og阅读隐藏答案版（with答案）

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1、GMATReadingComprehensionOfficialGuideTableofContentPassage12Passage24Passage36Passage49Passage511Passage613Passage715Passage817Passage920Passage1022Passage1123Passage1225Passage1327Passage1428Passage1530Passage1632Passage1734Passage1836Passage1938Passage2

2、039Passage2141Passage2243Passage2345Passage2446Passage2548Passage2649Passage2751Passage2853Passage2955Passage3057Passage3159Passage3262Passage3364Passage3466Passage3567Passage3670Passage3771Passage3872Passage3974Passage4076Passage4177Passage4278Passage438

3、0Passage4481Passage4582Passage4683Passage4784Passage48867/24/2021整理chasedream：如水GMATReadingComprehensionOfficialGuide使用说明1、各题答案和解释均隐藏在每篇文章后面，显示的方法是鼠标左键单击“常用”工具栏“显示/隐藏编辑标记”按钮。再次单击又被隐藏。2、试题及答案均经无数遍仔细校对，是官方答案，但错误肯定在所难免。请各位不吝指正，不胜感谢！祝你成功！7/24/2021整理chasedream

4、：如水GMATReadingComprehensionOfficialGuideREADINGCOMPREHENSIONPassage1Caffeine,thestimulantincoffee,hasbeencalled“themostwidelyusedpsychoactivesubstanceonEarth.”Synder,DalyandBrunshaverecentlyproposedthatcaffeineaffectsbehaviorbycounteringtheactivityin(5)th

5、ehumanbrainofanaturallyoccurringchemicalcalledadenosine.Adenosinenormallydepressesneuronfiringinmanyareasofthebrain.Itapparentlydoesthisbyinhibitingthereleaseofneurotransmitters,chemicalsthatcarrynerveimpulsesfromoneneurontothenext.(10)Likemanyotheragents

6、thataffectneuronfiring,adenosinemustfirstbindtospecificreceptorsonneuronalmembranes.Thereareatleasttwoclassesofthesereceptors,whichhavebeendesignatedA1andA2.Snyderetalproposethatcaffeine,whichisstruc-(15)turallysimilartoadenosine,isabletobindtobothtypesof

7、receptors,whichpreventsadenosinefromattachingthereandallowstheneuronstofiremorereadilythantheyotherwisewould.Formanyyears,caffeine’seffectshavebeenattri-(20)butedtoitsinhibitionoftheproductionofphosphodi-esterase,anenzymethatbreaksdownthechemicalcalledcyc

8、licAMP.AnumberofneurotransmittersexerttheireffectsbyfirstincreasingcyclicAMPconcentra-tionsintargetneurons.Therefore,prolongedperiodsat(25)theelevatedconcentrations,asmightbebroughtaboutbyaphosphodiesteraseinhibitor