2014届高考英语一轮复习 unit24 指导课时作业b卷（含解析） 北师大版

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1、Unit24B卷一、阅读理解AIt’sunlikelytooccurbyswallowingapillordonning(披上)aspecialcloak，butinvisibilitycouldbepossibleinthenottoodistantfuture，accordingtoresearchpublishedonMonday.ButDrUlfLeonhardt，atheoreticalphysicistatStAndrewsUniversityinScotland，believesthemostplausible(似乎合理的)exa

2、mpleistheInvisibleWoman，oneoftheMarvelComicssuperheroinesinFantasticFour.“Sheguideslightaroundherusingaforcefieldinthiscartoon.Thisiswhatcouldbedoneinpractice，”Leonhardtsaid.“Thatcomesclosesttowhatengineerswillprobablybeabletodointhefuture.”Invisibilityisanopticalillusion(错觉

3、)thattheobjectorpersonisnotthere.Leonhardtusestheexampleofwatercirclingaroundastone.Thewaterflowsin，swirls(盘绕)aroundthestoneandthenleavesasifnothingwerethere.“Ifyoureplacethewaterwithlightthenyouwouldnotseethattherewassomethingpresentbecausethelightisguidedaroundthepersonoro

4、bject.Youwouldseethelightcomingfromthescenerybehindasiftherewerenothinginfront.WhattheInvisibleWomandoesiscurvespacearoundherselftobendlight.Whatthesedeviceswoulddoistomimicthatcurvedspace，”hesaid.Althoughthedevicesarestilltheoretical，Leonhardtsaidscientistsaremakingadvances

5、inmetamaterials(超常介质)—artificialmaterialswithunusualpropertiesthatcouldbeusedtomakeinvisibilitydevices.“Thereareadvancesbeingmadeinmetamaterialsthatmeanthefirstdeviceswillprobablybeusedforbendingradarwavesortheelectromagneticwavesusedbymobilephones，”hesaid.Thedevicescouldbeu

6、sedasprotectionmechanismssotheradiationemittedfrommobilephonesdoesnotpenetrateelectronicequipment.Itisguidedaroundit.“Itisverylikelythatthedemonstrationforradarwouldcomefirstandverysoon.Togointothevisualwilltakesometimebutitisalsonotsofaroff，”Leonhardtsaid.1．Fromthetextwecan

7、see______.A．youcanbeinvisiblebytakingsomemedicineB．youcanbeinvisiblebywearingcertainclothesC．DrUlfLeonhardtknowshowtobeinvisible6D．theInvisibleWomanisacharacterinFantasticFour2．HowdoesinvisibilityhappenaccordingtoDrUlfLeonhardt?A．Theobjectsdisappearsecretlybyitself.B．Bymakin

8、gthelightcomefromthescenerybehind.C．Bycurvingspacearoundtheobjecttobendligh