gre写作6分issue范文分类示范

gre写作6分issue范文分类示范

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时间:2018-09-24

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1、第一类题材StudyIssue183"Asweacquiremoreknowledge,thingsdonotbecomemorecomprehensible,butmorecomplexandmoremysterious."Doesknowledgerenderthingsmorecomprehensible,ormorecomplexandmysterious?Inmyviewtheacquisitionofknowledgebringsaboutallthreeatthesametime.Thisparadoxicalresultisaptlyexplainedandillus

2、tratedbyanumberofadvancesinourscientificknowledge.Consider,forexample,thesonarsystemonwhichblindbatsrelytonavigateandespeciallytoseekprey.Researchershavelearnedthatthissystemisstartlinglysophisticated.Byemittingaudiblesounds,thenprocessingthereturningechoes,abatcandetermineinananosecondnotonlyh

3、owfarawayitsmovingpreyisbutalsotheprey'sspeed,direction,sizeandevenspecie!Thisknowledgeacquiredhelpsexplain,ofcourse,howbatsnavigateandsurvive.Yetatthesametimethisknowledgepointsouttheincrediblecomplexityoftheauditoryandbrainfunctionsofcertainanimals,evenofmerehumans,andcreatesacertainmysteryan

4、dwonderabouthowsuchsystemseverevolvedorganically.Orconsiderourknowledgeoftheuniverse.Advancesintelescopeandspace-explorationtechnologyseemtocorroboratethetheoryofacontinuallyexpandinguniversethatbeganattheverybeginningoftimewitha"bigbang."Ononelevelthisknowledge,assumingitqualifiesassuch,helpsu

5、scomprehendourplaceintheuniverseandourultimatedestiny.Yetontheotherhanditaddsyetanotherchaptertothemysteryaboutwhatexistedbeforetimeandtheuniverse.Orconsidertheareaofatomicphysics.Thenakedhumaneyeperceivesverylittle,ofcourse,ofthecomplexityofmatter.Toourdistantancestorsthephysicalworldappeareds

6、imple--seeminglycomprehensiblebymeansofsightandtouch.Thenbywayofscientificknowledgewelearnedthatallmatteriscomprisedofatoms,whicharefurthercomprisedofprotons,neutrons,andelectrons.Thenwediscoveredanevenmorebasicunitofmattercalledthequark.Andnowanewso-called"string"theorypositstheexistenceofanev

7、enmorefundamental,anduniversal,unitofmatter.Ontheonehand,thesediscoverieshaverenderedthingsmorecomprehensible,byexplainingandreconcilingempiricalobservationsofhowmatterbehaves.Thestringtheoryalsoreconcilesthediscrepancybetweentheq

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