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:2018-08-01

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

2、ltisaptlyexplainedandillustratedbyanumberofadvancesinourscientificknowledge.Consider,forexample,thesonarsystemonwhichblindbatsrelytonavigateandespeciallytoseekprey.Researchershavelearnedthatthissystemisstartlinglysophisticated.Byemittingaudiblesounds,thenprocessingther

3、eturningechoes,abatcandetermineinananosecondnotonlyhowfarawayitsmovingpreyisbutalsotheprey'sspeed,direction,sizeandevenspecie!Thisknowledgeacquiredhelpsexplain,ofcourse,howbatsnavigateandsurvive.Yetatthesametimethisknowledgepointsouttheincrediblecomplexityoftheauditory

4、andbrainfunctionsofcertainanimals,evenofmerehumans,andcreatesacertainmysteryandwonderabouthowsuchsystemseverevolvedorganically.Orconsiderourknowledgeoftheuniverse.Advancesintelescopeandspace-explorationtechnologyseemtocorroboratethetheoryofacontinuallyexpandinguniverse

5、thatbeganattheverybeginningoftimewitha"bigbang."Ononelevelthisknowledge,assumingitqualifiesassuch,helpsuscomprehendourplaceintheuniverseandourultimatedestiny.Yetontheotherhanditaddsyetanotherchaptertothemysteryaboutwhatexistedbeforetimeandtheuniverse.Orconsidertheareao

6、fatomicphysics.Thenakedhumaneyeperceivesverylittle,ofcourse,ofthecomplexityofmatter.Toourdistantancestorsthephysicalworldappearedsimple--seeminglycomprehensiblebymeansofsightandtouch.Thenbywayofscientificknowledgewelearnedthatallmatteriscomprisedofatoms,whicharefurther

7、comprisedofprotons,neutrons,andelectrons.Thenwediscoveredanevenmorebasicunitofmattercalledthequark.Andnowanewso-called"string"theorypositstheexistenceofanevenmorefundamental,anduniversal,unitofmatter.Ontheonehand,thesediscoverieshaverenderedthingsmorecomprehensible,bye

8、xplainingandreconcilingempiricalobservationsofhowmatterbehaves.Thestringtheoryalsoreconcilesthediscrepancybetweentheq

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