下面小编跟大家一起了解GRE逻辑单题练习题分享，希望对大家的学习有所帮助。

加强削弱题：加强的其中两种（共五种）方式就是取非反对或者重复举例

Itcanbeinferredfromthepassagethatthefirsttheories"ofgrazercontrolmentionedinline2wouldhavebeenmoreconvincingifresearchershadbeenableto

(A)observehighphytoplanktonnumbersundernaturallakeconditions

(B)discovernegativecorrelationsbetweenalgaeandzooplanktonnumbersfromtheirfieldresearch

(C)understandthecentralimportanceofenvironmentalfactorsincontrollingthegrowthratesofphytoplankton

(D)makeverifiablecorrelationsofcauseandeffectbetweenzooplanktonandphytoplanktonnumbers

(E)inventlaboratorytechniquesthatwouldhaveallowedthemtobypasstheirfieldresearchconcerninggrazercontrol

我们先找到对应段落及定位词

Manytheorieshavebeenformulatedtoexplaintheroleofgrazerssuchaszooplanktonincontrollingtheamountofplanktonicalgae(phytoplankton)inlakes.Thefirsttheoriesofsuchgrazercontrolweremerelybasedonobservationsofnegativecorrelationsbetweenalgalandzooplanktonnumbers.Alownumberofalgalcellsinthepresenceofahighnumberofgrazerssuggested,butdidnotprove,thatthegrazershadremovedmostofthealgae.

紧接着我们继续找出but，即为反对观点。

那么取非反对，文章说不能证明，取非那就是能证明，那不就是选项中的makeverifiablecorrelationsofcauseandeffect吗，答案呼之欲出。

explain题：使矛盾合理化

Historically,acornerstoneofclassicalempiricismhasbeenthenotionthateverytruegeneralizationmustbe/confirm/iablebyspecificobservations.Inclassicalempiricism,thetruthofAllballsarered,"forexample,isassessedbyinspectingballs;anyobservationofanonredballrefutesunequivocallytheproposedgeneralization.

ForW.V.O.Quine,however,thisconstitutesanoverlynarrow"conceptionofempiricism.Allballsarered,"hemaintains,formsonestrandwithinanentirewebofstatements(ourknowledge);individualobservationscanbereferredonlytothiswebasawhole.Asnewobservationsarecollected,heexplains,theymustbeintegratedintotheweb.Problemsoccuronlyifacontradictiondevelopsbetweenanewobservation,say,Thatballisblue,"andthepreexistingstatements.Inthatcase,heargues,anystatementorcombinationofstatements(notmerelytheoffending"generalization,asinclassicalempiricism)canbealteredtoachievethefundamentalrequirement,asystemfreeofcontradictions,evenif,insomecases,thealterationconsistsoflabelingthenewobservationahallucination."

所有的explain题目目的无非就是freeofcontradiction

给大家举一个例子

Theviewtowhichline18refersservesto

(A)reconcileseeminglycontradictoryfacts

(B)undermineapreviouslyheldtheory

(C)takeintoaccountdatapreviouslyheldtobeinsignificant

(D)resolveacontroversy

(E)questionnewmethodsofgatheringdata

我们依旧找到对应文章段落和view

Sincearound50percentofallstarsarebelievedtobegintheirliveswithmassesgreaterthan1.4M⊙,wemightexpectthatoneoutofeverytwostarswoulddieasasupernova.Butinfact,onlyonestarinthirtydiessuchaviolentdeath.Therestexpiremuchmorepeacefullyasplanetarynebulas.Apparentlymostmassivestarsmanagetolosesufficientmaterialthattheirmassesdropbelowthecriticalvalueof1.4M⊙beforetheyexhausttheirnuclearfuel.

EvidencesupportingthisviewcomesfromobservationsofIRC10216,apulsatinggiantstar(astarofgreatluminosityandoflargemass)located700light-yearsawayfromEarth.Ahugerateofmassloss(1M⊙every10,000years)hasbeendeducedfrominfraredobservationsofammonia(NH3)moleculeslocatedinthecircumstellarcloudaroundIRC10216.

我们发现它所支持的view在前面而且，是来使矛盾合理化。

文章说expect二分之一如此消亡，然而实际上是三十分之一如此消亡，那是不是就产生矛盾了，那就必须有一个解释使得它合理化。理论确实如此，而实际也没错。

比如，杰哥说我很帅，鑫哥说我很丑。杰哥所用的依据是一张我的照片。

这个时候我们要使得矛盾合理化，那就是--杰哥拿的那张照片是P过的，所以杰哥鑫哥都没说错，我还是我，只是不同呈现的我。

那么上面是理论与实际不符，那view就是要矛盾合理化：reconcileseeminglycontradictoryfacts