新gre阅读理解36套exercise4解析

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1、Exercise4Itisapopularmisconceptionthatnuclearfusion核聚变powerisfreeofradioactivity放射性;infact,thedeuterium-tritium氘和氚reactionthatnuclearscientistsarecurrentlyexploringwithsuchzealproducesbothalphaparticlesandneutrons.(Theneutronsareusedtoproducetritiumfromalithiumblanketsurroundingthereact

2、or.)D和T都会发出射线，阿尔法粒子和中子，中子来自于锂变成的TAnothercommonmisconceptionisthatnuclearfusionpowerisavirtuallyunlimitedsourceofenergybecauseoftheenormousquantityofdeuteriuminthesea.Actually,itslimitsaresetbytheamountofavailablelithium,whichisaboutasplentifulasuranium铀intheEarth‘scrust.Researchshouldce

3、rtainlycontinueoncontrollednuclearfusion,butnoenergyprogramshouldbepremisedonitsexistenceuntilithasprovenpractical.(122words)1.Itcanbeinferredfromthepassagethattheauthorbelieveswhichofthefollowingaboutthecurrentstateofpublicawarenessconcerningnuclearfusionpower?(A)Thepublichasbeendelibe

4、ratelymisinformedabouttheadvantagesanddisadvantagesofnuclearfusionpower.(B)Thepublicisunawareoftheprincipaladvantageofnuclearfusionovernuclearfissionasanenergysource.(C)Thepublic‘sawarenessofthescientificfactsconcerningnuclearfusionpowerissomewhatdistortedandincomplete.(D)Thepublicisnot

5、interestedinincreasingitsawarenessoftheadvantagesanddisadvantagesofnuclearfusionpower.(E)Thepublicisawareofthedisadvantagesofnuclearfusionpowerbutnotofitsadvantages.Forthefollowingquestion,considereachofthechoicesseparatelyandselectallthatapply2.Thepassageprovidesinformationthatwouldans

6、werwhichofthefollowingquestionsEXCEPT?□AHowmuchincidentalradiationisproducedinthedeuteriumtritiumfusionreaction?【howmuch，没说具体的量，自己为啥没选呢？可能看着看着就忘记是EXCEPT了】□BWhatislikelytobetheprincipalsourceofdeuteriumfornuclearfusionpower?□CWhyarescientistsexploringthedeuterium-tritiumfusionreactionwit

7、hsuchzeal?RogerRosenblatt‘sbookBlackFiction,inattemptingtoapplyliteraryratherthansociopoliticalcriteriatoitssubject,successfullyalterstheapproachtakenbymostpreviousstudies.【ratherthan表明是用literary，successfully表明作者支持】AsRosenblattnotes,criticismofBlackwritinghasoftenservedasaprete