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.(Theneutronsareusedtoproducetritiumfromalithiumblank

2、etsurroundingthereactor.)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,whichisaboutasplentifulas

3、uranium铀intheEarth‘scrust.Researchshouldcertainlycontinueoncontrollednuclearfusion,butnoenergyprogramshouldbepremisedonitsexistenceuntilithasprovenpractical.(122words)1.Itcanbeinferredfromthepassagethattheauthorbelieveswhichofthefollowingaboutthecurrentstateofpublic

4、awarenessconcerningnuclearfusionpower?(A)Thepublichasbeendeliberatelymisinformedabouttheadvantagesanddisadvantagesofnuclearfusionpower.(B)Thepublicisunawareoftheprincipaladvantageofnuclearfusionovernuclearfissionasanenergysource.(C)Thepublic‘sawarenessofthescientifi

5、cfactsconcerningnuclearfusionpowerissomewhatdistortedandincomplete.(D)Thepublicisnotinterestedinincreasingitsawarenessoftheadvantagesanddisadvantagesofnuclearfusionpower.(E)Thepublicisawareofthedisadvantagesofnuclearfusionpowerbutnotofitsadvantages.Forthefollowingqu

6、estion,considereachofthechoicesseparatelyandselectallthatapply2.ThepassageprovidesinformationthatwouldanswerwhichofthefollowingquestionsEXCEPT?□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】□BWhati

7、slikelytobetheprincipalsourceofdeuteriumfornuclearfusionpower?□CWhyarescientistsexploringthedeuterium-tritiumfusionreactionwithsuchzeal?RogerRosenblatt‘sbookBlackFiction,inattemptingtoapplyliteraryratherthansociopoliticalcriteriatoitssubject,successfullyalterstheapp

8、roachtakenbymostpreviousstudies.【ratherthan表明是用literary，successfully表明作者支持】AsRosenblattnotes,criticismofBlackwritinghasoftenservedasaprete