广东省2012高考英语二轮复习 专题限时训练 31 科普知识型阅读理解（1）.doc

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1、专题限时训练(三十一)　[科普知识型阅读理解(一)](限时：25分钟)(一)Howyouendacomputersessiondependsonhowyouusethecomputer,yourviewsonenergyconservation(能源的节约),andwhatyouhavebeentoldabouthowyourdecisionwillaffectyourinvestment’slongevity:willfrequentstartingandstoppingcauseitscircuits(电路)toburnoutsooner?Resteasy,yourc

2、omputerismorelikelytobedamagedbyaviruspickedupfromtheInternetthanbybeingturnedoffandontoomuch.Theyarealsoenergyefficient:suchefficiencyhasreachedthepointwheremostcomputersplacethemselvesinsleepmodeiftheyremainidle(闲置的)foracertainperiodoftime.Soyourcomputerwilllikelyslipintosleepmodeanyway

3、,evenifyouleaveitonovernight.Sleepmodeitself,onceaprettyunreliableoption—youneverknewifyouwouldbeabletowakeyourcomputerwithouthavingtoreboot(重新启动)it—hasbeenvastlyimprovedwithneweroperatingsystems.Ifyouwantyourcomputertoconsumeaslittleenergyaspossiblewhennotinuse,shutitdown.Ifyouwantittoco

4、nsumezeroenergy,you’regoingtohavetounplug(拔去……的电源插头)it.Yourcomputercanbeinonlythreestates:on,sleeporoff—eachofwhichdrawssomelevelofelectriccurrent.Acomputerthatis“on”willeitherbeactivelyprocessinginformationorsittingidle,dependingonwhethertheuseristypingadocument,readinganemailorhassteppe

5、dawaybriefly.Theamountofwattage(瓦特数)drawnwhenthecomputerisonvariesgreatlydependingonwhetheritisalaptoporadesktopcomputer.Thelatterusesmoreenergybecausedesktoppowersuppliesarelessefficientandrequireaseparateandoftenlarger,powerhungrymonitor.Italsovariesbasedonthetypeofworkbeingdone:complex

6、calculationsrequiringintensiveprocessingaremorepowerhungry,whereaswritingorWebbrowsingconsumesfarlesselectricity.(　　)1.Ifsleepmodegoeswrong,whatwillprobablyhappentoyourcomputer?A．Itwillconsumeaslittleenergyaspossible.B．ItismorelikelytobedamagedbyaviruspickedupfromtheInternet.C．Itwillhavet

7、oberebootedwhenusedagain.D．Ithastobeshutdownandunplugged.(　　)2.WhichofthefollowingisNOTmentionedinthetextthatcontributestothedifferentamountofenergyacomputerconsumes?7用心爱心专心A．Whetheritisalaptoporadesktopcomputer.B．Whatkindofworkthecomputerisdealingwith.C．Thechoiceof