北师大版高中英语必修第二册单元测试题含答案

北师大版高中英语必修第二册单元测试题含答案Unit4InformationTechnology单元测评卷(时间:120分钟满分:150分)第一部分听力(共两节,满分30分)略第二部分阅读(共两节,满分50分)第一节(共15小题;每小题2.5分,满分37.5分)阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。ATeenagersinEnglanddomuchthesameaschildreninAmericado.Theyenjoysendingmessagesbytheirmobilephonesandtheyalsolikeswimming,listeningtothelatestmusic,watchingTVandsurfingtheInternet.HowdoteenagersinEnglandspendtheirfreetimeandholidays?Let’sfollowSally,aBritishteenager,andspendfivedayswithherduringherschoolholiday.DayOneAfterbreakfast,Sally’smotherwentoutandleftheraloneathome.Shecheckedhermobilephoneduringlunch—oneofherfriendssentheramessageearlyinthemorning.Dinnerwasat6:30pm.Afterthat,shefinishedherEnglishhomework.ThenshesurfedtheInternet.DayTwoSallyandhermotherpaidavisittotheirfriendsandwentswimmingtogether.Later,theywentshoppingforclothesandbooks,andhaddinnerinarestaurant.DayThreeShewenttothesupermarketwithhermothertobuyfishandchipsforlunchaswellassomepens.Aftershegotbackhome,shespentthenextfewhourssurfingtheInternetandwatchingTV.DayFourShesurfedtheInternet.Hermothertookheroutforlunchbeforeshewenttowork.Shethenreadstoriesafterlunch.DayFiveShewokeupat2pm,andsodidhermother.Theywenttoapark.Hermothermetsomefriendsthere.Whentheygothome,itwasalreadytimefordinner.Afterwards,shedidherhomeworkuntil10pm.21.WhendidSallydoherhomework?A.Inthemorning. B.Intheafternoon.C.Atlunchtime. D.Intheevening.22.Sallyandhermotherwentshoppingforthesecondtimetobuy.

A.foodforlunchandpens B.somebooksandpensC.somefishandclothes D.foodandbooks23.WhichofthefollowingthingsdidSallydoonDayFour?A.Shewentswimming.B.Shewentoutforbreakfast.C.Shereadbooks.D.Shewentshopping.24.Accordingtothepassage,itcanbeinferredthat.

A.surfingtheInternethasbecomeanimportantpartofteenagers’livesB.parentsshouldn’tleaveteenagersaloneathomeC.teenagersdon’tusuallydotheirhomeworkduringtheirschoolholidaysD.aparkisthebestplacetomeetafriendBNowadays,withthedevelopmentoftheInternet,emojis(表情符号)aremoreandmorepopularamongnetizens.Somepeopleevenfeeldifficulttotalkonlinewithoutusingemojis.Emojishelpnetizenstocommunicatewitheachothereasilyandvividly.Yet,notallemojisareproperlyusedonsocialmedia.Sowearegoingtointroducesomecommonbutconfusingemojistohelpyouhaveabetterunderstandingofthesesmallsigns.1.Arecentsurveyshowsthatover53%peopleusethisemojiwhentheyarechattingonline.Somepeoplethinkitmeans“I’mshy,”butothersonlyuseitwhentheyaresurprisedorshocked.Butwhatdoesitreallymean?Itisstillanunsolvedquestion.2.Whatdoyouthinkofthissign?Believeitornot,80%ofnetizensuseitunderthemeaningof“Itisnotfunnyatall,butIhavetosmile.”Isitright?Ofcoursenot!Itactuallymeansthat“Isawwhatyoudid(usuallybadthings)andIwanttogiveyouasinister(奸诈的)smile.”3.Peoplehaveverydifferentopinionsonthisemoji.TheApplecompanyhastoldthatthisemojimeans“highfive(嗨,击掌)”.Butmostpeoplestillusetheincorrectmeaning—pray.Somenetizenseventhink,“Ifyouseethisemojiastwopeoplegiveeachotherahighfive,youmustbeabadguy.”4.Accordingtotheofficialguidelines(官方指南),itisusedas“smilethroughtears(破涕为笑)”.However,mostyoungnetizensconsiderthisemojias“laughtotears”orsimply“LOL”,whichmeans“laughoutloud”.25.Afterreadingthepassage,westillcan’tunderstandtheemojiwell.

26.Youareplayingwithyourmobilephonewhileyouaredoingyourhomework,yourbrothersendsyouthissign,whatdoeshemean?A.Stopdoingyourhomework.B.Sendthisemojibacktoyourfather.C.Goonplayingwithyourmobilephone.D.Putawayyourmobilephoneanddoyourhomework.27.Whenyourfriendtellsyouonlinethathewonfirstprizeinthewritingcompetition,whichemojiwillyousendhim?28.Whydoesthewriterintroducethesefouremojis?A.Becausetheyaremoreimportant.B.Becausetheyarenotsocommon.C.Tohelpnetizensusethemeasily.D.Tohelpnetizensusethemproperly.CMostpeoplehaveneverheardofTimBerners-Lee.HeisnotnearlyasrichorfamousasMareAndreessen,whoisthefounderofNetscape,orBillGates,whosenamehasbecomeawell-knownword.Berners-Lee,whoworkedinasmallofficeattheMassachusettsInstituteofTechnology,isthecreatoroftheWorldWideWeb.ThecreationoftheWebissoimportantthatsomepeoplecompareBerners-LeetoJohannGutenberg,whoinventedprintingbymovabletype(活字)inthefifteenthcentury.Berners-LeewasborninEnglandin1955.Hisparents,whohelpeddesigntheworld’sfirstcommercially(商业地)availablecomputer,gavehimagreatloveofmathematicsandlearning.In1980,Berners-LeewenttoworkatCERN,aphysicslaboratoryinGeneva,Switzerland,wherehehadalotofmaterialstolearnquickly.Hehadapoormemoryforfactsandwantedtofindawaytohelphimkeeptrackofthingshecouldn’tremember.Heinventedasoftwareprogramthatallowedhimtocreateadocumentthathadlinkstootherdocuments.Hecontinuedtodevelophisideathroughthe1980s.Hewantedtofindawaytoconnecttheknowledgeandcreativityofpeopleallovertheworld.In1991,hisprojectbecameknownastheWorldWideWeb.ThenumberofInternetusersstartedtogrowquickly.However,Berners-LeewasnotcompletelyhappywiththewaytheWebhaddeveloped.Hethoughtithadbecomeapassivetoolforsomanypeople,notthetoolforcreativitythathehadimagined.In1999,Berners-LeepublishedabookcalledWeavingtheWeb,inwhichheanswersquestionsheisoftenasked,“WhatwereyouthinkingwhenyouinventedtheWeb?”“Whatdoyouthinkofitnow?”“WhereistheWebgoingtotakeusinthefuture?”29.Fromparagraph1wecansee.

A.TimBerners-LeehasneverheardofNetscapeB.Berners-LeeisasfamousasMareAndreessenC.Berners-Leeisaswell-knownasBillGatesD.weknowlittleaboutTimBerners-Lee30.WhichofthefollowingisTRUE?A.In1955,Berners-Lee’sparentsgavehimagreatloveofmusic.B.In1980,Berners-Leewantedtofindawaytoconnecttheknowledgeandcreativity.C.In1991,Berners-LeefinishedtheWorldWideWeb.D.In1999,Berners-LeemadeaplaycalledWeavingtheWeb.31.Whatdoestheunderlinedword“published”mean?A.Printedandsentout.B.Boughtandofferedtoothers.C.Inventedandsold.D.Wroteandexchanged.DYoudon’tneedtogetinatime-travellingmachinetoseehowtechnologywillreshapeourlives,suchasthewayweshop.Severalnewtechnologiesthataretochangeyourbuyinghabitsalreadyexist.Let’sseewhat’sinstoreforyourfutureshopping.Tryiton,virtually(虚拟的).Wanttoshoponlineforanewpairofeyeglasses?Youdon’tneedtoguesswhichpairlooksbestonyou—usetheeBayFashioniPhoneapp(程序)totryapairofeyewearyou’recheckingoutonapictureofyourface.Butwhatifyouwanttobuysomethingbigger?ThankstoMicrosoftKinect’smotiontrackingcamera,youcancoverclothesonyourscreenbody.Youcanevenchoosethebackgroundofyourvirtualfittingroomtoenrichyourshoppingexperience.Getaperfect,customfit.Everyone’sbodyisshapeddifferently.Togetaperfectfit,yousometimeshavetogetyourclotheschanged.Butbyusing3Dscanningtechnology,alltheclothesyoubuywillfityourbodyperfectly.Somecompaniesscanyourbodyusinghigh-techtogetthemostaccuratemeasurements,sotheycanmakespecialclothesjustforyou.High-techshoppingcartsandcheckoutcounters.High-techshoppingcartscould,intime,beacommonsightinmallsandsupermarkets.MicrosoftKinect-enabledcartsarecurrentlyundertest.Thecartcanfollowyoualongtheaisles(通道),controlledmerelybyyourmovementandyourvoice.InChina,asupermarketchainintroducedtablet-equippedcartsthatguideshoppersaroundthestores’aisles.IntheUnitedStates,severalsupermarketsuseadevicecalledScanItthatgivesbuyersthefreedomtoscanpurchasesontheirownwhiletheyshop.Whileit’sgreatnothavingtolineupatacheckoutcounter,wewouldn’tminditifthestoreusedToshiba’snewObjectRecognitionScanner.Themachineidentifiesaproductassoonasit’splacedinfrontofacamerajustbyitsshapeandcolor,evenifithasnobarcode.32.Accordingtoparagraph2,theeBayFashioniPhoneappcan.

A.onlymakepicturesofourfacesB.helpussellmoreclothesonlineC.createusavirtualdressingroomD.choosesuitableglassesforus33.Whichofthefollowingcanhelpgetthecorrectshapeofourbody?A.ObjectRecognitionScanner.B.TheeBayFashioniPhoneapp.C.3Dscanningtechnology.D.MicrosoftKinect-enabledcarts.34.Whatcanweinferfromthispassage?A.Checkoutcounterswilldisappearfromsupermarketsinfuture.B.High-techshoppingcartswillbewidelyusedinmallsandsupermarkets.C.“ScanIt”cannotbeusedbybuyersthemselves.D.Thenewtechnologiesareonlydreamsthatareimpossibletocometrue.35.Thispassagemainlytalksabout.

A.anewtime-travellingmachineB.theinfluenceofnewtechnologiesC.someinventionstochangehabitsD.thewaysforfutureshopping第二节(共5小题;每小题2.5分,满分12.5分)阅读下面短文,从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选项。Therehavebeenalotofcommentsrecentlysurrounding5G,thenextgenerationofwirelesstechnology.36Howmightitchangeourlives?

5Gstandsforthefifthgeneration,meaningthenextstepintheprogressionoftechnologytoreplacethecurrent4Gsystem.Earlier“G”systemsweredesignedtoimprovemobilecommunicationoperations.Eachnewtechnologybroughtmajorimprovementsinspeedandgreatlyincreasednetworkcapacity(容量).37Itisexpectedtopermitmoreuserstodomorethingsatafasterrate.

However,technologyexpertssaythereisamajorwaythat5Gisdifferentfromtheearliersystems.38Itwillaffectmoredevicesandindustriesthanother“G”versions.

5Gwillhelpfuelfuture“smartcities”byconnectingsensornetworks.5Gisalsoexpectedtoconnectself-drivingcarsandsupportnewtechnologiesinvolvingvirtualreality(虚拟现实).Higher5Gspeedscouldalsopermitdoctorstocommonlyperformremotemedicaloperations.Factoriesandbusinessescoulduse5Gtechnologytoincreaseautomationandimprovethecollectionofinformation.39Theincreaseddataflowacross5GnetworkswouldgiveInternetattackersalotmorepossibilitiestostealandmisusedata.Inaddition,thewideruseofa5Gwirelessnetworkmeansanybreakdownofthesystemwouldhavemorewidespreadandsevereresults.Suchdifficultiescouldaffectpublicsafety.40oranetworkbreakdowncouldcauseself-drivingvehiclestocrash.

A.Whyis5Gsopopular?B.Whatisthistechnology?C.Everycoinhastwosides.D.Thenew5Gsystempromisesmoreofthesame.E.Itwillmovebeyondmobilenetworktechnology.F.Abreakdownof5Gnetworksmaycauseeconomiclosses.G.Afailureduringadoctor’sremoteoperationcouldleadtodeath,第三部分语言运用(共两节,满分30分)第一节(共15小题;每小题1分,满分15分)阅读下面短文,从每题所给的A、B、C、D四个选项中,选出可以填入空白处的最佳选项。ManypeopleliketosearchtheInternet.ExploringtheInternetisoneofthemostimportantactivitiesoftheday.TheInternet41theoutsideworldclosertopeople’shomes.Somepeoplesaytheworldis42thanbeforebecauseoftheInternet.

What’sgoingonin43countries?Howdopeopleliveinplacesfaraway?Isthereagoodsportsgame44?What’sthelifelikeinthe45partofthesea?46youwanttoanswerallthesequestions,47cometotheInternet.Ofcourse,peoplecanalsolearn48readingorlisteningtotheradio.ButwiththeInternettheycanlearnbetterandmoreeasily.Alotof49canbecollectedatgreatspeed.

Canwegoshoppingwithoutleaving50?Canweseeadoctorwithoutgoingtothehospital?Canwe51withoutgoingtoschool?Canwedrawmoneywithoutgoingtoa52?Allthesethingsusedtobeimpossible,butnowtheyhavebecomequite53.TheInternethelpsusopenour54.TheInternetoftengivesusnewideas.Inaword,ithelpsusinmany55.GreatchangeshavetakenplaceinourlifesincetheuseoftheInternet.

41.A.takes B.brings C.gives D.helps42.A.smaller B.bigger C.larger D.nearer43.A.another B.rich C.other D.poor44.A.everywhere B.anywhere C.nowhere D.somewhere45.A.farthest B.deepest C.highest D.widest46.A.If B.Whether C.Because D.Though47.A.only B.and C.then D.also48.A.about B.on C.at D.through49.A.things B.messages C.information D.letters50.A.homes B.schools C.shops D.banks51.A.read B.play C.study D.write52.A.home B.school C.shop D.bank53.A.impossible B.possible C.interesting D.quick54.A.minds B.mouths C.computers D.ideas55.A.roads B.ways C.kinds D.places第二节(共10小题;每小题1.5分,满分15分)阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。TheInternetisan56.(amaze)informationresource.Students,teachers,57.researchersuseitas58.importanttool.Journalistsuseittofindinformationforstories.Doctorsuseittolearnmoreaboutunfamiliardiseasesandthe59.(late)medicaldevelopment.Ordinarypeopleuseitforshopping,banking,bill-paying,andcommunicatingwithfamilyandfriends.Peopleallovertheworlduseit60.(connect)withindividualsfromothercountriesandcultures.However,whiletherearemanypositivedevelopmentsassociatedwiththeInternet,therearealsocertainfearsand61.(concern).Oneconcernisalackofcontroloverwhat62.(appear)ontheInternet.Withtelevisionandradiotheeditorswillchecktheaccuracyofthecontentsofprograms,andwithtelevisiontherearelimitsonwhatkindsofprogramscan63.(broadcast)andatwhattimeoftheday.However,64.theInternet,parentscancheckapublishedguidetodeterminewhatis65.(suit)fortheirchildrentosee.

第四部分写作(共两节,满分40分)第一节(满分15分)假定你是李华,从互联网上得知一个国际中学生组织将在新加坡(Singapore)举办夏令营,欢迎各国学生参加。请写一封电子邮件申请参加。内容主要包括:1.自我介绍(包括英语能力);2.参加意图(介绍中国、了解其他国家);3.希望获准。注意:1.词数80左右;2.可以适当增加细节,以使行文连贯;3.邮件开头和结尾已为你写好。DearSirorMadam,

Regards,LiHua第二节(满分25分)阅读下面材料,根据其内容和所给段落开头语续写两段,使之构成一篇完整的短文。ItwasMother’sDayandIwasshoppingatthelocalsupermarketwithmysonwhowasfiveyearsold,Tenyson.Aswewereleavingafterfinishingourshopping,werealizedthatonlyminutesearlieranelderlywomanhadfallenoverattheentranceandhitherheadonthegroundbadly.Herhusbandwaswithher,buttherewasbloodeverywhereandthewomanwasembarrassedandclearlyinshock.Fortunately,alotofpeoplestoppedtohelpout.Whilewewerewalkingtowardsthescene,Tenysonbecameveryworriedaboutwhathadhappenedtotheelderlycouple.Hesaidtome,“Mum,it’snotmuchfunfallingoverinfrontofeveryone.”Seeingthattherewasaflowerstall(摊位)atthefrontofthesupermarket,headded,“Whyshouldn’twebuytheladyaflower?Itwillmakeherfeelbetter.”Iwasamazedthathe’dcomeupwiththissweetidea.Sowewentoverandtoldtheflowersellerwhatwewanted.“Justtakeit,”shereplied.“Ican’ttakeyourmoneyforsuchawonderfuldeed.”Bynowmedicalstaffhadarrived,andwerelookingaftertheinjuredwoman.Therewesawtheoldmanwasalsoingreathorror,buthetriedtocomforthiswifeandheldherhandstightlytoencouragehertobestrong.Wegavetheflowertothewoman’shusbandandItoldhimitwasfrommyson.Atthat,theoldmanstartedcryingandsaid,“Thankyouverymuch.”Hethenturnedtome,“Youhaveawonderfulson.HappyMother’sDaytoyou.”Themanbentdownandgavehiswifetheflower,tellingherwhoitwasfrom.Regardlessofbeingbadlyhurt,theoldladylookedupatTenysonwithloveinhereyesandgavehimalittlesmile.Andmysonbentdownhisbodytotheinjuredladyandtenderlysaid,“HappyMother’sDaytoyou,too.”注意:续写词数应为150左右。Afteramoment,theelderlyladywastakenintoanambulance,

Oneyearlater,

参考答案第一部分听力略第二部分阅读21.D22.A23.C24.A25.A26.D27.C28.D29.D30.C31.A32.D33.C34.B35.D36.B37.D38.E39.C40.G第三部分语言运用41.B42.A43.C44.D45.B46.A47.C48.D49.C50.A51.C52.D54.A55.B56.amazing57.and58.an59.latest60.toconnect61.concerns62.appears63.bebroadcast/broadcasted64.with65.suitable第四部分写作第一节DearSirorMadam,I’mLiHua,amiddleschoolstudentfromChina.IreadtheannouncementofthesummercampthatyouhavepostedontheInternetandIaminterestedinit.IknowthatyouwelcomestudentsfromdifferentcountriesandI’dliketotakepartinit.I’vebeenlearningEnglishfor10years,andIcanspeakEnglishfluently.Whatismore,I’llbeabletotellstudentsfromothercountriesaboutChinaandlearnabouttheircountriesaswell.IhopeIwillbeacceptedasamemberofyoursummercamp.Lookingforwardtoyourreply!Regards,LiHua第二节Afteramoment,theelderlyladywastakenintoanambulance,andwassenttohospitalbymedicalstaff.Thecrowdgraduallyscattered.TenysonandIwenthome.Onourwayhome,heaskedmeworriedly,“Mum,willtheelderlyladybeOKsincesheistoooldandshehasbadlyfallenover?”Ilookedathimandsaid.“Theelderlyladywillbefinesincethereweresomanypeoplecomingtohelpher.Andyoudidawonderfuldeed,myboy.”Oneyearlater,itwasMother’sDayagain.Aslastyear,IwentshoppingatthelocalsupermarketwithTenyson.Suddenly,Tenysonsaidexcitedly,“Look,Mum.Itisthatelderlylady.”Ilookedthatwayandsawtheelderlyladyandherhusband.Itseemedthatshehadrecoveredfromherinjury.Wewalkedtowardsthemandtheywerehappytomeetus,too.Theelderlyladyhuggedmysonandwhisperedtohim.“Iwillneverforgetthefloweryougaveme,mysweetboy.”Unit5HumansAndNature单元测评卷(时间：120分钟满分：150分)第一部分听力(共两节，满分30分)略第二部分阅读(共两节，满分50分)第一节(共15小题；每小题2.5分，满分37.5分)阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项。AHavinglivedinCaliforniauntil1970,myfamilyhasfeltanumberofearthquakes.Wehavebeenfortunate,however,tohavesufferednobodilyharmorpropertydamage.ThereisawebsitethatlistsallCaliforniaearthquakesrecordedfrom1769tothepresent.Thesiteliststhedatesandtimesaswellasthemagnitude(震级)andtheexactlocationofanyquakethatmeasuredmorethan6.0.Thereareonlyafewquakesthatstandoutinmymemoryand,luckily,noneisshowninthewebsite.So,mypersonalexperiencewithearthquakesmightbeconsideredinsignificant.Therearethreeearthquakesthataredifficulttoforget.Thefirstonewasin1955andouroldestdaughterwaswalkingwithmeinourbackyardinRedwoodCityinCalifornia.AstheshakingbecamestrongerIheldhertomewithonearmasIheldontooneofourfruittreeswiththeother.Allthreeofus(mydaughter,Iandthetree)shookfortwoorthreeminutesthattousfeltlikehours.Thesecondonewasin1963.OurentirefamilywasvisitingDisneylandinSouthernCalifornia.Theearthstartedtoshakejustaswewerebeginningtowalkfromourhoteltowardthefamouslandmark.

MythirdexperiencewithanearthquakewasalonelyoneinCalifornia.ItwasinmysixtiesandIwasaloneinanoldchurch.Asthebuildingstartedtoshake,Iquicklyheadedforthedoortogooutside.IrememberIsaidalittleprayer—somethinglike,“Helpmegetoutofhereintime,DearHeavenlyFather”.Minuteslater,Iwassafeoutside.21.Theauthorwritesthepassagemainlytotellusabout.

A.anewfilmaboutanearthquakeB.howtosurviveanearthquakeC.histhreeearthquakeexperiencesD.howtosavechildreninanearthquake22.Theearthquakestheauthorhasexperienced.

A.allcausedbodilyharmB.areallrecordedinawebsiteC.allmeasuredmorethan6.0D.allhappenedinCalifornia23.Whatdoestheunderlinedpart“thefamouslandmark”referto?A.Achurch.B.Disneyland.C.Abuildingdestroyedbyanearthquake.D.Theplacewheretheauthorwasborn.24.WhichofthefollowingstatementsisNOTtrueaboutthethirdearthquake?A.Ithappenedintheauthor’ssixties.B.Theauthorsucceededingettingoutside.C.Whenithappened,theauthorwasinachurch.D.Theauthorwastooafraidtowalkwhenithappened.BIt’sagoodideaforfamiliestotalkaboutwhattheywoulddotoescapeafire.You’llwanttoknowhowtoescapefromafire,solet’sstarthere.Anescapeplancanhelpeverymemberofafamilygetoutofaburninghouse.Theideaistogetoutsidequicklyandsafely.Smokefromafirecanmakeithardtoseewherethingsare,soit’simportanttolearnandrememberthedifferentwaysoutofyourhome.Ifyouliveinanapartmentbuilding,you’llwanttoknowthebestwaytothestairorotheremergencyexits.Ifyou’reinaroomwiththedoorclosedwhenthefirebreaksout,youneedtotakeafewextrasteps:Checktoseeifthere’sheatorsmokecominginthecracks(裂缝)aroundthedoor.Ifyoudon’tseesmoke—touchthedoor.Ifthedoorishotorverywarm—don’topenthedoor!Ifyoudon’tseesmokeandthedoorisnothot—thenuseyourfingerstolightlytouchthedoorknob(门把手).Ifthedoorknobishotorverywarm—don’topenthedoor!Ifthedoorknobfeelscool,andyoucan’tseeanysmokearoundthedoor,youcanopenthedoorverycarefullyandslowly.Whenyouopenthedoor,ifyoufeelaburstofheat,orsmokepoursintotheroom,quicklyshutthedoorandmakesureitisreallyclosed.Ifthere’snosmokeorheatwhenyouopenthedoor,gotowardyourescaperouteexit.25.Thebesttitleforthepassageis.

A.HowtoDealwithSmokefromaFireB.HowtoMakeanEscapePlanandanEscapeRouteC.TheBestWaytoFindtheStairorOtherEmergencyExitsD.StepsonHowtoEscapeaFireinaRoomwiththeDoorClosed26.Ifyouareinaroomwherethereisafire,thewritersuggeststhatyoushould.

A.getoutsidequicklyandsafelyB.stayintheroomandwaitforhelpC.trytoputoutthefirebyyourselfD.jumpoutoftheroomthroughwindows27.Whatshouldyoudoifyoufindheavysmokegoesintotheroom?A.Findtheneareststairandrundown.B.Closethedoorasquicklyaspossible.C.Openthedoorverycarefullyandslowly.D.Escapefromyourroomasquicklyaspossible.28.Wheredoesthispassageprobablycomefrom?A.Asafetyguidebook. B.Atrafficguidebook.C.Asciencefiction. D.Asciencereport.CFarfromthelandofAntarctica(南极洲),ahugeshelfoficemeetstheocean.Attheundersideoftheshelftherelivesasmallfish,theAntarcticcod(南极鳕).Forfortyyearsscientistshavebeencuriousaboutthatfish.Howdoesitlivewheremostfishwouldfreezetodeath?Itmusthavesomesecrets.TheAntarcticisnotacomfortableplacetoworkandresearchhasbeenslow.Nowitseemswehaveananswer.Researchwasbegunbycuttingholesintheiceandcatchingthefish.Scientistsstudiedthefish’sbloodandmeasureditsfreezingpoint.Thefishweretakenfromseawaterthathadatemperatureof–1.88℃andmanytinypiecesoficefloatinginit.Thebloodofthefishdidnotbegintofreezeuntilitstemperaturewasloweredto–2.05℃.Thatsmalldifferenceisenoughforthefishtoliveatthefreezingtemperatureoftheice-saltmixture.Thescientists’nextresearchjobwasclear:Findoutwhatinthefish’sbloodkeptitfromfreezing.Theirsearchledtosomereallystrangethingmadeupofaprotein(蛋白质)neverbeforeseeninthebloodofafish.Whenitwasremoved,thebloodfrozeatseawatertemperature.Whenitwasputback,thebloodagainhaditsantifreezequalityandaloweredfreezingpoint.Studyshowedthatitisanunusualkindofprotein.Ithasmanysmallsugarmolecules(分子)heldinspecialpositionswithineachbigproteinmolecule.Becauseofitssugarcontent,itiscalledaglycoprotein.Soithascometobecalledtheantifreezefishglycoprotein.29.Whatisthetextmainlyabout?A.TheiceshelfaroundAntarctica.B.ProtectionoftheAntarcticcod.C.TheterribleconditionsinAntarctic.D.Aspecialfishlivinginfreezingwaters.30.WhycantheAntarcticcodliveatthefreezingtemperature?A.Itlovestoliveintheice-saltmixture.B.Aspecialproteinkeepsitfromfreezing.C.Theseawaterhasatemperatureof–1.88℃.D.Itsbloodhasatemperaturelowerthan–2.05℃.31.Whatdoestheunderlinedword“it”inparagraph5referto?A.Thefish’sblood. B.Thesugarmolecule.C.Anewlyfoundprotein. D.Atypeofice-saltmixture.32.Whatdoes“glyco”intheunderlinedword“glycoprotein”inthelastparagraphmean?A.Sugar. B.Ice. C.Blood. D.Molecule.DAnewcollectionofphotosbringsanunsuccessfulAntarcticvoyagebacktolife.FrankHurley’spictureswouldbeoutstanding—undoubtedlyfirst-ratephoto-journalism—iftheyhadbeenmadelastweek.Infact,theywereshotfrom1914through1916,mostofthemafteradisastrousshipwreck