【优化指导】（课标全国）高考英语总复习 课时作业30 北师大版

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1、【优化指导】（课标全国）高考英语总复习课时作业30北师大版一、阅读理解ADoesyourlaptopsometimesgetsohotthatitcanalmostbeusedtofryeggs?Newtechnologymayhelpcoolit，andgiveinformationtechnologyauniquetwist，saysJairoSinova，aprofessor.Laptopsaregettingincreasinglypowerful，butastheygetsmallertheyareheatingup，anddealingwi

2、ththeexcessiveheathasbecomeaheadache，Sinovaexplains.“Theheartoftheproblemisthewayinformationisprocessed，”Sinovanotes.“Laptopsandsomeotherdevicesuseflowsofelectricitytoprocessinformation，andtherebyalsoproduceheat.Theoretically，excessiveheatcouldmeltthelaptop，andalsowastesconsider

3、ableenergy.”Sinova’sresearchisonanalternatewaytoprocessinformation.“Ourresearchlooksatthespin(旋转)ofelectrons(电子)，tinyparticlesthatnakedeyescannotdetect，”heexplains.“Thedirectionstheyturncanbeusedtorecordandprocessinformation.”Toprocessinformation，Sinovasays，itisnecessarytocreate

4、information，transmittheinformation，andfinallyreadit.Thequestionis，canwechangethewaythisisdone？“Thedevicewe’vedesignedarrangestheelectronsaccordingtospintogetherwiththeinformationwewanttoprocess.Wethentransmittheelectronstoanotherplaceinthedevicebutwiththespinstillsurviving，andfi

5、nallyareabletomeasurethedirectionoftheirspinthroughavoltage(电压)thattheyproduce，”Sinovaexplains.Thebiggestchallengetocreateaspinbaseddevicewasthedistancetheelectronscouldtravelwhilestillkeepingtheirspin.“Transmissionisnoproblemnow.Whereasbeforethelimitwasseveralhundredfeet，witho

6、urdeviceinformationcaneasilybetransmittedhundredsofmiles，”hesays.“Thisnewdevice，astheonlyspinbaseddeviceforinformationprocessing，hasalotofrealpracticalpotential，”hesays.“Onehugeadvantageisthatitisoperationalatroomtemperature，whichnobodyhadbeenabletoachieveuntilnow.Itmayleadtoan

7、ewandmoreefficientwaytoprocessinformation.”71．Todealwithhotlaptops，weneedto______.A．makethemsmallerB．protectthemwithspecialmaterialsC．findanewwaytoprocessinformationD．speedupthemovementofelectrons2．WhatcanwelearnaboutSinova’sdevice?A．Itmakesinformationeasilytransmittedtohundreds

8、ofmilesaway.B．Itcanbeoperatedatanytemperature.C