【尚友制造】36套阅读解析exer4

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1、GeneratedbyFoxitPDFCreator©FoxitSoftwarehttp://www.foxitsoftware.comForevaluationonly.www.sharewithu.comGRE阅读小笔记Exercise4Itisapopularmisconceptionthatnuclearfusionpowerisfreeofradioactivity;infact,thedeuterium-tritiumreactionthatnuclearscientistsarecurrentlyexploringwithsuchzealproducesbothalphapart

2、icles5andneutrons.(Theneutronsareusedtoproducetritiumfromalithiumblanketsurroundingthereactor.)Anothercommonmisconceptionisthatnuclearfusionpowerisavirtuallyunlimitedsourceofenergybecauseoftheenormousquantityofdeuteriuminthesea.10Actually,itslimitsaresetbytheamountofavailablelithium,whichisaboutaspl

3、entifulasuraniumintheEarth‘scrust.Researchshouldcertainlycontinueoncontrollednuclearfusion,butnoenergyprogramshouldbepremisedonitsexistenceuntilithasproven15practical.========================================1.Itcanbeinferredfromthepassagethattheauthorbelieveswhichofthefollowingaboutthecurrentstateof

4、publicawarenessconcerningnuclearfusionpower?(A)Thepublichasbeendeliberatelymisinformedabouttheadvantagesanddisadvantagesofnuclearfusionpower.(B)Thepublicisunawareoftheprincipaladvantageofnuclearfusionovernuclearfissionasanenergysource.(C)Thepublic‘sawarenessofthescientificfactsconcerningnuclearfusio

5、npowerissomewhatdistortedandincomplete.(D)Thepublicisnotinterestedinincreasingitsawarenessoftheadvantagesanddisadvantagesofnuclearfusionpower.(E)Thepublicisawareofthedisadvantagesofnuclearfusionpowerbutnotofitsadvantages.Forthefollowingquestion,considereachofthechoicesseparatelyandselectallthatapply

6、1本文章由尚友原创或整理GeneratedbyFoxitPDFCreator©FoxitSoftwarehttp://www.foxitsoftware.comForevaluationonly.www.sharewithu.com2.ThepassageprovidesinformationthatwouldanswerwhichofthefollowingquestionsEXCEPT?□AHowmuchincidentalradiationisproducedinthedeuteriumtritiumfusionreaction?□BWhatislikelytobetheprincipa

7、lsourceofdeuteriumfornuclearfusionpower?□CWhyarescientistsexploringthedeuterium-tritiumfusionreactionwithsuchzeal?阅读2：文章说到了public对核聚变反应的两种普遍误解。一种认为其没有放射性，而实际上其产生的alfa例子和中子，是反应堆原材料。另一种误解认为核聚变的power是取之不