">that</span> <span word="are">are</span> <span word="kept">kept</span> <span word="in">in</span> <span word="four">four</span> <span word="separate">separate</span> <span word="cages">cages</span> <span word="according">according</span> <span word="to">to</span> <span word="the">the</span> <span word="following">following</span> <span word="conditions">conditions</span>:</p><p> <span word="Each">Each</span> <span word="cage">cage</span> <span word="contains">contains</span> <span word="exactly">exactly</span> <span word="two">two</span>, <span word="four">four</span>, <span word="or">or</span> <span word="six">six</span> <span word="animals">animals</span>. <span word="Any">Any</span> <span word="cage">cage</span> <span word="containing">containing</span> <span word="a">a</span> <span word="gerbil">gerbil</span> <span word="also">also</span> <span word="contains">contains</span> <span word="at">at</span> <span word="least">least</span> <span word="one">one</span> <span word="hamster">hamster</span>; <span word="any">any</span> <span word="cage">cage</span> <span word="containing">containing</span> <span word="a">a</span> <span word="hamster">hamster</span> <span word="also">also</span> <span word="contains">contains</span> <span word="at">at</span> <span word="least">least</span> <span word="one">one</span> <span word="gerbil">gerbil</span>. <span word="Any">Any</span> <span word="cage">cage</span> <span word="containing">containing</span> <span word="a">a</span> <span word="lizard">lizard</span> <span word="also">also</span> <span word="contains">contains</span> <span word="at">at</span> <span word="least">least</span> <span word="one">one</span> <span word="snake">snake</span>; <span word="any">any</span> <span word="cage">cage</span> <span word="containing">containing</span> <span word="a">a</span> <span word="snake">snake</span> <span word="also">also</span> <span word="contains">contains</span> <span word="at">at</span> <span word="least">least</span> <span word="one">one</span> <span word="lizard">lizard</span>. <span word="Neither">Neither</span> <span word="cage">cage</span> <span word="Y">Y</span> <span word="nor">nor</span> <span word="cage">cage</span> <span word="Z">Z</span> <span word="contains">contains</span> <span word="a">a</span> <span word="gerbil">gerbil</span>. <span word="Neither">Neither</span> <span word="cage">cage</span> <span word="W">W</span> <span word="nor">nor</span> <span word="cage">cage</span> <span word="X">X</span> <span word="contains">contains</span> <span word="a">a</span> <span word="lizard">lizard</span>.</p><p> . <span word="Which">Which</span> <span word="one">one</span> <span word="of">of</span> <span word="the">the</span> <span word="following">following</span> <span word="could">could</span> <span word="be">be</span> <span word="a">a</span> <span word="complete">complete</span> <span word="and">and</span> <span word="accurate">accurate</span> <span word="list">list</span> <span word="of">of</span> <span word="the">the</span> <span word="animals">animals</span> <span word="kept">kept</span> <span word="in">in</span> <span word="cages">cages</span> <span word="W">W</span> <span word="and">and</span> <span word="Y">Y</span>?</p><p> <span word="W">W</span>: <span word="one">one</span> <span word="gerbil">gerbil</span> <span word="and">and</span> <span word="one">one</span> <span word="hamster">hamster</span>; <span word="Y">Y</span>: <span word="two">two</span> <span word="lizards">lizards</span> <span word="and">and</span> <span word="two">two</span> <span word="snakes">snakes</span></p><p> <span word="W">W</span>: <span word="one">one</span> <span word="gerbil">gerbil</span> <span word="and">and</span> <span word="two">two</span> <span word="hamsters">hamsters</span>; <span word="Y">Y</span>: <span word="one">one</span> <span word="lizard">lizard</span> <span word="and">and</span> <span word="three">three</span> <span word="snakes">snakes</span></p><p> <span word="W">W</span>: <span word="two">two</span> <span word="gerbils">gerbils</span> <span word="and">and</span> <span word="two">two</span> <span word="hamsters">hamsters</span>; <span word="Y">Y</span>: <span word="one">one</span> <span word="lizard">lizard</span> <span word="and">and</span> <span word="four">four</span> <span word="snakes">snakes</span></p><p> <span word="W">W</span>: <span word="two">two</span> <span word="gerbils">gerbils</span> <span word="and">and</span> <span word="two">two</span> <span word="hamsters">hamsters</span>; <span word="Y">Y</span>: <span word="three">three</span> <span word="lizards">lizards</span> <span word="and">and</span> <span word="one">one</span> <span word="snake">snake</span></p><p> <span word="W">W</span>: <span word="two">two</span> <span word="gerbils">gerbils</span> <span word="and">and</span> <span word="two">two</span> <span word="lizards">lizards</span>; <span word="Y">Y</span>: <span word="two">two</span> <span word="hamsters">hamsters</span> <span word="and">and</span> <span word="two">two</span> <span word="snakes">snakes</span></p><p> . <span word="If">If</span> <span word="there">there</span> <span word="are">are</span> <span word="exactly">exactly</span> <span word="two">two</span> <span word="hamsters">hamsters</span> <span word="in">in</span> <span word="cage">cage</span> <span word="W">W</span> <span word="and">and</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="gerbils">gerbils</span> <span word="in">in</span> <span word="cage">cage</span> <span word="X">X</span> <span word="is">is</span> <span word="equal">equal</span> <span word="to">to</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="snakes">snakes</span> <span word="in">in</span> <span word="cage">cage</span> <span word="Y">Y</span>, <span word="then">then</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="snakes">snakes</span> <span word="in">in</span> <span word="cage">cage</span> <span word="Z">Z</span> <span word="must">must</span> <span word="be">be</span> <span word="exactly">exactly</span></p><p> <span word="one">one</span></p><p> <span word="two">two</span></p><p> <span word="three">three</span></p><p> <span word="four">four</span></p>
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