2025届天津市南开区南开中学高三第二次模拟考试英语试卷含解析

2025届天津市南开区南开中学高三第二次模拟考试英语试卷注意事项1．考生要认真填写考场号和座位序号。2．试题所有答案必须填涂或书写在答题卡上，在试卷上作答无效。第一部分必须用2B铅笔作答；第二部分必须用黑色字迹的签字笔作答。3．考试结束后，考生须将试卷和答题卡放在桌面上，待监考员收回。第一部分（共20小题，每小题1.5分，满分30分）1．Itwaswarmandnicethatevening.Istayedawakeuntileleveninordertohaveagoodlookatthemoonbymyself.A．onaverageB．onpurposeC．onbusinessD．ontime2．Thiscourseisofgreatinteresttostudents,_____toimprovetheirwritingskills.A．hopeB．tohopeC．hopingD．hoped3．_______travellingexpensesrisingalot,wehadtochangeallourplansforthetour．A．As B．By C．Since D．With4．Ithinkyou’vegottothepointachangeisneeded,otherwiseyou’llfail.A．when B．which C．where D．there5．Andrewlivesaloneandenjoysthecompanyofapetcat_______he’sgrownsofond.A．which B．inwhichC．ofwhich D．when6．—Youwerenotlistening；whattroubledyou?—Imycomingmathexam．A．amthinkingabout B．wasthinkingabout C．hadthoughtabout D．willthinkabout7．Theyhaveleadingexpertsinthisfield，andthat's__________they'vemadeimportantprogress．A．where B．whyC．whether D．who8．Mymobilephoneismissing.Whoit?A．musthavetaken B．musttakeC．couldhavetaken D．couldtake9．It’simpossibleforallthepeopletogetjobsbecause______ofthemisnotfitforthem.A．everyone B．allC．notall D．none10．Ourcountryhaslaunchedacampaigntobansmokinginpublicplaces,whichwithsomeheavysmokers.A．concernsB．wasconcernedC．concernedD．isconcerned11．Newly-builtwoodencottageslinethestreet，___________theoldtownintoadreamland.A．turned B．turningC．toturn D．havingturned12．Muchtomy______,myvocabularyhasexpandedagreatdeal.A．delighting B．delighted C．delight13．—________thewomanwiththebabycomeover?Wehaveaseathere.—Thankyou,sir.ActuallyIdohavemyseathere.Butmybabylikestolookoutofthewindow.A．Would B．ShallC．Must D．May14．It'sgreatthatallthevisitorswho

ontheislandweresaved.A．trapped B．havebeentrappedC．hadtrapped D．hadbeentrapped15．Annsaidwheneverherfatherwasunhappyhe________gooutandbuysomething,usuallysomethinglargeanduseless.A．should B．couldC．would D．might16．TheGamesareknownasthefriendlygamesbecauseoftheir________onkindnessandmutualrespect.A．lacks B．focusesC．challenges D．researches17．Totellthetruth,IwouldratherI________thepaininsteadofyou.Youdon’tknowhowworriedIwas.A．took B．hadtakenC．havetaken D．shouldhavetaken18．We’llbuildapowerstation______waterresourcesareplentiful.A．where B．inwhichC．which D．that19．Itwassonoisythatwehearourselvesspeak.A．couldn’t B．shouldn’tC．mustn’t D．needn’t20．Weclimbeduptothetopofahill,___________wegotagoodviewofthewholeforestpark.A．which B．whereC．when D．that第二部分阅读理解（满分40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。21．（6分）Whenweseeapersonintrouble,thefirstideathatcomestoourmindistolendahand.Butwhatifweseeananimalintrouble,doesthesameruleapply?Thisquestionwasraisedafteragroupofpenguinsweresavedfromanicygully（峡谷）inAntarctica.ItwasfilmedfortheBBCwildlifeseriesDynasties.Thefilmcrewwereanxiouswhentheysawthatagroupofpenguinshadfallenintoagullyandbeentrappedwiththeiryoung.Theybuiltaslope（斜坡）sothatafewofthepenguinscouldsavethemselves.Thecasehastakentheinternationalmediabystorm.Viewerswatchingthisfilmletoutasighofrelief.“I’msoglad.Iunderstandnottakingactiondirectly,butahelpinghandisn’tbothering,right?”viewerKathrynShawsaidonherFacebook.However,othersthinkhumaninterference（干涉）isunnatural.“Youcan’thavesunshinethroughoutyourlife.Tohavedoneanythingelsewouldonlymakemattersworse,”saidtheshow’screatorDavidAttenborough,accordingtoTheTimes.Inthiscase,however,MikeGunton,theexecutiveproduceroftheseries,saidthatthiswasaone-offsituation.“Therewerenoanimalsgoingtosufferbyinterfering.Youweren’ttouchingtheanimalsanditwasjustfeltbydoingthis...theyhadthechancenottohavetokeepslippingdowntheslope,”hetoldtheBBC．SuchcasesarefamiliartoPaulNicklen,wildlifephotographerforNationalGeographic.HetoldMetro,“Ifit’severapredator（捕食者）situation,nomatterhowgut-wrenching,youstayoutoftheway.Evenwhenyou’rewatchingamalepolarbeareatababybear.”“There’snorulebookinthosesituations.Youcanonlyrespondtothefactsthatarerightthereinfrontofyou,”WillLawson,theshow’sdirector,toldDailyMail.1、Whathasledtoaheatedmediadiscussion?A．People’svariousremarksonpenguins. B．Therescueofpenguinsfromagully.C．Somepenguins’sufferingsinagully. D．WaysoffilmingtheseriesDynasties.2、Whoholdsapositiveattitudetowardshumaninterference?A．KathrynShaw. B．WillLawson.C．PaulNieklen. D．DavidAttenborough.3、Whichofthefollowingbestexplainstheword“gut-wrenching”underlinedinparagraph6?A．Puttingoneinplace. B．Makingoneconfused.C．Puttingoneindanger. D．Makingoneheartbroken.4、Whatcanbeasuitabletitleforthetext?A．ReasonsfortheNecessityofLendingaHandtoAnimalsB．SuggestionsonHowtoProtectAnimalsFromDangerC．EffectsofHumanInterferenceonDangerousAnimalsD．OpinionsonWhethertoHelpAnimalsinTroubleorNot22．（8分）EarlyexcitementaboutthenextgenerationoftheiPhoneisbuildingmonthsaheadofanexpectedautumndebut(问世).AnalystsexpectAppletoreleasethreeiPhonesthisyear,buttheonegettingthemostattentionisarumoredsuper-premiummodeltocelebratetheiPhone'stenthanniversary.And,forthatphone,AppleisexpectedtochangethetypeofscreentheiPhoneuses.Here'saquicklookatwhatyouneedtoknowaboutwhatitmeansifAppleswitchesfromitscurrentliquidcrystaldisplay(LCD)screenstoatypeoforganiclight-emittingdiode(OLED)screencalledAMOLED．TheessentialdifferencebetweenanLCDscreenandanAMOLEDoneisthepresenceofabacklight.Thankstothatdifference,AMOLEDscreenscanbeverythin,whichmeansyoucanmakethinnerproducts.Theyalsoprovidemorevividcolors,whichisareasonthattelevisionmakershavebeenpushingOLEDinitsvariousformsfortheirbigscreens.AMOLEDscreens,inparticular,boast(夸口)evengreatercontrolovereachindividualpixel（像素）—whichmeansbettercontrastfortheviewer.Thesescreenscanalsoimprovebatterylife.Becausethere'snobacklight,AMOLEDscreenscanbemoreenergy-efficientwhentheuserisviewingdarkersubjects,allowingthephonetoshutoffpixelsandstopdrawingpower.Sowhyhasn'tAppleswitchedtoAMOLEDyet?Afterall,ApplecompetitorssuchasSamsungandLGalreadyhavethesescreensontheirsmartphones.AMOLEDscreensarenotcheaptoproduce.It'salsonotthateasytomakethecomplexAMOLEDscreens,whichcouldexplainwhymostApplefansexpectthatonlythehighest-endphonewillhavethenewscreen.Andthenthere'sthecost.TheswitchtoAMOLEDhasalsobeencitedasareasonthatthepriceofthehigh-endiPhonemayjumpabovethe$1,000mark.Beauty,eveninamass-producedworld,doesnotcomecheap.Still,theexpensemaybeworthit,especiallyaspeopleshootmorephotosandvideos.1、Accordingtothepassage,whenwilltheiPhone’stenthanniversarymostprobablybeheld?A．InJune.B．InMarch.C．InNovember.D．InJanuary.2、AccordingtomostApplefans,AMOLEDscreenswillonlybeusedon________thisyear.A．thecheapestiPhonesB．themostmassiveiPhonesC．thehighestiPhonesD．themostexpensiveiPhones3、Whatdoestheunderlinedsentenceindicate?A．Itisveryexpensivetobecomebeautiful.B．Everythinghasaprice.C．Themoreyoupay,themorebeautifulyouwillbecome.D．Practicemore,andyouwillbecomebetter.4、What’stheauthor’sattitudetowardstheexpectediPhone?A．Negative.B．Critical.C．Positive.D．Uninterested.23．（8分）Phonebatteriesrarelylastafulldayanymore,socarryingcompactchargers(小巧的充电器)isbecomingnormal.Butmanyoftheseso-calledportabledevicesareheavy,thickandinconvenient—untilSolarPaperisdeveloped.Chicagoengineershavedesignedasuper-thin,lightweightpanel(面板)calledSolarPapercapableofcharginganiPhoneintwohoursandmanypanelscanbecombinedtoboostitspower.ItwascreatedbyChicago-basedYolk.Afterraisingmorethan$1milliononlinefortheproduction,itisnowavailabletopurchasethroughoutthecountry.Itcomesinfourversions—2.5W,5W,7.5Wand10w—dependingontheoutputneededforvariousdevices.Andthesedifferentmodelsarecreatedbycombiningindividual2.5Wpanelstogether.A2.5WpanelwillchargeaniPhone6orGalaxyS3infivehours.The5Wversionchargesthesamedevicesbutcutschangingtimetotwohoursorthreehoursifit’scloudy.The7.5WmodelSolarPaperchangesthedevicesinthesametimeasthe5Wversionbutproducesmoreenergywhenitiscloudy.The10Wversionisideal(理想的)fortheiPadAir2,andwillchargeadevicein2.5hours.Eachindividualpanelmeasures3.5inches×6.7inches×0.6inches,weighs60gand1.5mmthick.Otherfeaturesincludeauniqueautomaticreset(重置)functionwhichstopsandstartsthePaperchargingwhencastwithashadoworplacedinsunlight.Othersolarchargersrequireyoutore-plugthewireattheseconditions.Italsohasalow-energyLCDscreenthatdisplaystheamountofpowertheSolarPaperproducesinrealtime.1、Whatdoestheunderlinedword“boost”inthesecondparagraphmean?A．Balance.B．IncreaseC．Possess.D．Reduce.2、HowisSolarPaperdifferentfromothersolarchargers?A．Itcanbecarriedwhereveryougo.B．Itcanproducemoreelectricity.C．Itcanproducepowerevenifit’srainy.D．Itcangetreconnectedautomaticallyafterashadow.3、Whatistheauthor’spurposeinwritingthetext?sA．Tointroducethestrengthsofsolarchargers.B．TopraiseChicagoengineersfortheirefforts.C．Tointroduceanewtypeofsolarcharger.D．Toadviseproducerstomakephonebatterieslastlong.4、WhatcanweknowabouttheSolarPaper?A．YolkstartedanonlineactivitytofundproductionofSolarPaper.B．CustomersareabletobuySolarPaperallovertheworld.C．The7.5WversionisthebestchoiceifuserschargeaniPad.D．TheLCDscreenshowshowmuchcurrentaniPhoneuses.24．（8分）Theorderlycamebackinafewminuteswitharifle（步枪）andsomeBurmans.Hetoldusthattheelephantwasinthericefieldsbelow,onlyafewhundredyardsaway.AsIstartedforwardpracticallythewholepopulationofthequarterflockedoutofthehousesandfollowedme.TheyhadseentherifleandwereallshoutingthatIwasgoingtoshoottheelephant.Itwasfuntothem,asitwouldbetoanEnglishcrowd;besides,theywantedthemeat.Itmademealittleuneasy.Ihadnointentionofshootingtheelephant—Ihadmerelysentfortherifletodefendmyself—anditisalwaysuneasytohaveacrowdfollowingyou.Imarcheddownthehill,lookingandfeelingafool,withtherifleovermyshoulderandanever-growingarmyofpeopleknockingandpushingatmyheels.Beyondthehutstherewasaricefieldathousandyardsacross,muddyfromthefirstrains.Theelephantwasstandingeightyardsfromtheroad.Hetooknottheslightestnoticeofthecrowd.Hewastearingupbunchesofgrass,beatingthemagainsthiskneestocleanthemandfeedingthemintohismouth.AssoonasIsawtheelephantIknewwithperfectcertaintythatIoughtnottoshoothim.Itisaseriousmattertoshootaworkingelephant—itiscomparabletodestroyingahugeandcostlypieceofmachinery.There,peacefullyeating,theelephantlookednomoredangerousthanacow.IthoughtthenandIthinknowthathisattackof“must”wasalreadypassingoff,inwhichcasehewouldmerelywanderharmlesslyabout.Moreover,Ididnotintheleastwanttoshoothim.ButatthatmomentIglancedroundatthecrowdthathadfollowedme.Itwasanimmensecrowd,twothousandattheleastandgrowingeveryminute.Ilookedattheseaofthefacesabovethecolorfulclothes—facesallhappyandexcitedoverthisbitoffun,allcertainthattheelephantwasgoingtobeshot.Theywerewatchingmeastheywouldwatchamagicianabouttoperformatrick.Theydidnotlikeme.ButwiththemagicalrifleinmyhandsIwasmomentarilyworthwatching.AndsuddenlyIrealizedthatIshouldhavetoshoottheelephantafterall.ThepeopleexpecteditofmeandIhadgottodoit;Icouldfeeltheirtwothousandwillspressingmeforward.AnditwasatthismomentthatIfirstfeltthehollowness,theuselessnessofthewhiteman'scontrolintheEast.HerewasI,standinginfrontoftheunarmedcrowd—seeminglytheleadingactor;butinrealityonlyapuppet(傀儡).Iunderstoodinthismomentthatwhenthewhitemanturnsrulerofcompletepoweritishisownfreedomthathedestroys.1、Thepeopleweregladtothinktheelephantwastobeshotmainlybecause______.A．ithaddamagedtheirhomesandcropsB．itwouldprovidethemwithmeatC．itwouldmakethemfeelentertainedD．itwasspoilingtheirricefields2、Whenthewritersawtheelephanthefelt.A．foolish B．afraid C．pitiful D．confident3、Thewriterrealizedthathehadtoshoottheelephantbecause.A．shootingelephantsisaseriousproblemB．everybodyexpecteditofhimC．hedidnotwishtodisappointtherulersD．hehadtoshowhowgunsarefired4、Whatdoesthewriterintendtotellsuswhenhetellsthestory?A．Leadingactorsaresometimesfoolishpuppets.B．Governmentforwhitepeopleareuseless.C．Powercansometimesturnpeopleimprisoned.D．Unarmedcrowdsareincontrolofeverything.25．（10分）NatalieTraylingisafamousstreetartistinMelbourne.Atfirst,thosewhohappenedtopassbyherandsparesomechangedidn’tevenrealizewhatamusicalgeniuswasplaying.TheemotionaltunewasnotonlymasterfullyplayedbutalsocomposedbyNatalieherselfwhenshewasonly14.Gradually,aslongassheappears,peoplewillstop,absorbedinhermusic.Hermusicmakesyouthinkaboutcalmness,thegoodthingsinlife,andnevergivingup.Butwhatpeopledonotknowisthatbehindthebeautifulmusicoftheoldwoman,itisfullofbitterness.Attheageof12,shewonamusicscholarshipatSantaMariaCollege.At15sheknockedbackascholarshiptotheRoyalAcademyofMusicinLondonbecauseherparentscouldn’tpaynon-tuitioncosts.Whensheleftschool,shetaughtpianoatSantaMaria.Latershemetherhusband,Denis.Theyhadfourchildren,butthetwoofthemdied.In1984,Denisaskedforadivorce.Natalie’sson,Nathan,wasgivenmedicationfordepression.NatalielivedeitheroutdoorsinRoyalParkorinboardinghousesfornineyears.Inlate2003Nataliecollapsedwithanaemia(贫血)andwashospitalizedforsixmonths.Forhalfacentury,Nataliehasbeenteasedbyfate.Butevenso,shenevergaveupherloveformusic.Whenaskedwhythemusicwassoimportanttoher,shesaid:“Musiciseverything.Idofeelpartofit.Thewholeworldismusic.”WhenNataliewentontheInternet,shebecameasignofMelbourne.Peopleareimpressedbyherpersistenceindreamsandtheoptimismoflife.Nowsheisnolongerwanderingaround.Shecanplaythepianoatanytime,butaslongastheweatherisgood,shewillwalktothestreetsofMelbourne,andplayatouchingmelodyfortherushofthecity.1、WhyisNatalie’smusicsotouchingtothepassers-by?A．Itisfullofbitterness.B．Shecomposeditherself.C．It’sareflectionofherownlife.D．Itremindsofthebeautyoflife.2、Whichofthefollowingcanreplacetheunderlinedword“knockedback”inParagraph2?A．gaveupB．obtainedC．acceptedD．wasawarded3、WhatdoesmusicmeantoNatalie?A．It’sherhobby.B．It’sthesourceofhermisfortune.C．Itispartofherlife.D．It’sawaytoearnaliving.4、Whatdoestheauthortrytotellus?A．Natalieisamusicalgenius.B．Lifeisnoteasyforeveryone.C．Nevergiveuphalfway.D．Nataliehasastrongandbraveheart.第三部分语言知识运用（共两节）第一节（每小题1.5分，满分30分）阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项．26．（30分）IamavolunteerintheFriendlyVisitingProgram.Ivisita(n)1whodoesnotseem2becausehersonandgrandchildrenliveupstairswithher.3,shehasaspecialdiseaseand4thisconditionshecannot5thehousealone.Forwhateverreasons,herfamilyistoonervousor6totakeheroutofthehousewithheroxygentank.IwilladmitatfirstIwas7too!Butsheisafiercelyindependentladyandcan8itwithease.Sinceherlonelinesscomesfromstaying9solong,wemeetabouteveryotherweek.WegotoIHOPandIgetto10heramazingstoriessuchaswhenshefirstmovedtoBostonfromIreland,11shefirstmetherhusbandandaboutherlargefamily.Sheoften12attheendofourmeetings,sayingIhadno13tocutin.IamachattypersonbutwithherallIwanttodois14.Often,herfamilymembershaveheardthese15andmaytakethemforgranted,butformetheyare16andinteresting.WeoftenstayatIHOPfor2hours17thefreeflowingcoffee.ItisnicetoknowthatwhenIdropherbackoffathomesheisnot18lonely.ButIalsoseethereal19ourmeetingsmake.Therehavebeentimeswhen,becauseofher20issues,wehavenotseenoneanotherforamonthortwoandwemisseachotherterribly.Ifeelveryluckytohaveafriendlikeher.1、A．teacherB．gentlemanC．doctorD．elder2、A．friendlyB．happyC．lonelyD．kind3、A．ThereforeB．HoweverC．OtherwiseD．Instead4、A．duetoB．insteadofC．beyondD．outof5、A．occupyB．repairC．leaveD．decorate6、A．eagerB．gladC．shockedD．inconvenient7、A．painfulB．nervousC．carefullyD．voluntary8、A．finishB．handleC．faceD．cure9、A．indoorsB．silentC．upstairsD．healthy10、A．tellB．writeC．hearD．record11、A．whyB．thatC．whichD．how12、A．apologizesB．complainsC．criesD．responds13、A．placeB．desireC．chanceD．doubt14、A．laughB．listenC．sitD．speak15、A．storiesB．songsC．suggestionsD．poems16、A．familiarB．newC．similarD．necessary17、A．givingawayB．lookingforwardtoC．focusingonD．takingadvantageof18、A．completelyB．possiblyC．regularlyD．truly19、A．troubleB．progressC．differenceD．adjustment20、A．marriageB．familyC．addressD．health第二节（每小题1.5分，满分15分）阅读下面材料，在空白处填入1个适当的单词或括号内单词的正确形式。27．（15分）TheGardenMyfatheralwayshadagarden.Heoncefoundaplotevenwhenwelivedinthehousewithsomeoneelse.Theyalways1．(appreciate)thevegetablesheprovidedinexchange2．hisuseofthegardenplot.Thevegetableswereveryimportanttoourfoodsupplybuthe3．(probable)wouldhavehadagardenanyway.Hewasfromalargefamilywith11brothersandsisters4．hadlearnedtodependonagardenforadequatefood.Eachyearinearlyspring,heusedasmallpushplow(犁)5．(prepare)thesoilfortheplantsandseeds.Healwayshad6．(tomato),peppersandwatermelons.Onesummerwatermelonscameupfrom7．wehadthrewtheseeds.Hebuilt8．shelfforthemelonstorestonwhiletheygrewverylarge.Thisbecametheconversationoftheneighborhood.InthefallDadwouldremoveallofthe9．(die)plantsandsowturnip(萝卜)seedsoverthewholeplotthatwouldprovideturnipsformostofthewintermonths.Inlateryearswhenwehad10．(we)ownhomeheaddedaflowergarden.HisprizeflowersenteredtheFayetteCountyFaireachyear.第四部分写作（共两节）第一节短文改错（满分10分）28．（10分）假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。删除：把多余的词用斜线(＼)划掉。修改：在错的词下画一横线，并在该词下面写出修改后的词。注意：1、每处错误及其修改均仅限一词；2、只允许修改10处，多者（从第11处起）不计分。Traintravelisquiteadifferentexperiencetoday、LittlethingscanmatchChina’shigh-speedrailsystem,especiallythespeedatthatitisstilldeveloping、Thespeedknownas“Chinaspeed、”Chinaspeedmeansalotoftothecountry、Thepast30yearshadseenChina’srapiddevelopmentinvariousareas,likeeconomyandtechnology、Wehaveseendozensoftallbuildingspringupalmostovernight,withroadsandhighwaysreachedeverycorner、Besides,mobilepaymentsandonlineshoppingareplayingincreasingimportantrolesineveryone’slife、Withsogreatachievements,Chinaspeedisnowamodeladmiredbyawholeworld、第二节书面表达（满分25分）29．（25分）假设你是红星中学高三学生李华。北京冬奥组委会正在招募志愿者，其职责为接待各国运动员及宣传中国文化，组委会要求志愿者能够熟练运用英语，请你用英文写一封申请信。内容包括：1.申请原因2.你的优势3.相关经历注意：1.词数不少于502.开头结尾已给出，不计入总词数DearSir/Madame,IhavelearnedthatvolunteersforBeijingWinterOlympicGamesareneeded._______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Yourssincerely,LiHua

参考答案第一部分（共20小题，每小题1.5分，满分30分）1、B2、C3、D4、C5、C6、B7、B8、C9、B10、D11、B12、C13、A14、D15、C16、B17、B18、A19、A20、B第二部分阅读理解（满分40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。21、1、B2、A3、D4、B22、Iceclimbingisadynamicwintersportthatcombinesexcitement,techniqueanddetermination.Backin2014,thesportwaspresentedtothepublicduringtheSochiWinterOlympicGamesinRussia.Thenextgoalforiceclimbingisshowcasingthesportin2018PyeongchangOlympicWinterGamesbeforeit'sincludedin2022BeijingWinterOlympicGames.Ifyouarealreadyhookedonthissport,herearesomeoftheworld'sbestplaceswithepiciceformationsthatyoushouldn'tmiss.Ouray,Colorado,USKnownasthe"SwitzerlandoftheUS",Ourayoffersclimberseasyaccesstomorethan200namedclimbs,withfreeentrancetothepark.Theiceparkalsooffersguideandinstructionalservicesforbeginners.OurayusuallyhoststhebiggesticefestivalinNorthAmericaeveryJanuary.Shuangqiaogou,Sichuan,ChinaChinahasalotoficewalls,whicharelocatedindifferentmountainsinthenorthernandwesternpartsofthecountry.Amongthem,Sichuanprovince'sShuangqiaogou,orTwinbridgeTrench,inMountSig