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钛和钛合金广泛应用于我国的航天航空工业，如图为某化工企业生产流程示意图： 【查阅资料】钛、镁在高温下与空气中的氧气、二氧化碳等反应． （1）反应①进行前要将钛酸亚铁等原料粉碎，粉碎目的是 ...
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具有密度小抗腐蚀性能好广泛应用于航天飞机船舶化工等方面的一种新型金属材料是
铝和铝合金
钛和钛合金
铁和铁合金
铬和铬合金
钛合金具有耐腐蚀性密度小等优越性能广泛应用于航空和造船工业
关于俄罗斯工业叙说正确的是
以农业为主
航天航空工业发达
工业分布均匀
轻重工业都发达
在石油化工企业蓄热式换热被广泛应用于生产中
钛和钛合金被认为是21世纪最重要的金属材料广泛应用于航空航海等领域.在一定条件下钛由四氯化钛TiCl
俄罗斯在世界上占有重要地位的产业是
农业
轻工业
食品工业
核工业和航天航空工业
钛和钛合金被认为是21世纪的重要金属材料被广泛应用与火箭航天飞机船舶和化工等．已知钛原子的质子数为
48
26
4
22
近年来为满足某些尖端技术的发展需要人们又设计和合成了许多新型合金材料如储氢合金是一类能够大量吸收氢气
金属材料在日常生活工农业生产及航天航空中使用非常广泛下列叙述中正确的是
钢是性能优良的纯铁
在铁制水龙头表面镀铬只是为了美观
焊锡是锡铅合金，其熔点远低于锡、铅的熔点，因此，焊锡不宜用于焊接金属熔点：焊锡 70℃、锡232℃、铅 327℃
钛和钛合金熔点高、密度小、机械性能好且抗腐蚀性能远优于不锈钢，因而被广泛应用于火箭、导弹、航天飞机等
钛和钛合金被认为是21世纪的重要金属材料被广泛用于火箭导弹航天飞机船舶等如图为某化工企业生产钛流程示
目前国内最广泛应用于金-瓷修复体中的金属是
金合金
银钯合金
镍铬合金
钛合金
钴铬合金
钛合金是一种重要的合金材料广泛应用于各个领域下列各种用途中你认为不合实际的用途是
用于制作保险丝
用于发展航空发动机
用于制成人造骨骼
用于发展航空飞机的机体材料
下列关于钛及钛合金的说法不正确的是
钛被认为是21世纪的重要金属
钛合金具有优良的抗腐蚀性能
钛合金已广泛用于航天、船舶等工业中
钛的密度大，这是钛的缺点
俄罗斯在世界上占有重要地位的产业是
农业
轻工业
食品工业
核工业和航天航空工业
钛和钛合金被认为是21世纪的重要金属材料它们具有熔点高密度小抗腐蚀性能好等优良性能因此被广泛应用于火
48
26
22
4
对于下列金属铝铜锌钛铁钙①可用来冶炼高熔点得金属是②可用于制干电池的是③白铁表面所镀的金属是④广泛用
钛和钛合金被认为是21世纪的重要金属材料具有熔点高密度小抗腐蚀性能好等优良性能因此被广泛应用与火箭航
48
26
4
22
被广泛应用于做人造卫星和宇宙飞船天线的是
钛镍记忆合金
硬铝
铝合金
白铜
对于下列金属铝铜锌钛铁钙①可用来冶炼高熔点得金属是________②可用于制干电池的是_______
氮化硅Si3N4是一种新型陶瓷材料的主要成分能承受高温可用于制造航天航空工业等氮化硅属于
金属单质
非金属单质
化合物
混合物
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YoursisterTinaissleepinginthebedroom.Pleasewalk
8分InItalyasmallbusinessmanowedalargesumofmoneytoaloan﹣shark高利贷者.Theloan﹣sharkwasaveryolduglyguythatfanciedthebusinessman'sbeautifuldaughter.Hedecidedtoofferthebusinessmanadealthatwouldcompletelywipeoutthedebt.Howeverthecatchwasthatthedebtwouldonlybewipedoutifhecouldmarrythedaughter. Needlesstosaythisproposalwasmetwithalookofdisgust.Solaterthecunningmoney﹣lendersuggestedlettingGoddecide.Hesaidhewouldplacetwopebblesintoabagonewhiteandoneblack.Thedaughterwouldreachintothebagandpickoutapebble.Ifitwasblackthedebtwouldbewipedbuthewouldmarryher.Ifitwaswhitethedebtwouldalsobewipedbutthedaughterneedn'tmarryhim. Standingonapebble﹣coveredpaththeloan﹣sharkbentovertopickpebbles.Whenhewaspickingthemupthedaughternoticedthathe'dpickeduptwoblackpebblesandplacedthemintothebag.Hethenaskedhertopickone. Thedaughternaturallyhadthreechoices:refusetopickapebblefromthebag;takebothpebblesoutofthebagandexposetheloan﹣sharkforcheating;pickapebblefullywellknowingitwasblackandsacrificeherselfforherfamily. Shedrewoutoneandbeforelookingatitaccidentallydroppeditontothepebble﹣coveredpathwhereitimmediatelybecamelostamongotherpebbles.Thenshesaid:Ohsorry!HowclumsyIam!ButnevermindifyoulookintothebagfortheoneleftyouwillbeabletotellwhichpebbleIpicked. Thepebbleleftwasobviouslyblackandastheloan﹣sharkdidn'twanttobeexposedhehadtoplayalongasifthepebblethedaughterdroppedwaswhiteandclearedherfather'sdebt. 1Whatcanwelearnfromthepassage A.ThegirlbelievedGodwouldcometoheraid. B.Thegirlwaswillingtosacrificeforhisfamily. C.Theloan﹣shark'sdishonestywouldbeexposed. D.Theloan﹣shark'sfirstproposaldidnotwork. 2Whichofthefollowingbestdescribesthedaughter A.Socialandobedient. B.Well﹣educatedandsharp﹣eyed. C.Charmingandquick﹣minded. D.Adventurousandgood﹣mannered. 3WhydidthegirlsayOhsorry!HowclumsyIam! A.Shewaseagertoshowasenseofhumor. B.Shewantedtoextendhersincereapology. C.Shetriestomakeupanexcuseforherdeed. D.Sheintendedtomakefunoftheman'sdishonesty. 4Whatisthemainideaofthepassage A.Theevilwillnotwinoverthevirtuous. B.Parentsshouldn'tsacrificechildrenfortheirinterest. C.Peopleshouldn'tgotoofaranddriveothersintoacorner. D.Onecanturntoone'swisdominthefaceofdifficulty.
6分KidsConnectisacampspecificallyforchildrenwithphysicalandmildintelligencedisabilitiesaged9﹣16Singleconsiderationgiventothoseovertheageof16.ItisheldinBlockhouseBayAuckland.Occasionallywerequiremeetingachildbeforecamptoensureweareabletomeettheirneedsduringthecamp.Acceptanceisnotautomaticbutatthedecisionofthecampdirector.Ourcampsareconductedbyexperiencedstaff.Wetakeeveryefforttogiveyourchildrenasafeandenjoyableweekend.Ouraimisthateverychildcomesawaywithlastingmemoriesofwhattheyhaveexperiencedexploredandenjoyedatourcamp.Wefocusonbuildingstronghealthyrelationshipswithotherchildrenwithandwithoutphysicaldisabilitiesandwithgroupleaders.Wehaveaweekendpackedfullofactivitiesactionandfun.●Teamgamesandcompetitionssongs●Cross﹣countryraceonawheelchairaccessibletrack●Motorcycling●Processdesign●Discussionsgreatfoodandloadsoffun!Thecampfeeisapproximately﹩135subjecttochange.WealsoacceptpaymentbywayofMinistryofHealthcarersupportforms.Dayvisitsandratescanbeorganizedonapersonalbasisifafullweekendstayisunsuitable.Foraregistrationformorformoreinformationpleaseemailinfo@cbm.org.nzorphone096305271KidsConnectBox8774SymondsStreetAuckland1150Website:www.cbm.org.nz1WhoisthetextmainlywrittenforA.Outdoorenthusiasts.B.Internationaltravelers.C.Teenagers.D.Parents.2WhatcanchildrendoatthecampA.Learntocook.B.Enjoyoutdooractivities.C.Practicefavoritehobbies.D.Carryoutresearchactivities.3WhatisthemainpurposeofthetextA.Toattractchildrentothecamp.B.Toexplaintheaimofthecamp.C.Totalkaboutcampingexperiences.D.Todescribetheprogramsofthecamp
—Whycanafrog青蛙Jumpas asatree?—Becausethetreecannotjump A.high B.higher C.tall D.taller
10分MovieshavedocumentedAmericaformorethanonehundredyears.SinceThomasEdisonintroducedthemoviecamerain1893amateurandprofessionalmovie﹣makershaveusedmovingpicturestotellstoriesandexplaintheworkofbusinessandgovernment.1Bypreservingthesemovieswewillsaveacenturyofhistory. Unfortunatelymoviesarenotmadetolast.2Alreadythelossesarehigh.Only20%ofUSfeaturefilmsfromthe1910sto1920ssurvive.OftheAmericanfeaturesproducedbefore1950abouthalfexist.Forindependentlyproducedworkswehavenowayofknowinghowmuchhasbeenlost. Formanylibrariesandmuseumsthehardeststepinpreservingmoviecollectionsisgettingstarted.TheMoviePreservationGuideisdesignedfortheseorganizations.3Theseinstitutionshavecollectionsofmovingpicturesbutlackinformationabouthowtotakecareofthem.Theguidecontainsbasicfactsforbeginners﹣professionalstrainedinhistorybutunschooledinthistechnicalarea. TheguidegrewfromuserworkshopsatDukeUniversity.Atthesessionsbeginnerstalkedwithtechnicalexpertsaboutwhattheyneededtoknowtopreserveandmakeavailabletheirmoviecollections.4 Followingtheadvicetheguidedescribesmethodsforhandlingandstoringmovingpicturesthatarepracticalforresearchinstitutionswithlimitedresources.5TheguidehasbeentranslatedintoChineseJapaneseandKorean. A.Keepitsimple!wastheadviceofthediscussions. B.They'llbedamagedwithinyearsifnotproperlystored. C.TheseorganizationsarethefirsttosaveAmericanmovies. D.Itisorganizedinchaptersandincludescasestudiesandcharts. E.Itintroducesmoviepreservationtononprofitandpublicinstitutions. F.TheyshowhowgenerationsofAmericanshavelivedworkedanddreamed. G.Theystoretheoriginalmoviesandnewonesundercool﹣and﹣dryconditions.
电冰箱是现代家庭中最常用的家用电器．它内部的电路中主要包括压缩机其主要部件是电动机和冷藏室内的照明灯．压缩机和照明灯能各自独立工作互不影响温控开关S1控制压缩机与冰箱门联动的开关S2控制照明灯．请在指定位置完成电冰箱内部的电路图电源已画出
30分AfterIbecameamotherIcouldn'trememberthelasttimeIhad1timetomyself.Allmysparetimeevolvedintotakingcareofthefamilydoing2andworking.Iguessedthatwaspartof3.OfcourseItookresponsibilityforbeingamotherandtriedmybesttomaximizemytime.But4theyearspassedIrealizedthatthechoressoonseemed5.ItseemedIcouldneverfinishmyto﹣dolist.EvenifItriedtocompleteallofitnewtasksalways6.Itriedtoprioritizemytasksbutstillfelt7attheendoftheday.ItriedtosharetheresponsibilitieswithmyfamilybutIstillhadlittletimetomyself.Ialways8metime.AndwhenIsaidmetimeIonlymeantbeingabletohaveashowerwithout9orwatchingamoviewithoutbeinginterruptedbymykids.ButIdidn'tgivemuchthoughtaboutthatmetimeuntilrecently.Afterlongyearsofwaitingmyvisaapplicationwas10andIhadtotraveltoanew11allbymyselftostartanewjob.Sincethecompanyonlypaidformyairfaremyfamilywouldhavetofollowatan12date.SonowI'm13inanapartmentandIcandowhateverIwant.Butsurprisinglyithasn'tmademehappy.Ifeel14withoutmyfamily.Nomoredaily15ofnagging唠叨thekidstohelpmewiththechores.Ialsofeellikesomethinginmeisappearing.Ispendnightscryingmyselftosleepto16theloneliness.Ihavecometorealizethatmaking17formedoesn'tmeanbeingawayfromthoseIlove.Icanstillhavemetime18Ihavemyfamilyaround.Icanprioritizeandplan.Icanchangemy19andapproachtowardchores.Lifewouldn'tbethe20withoutthepeopleyoulovenearyou.Ihopemyfamilycanjoinmesoon.1A.enough B.spare C.separate D.vacant2A.chores B.business C.exercises D.homework3A.fashion B.family C.motherhood D.responsibility4A.while B.as C.since D.though5A.difficult B.rough C.endless D.tired6A.raninto B.turnedover C.putforward D.cameup7A.exhausted B.released C.confused D.ignored8A.lookedfor B.hopedfor C.askedfor D.demandedfor9A.rushing B.stopping C.waiting D.disturbing10A.achieved B.qualified C.arrived D.approved11A.home B.country C.destination D.company12A.right B.suitable C.later D.exact13A.lonely B.alone C.crazy D.independent14A.annoyed B.confused C.guilty D.sleepy15A.task B.work C.arrangement D.routine16A.press B.recover C.ease D.launch17A.room B.decisions C.choices D.time18A.sothat B.incase C.evenif D.asthough19A.feeling B.attitude C.plan D.direction20A.same B.better C.different D.valueless
三位同学在做用电流表测电流的分组实验中闭合开关前他们的电流表指针均指在零刻度处．当闭合开关试触时发现电流表指针摆动分别出现了如图甲乙丙所示的三种情况．请分析他们在电流表的使用上分别存在什么问题并写在下面的横线上1出现甲图问题的原因电流表的2出现乙图问题的原因电流表的3出现丙图问题的原因电流表的
Ifyouwanttobethinneryouhavetoeat foodandtake exercise. A.fewer;lessB.fewer;moreC.less;lessD.less;more
Thisshirtisquiteexpensiveforme.Doyouhaveacheapone?
如图所示电路闭合开关小灯泡和LED均发光用一根导线接在小灯泡的两端会看到的现象是原因是被短路
如图所示完成电路连接使L1L2并联电流表测通过L2的电流
LilyandIaregoodfriends. ofustakeaninterestinmusic.
如图所示电流表的示数分别为0.45A0.25A则通过灯L1的电流为A通过灯L2的电流为A
如图所示的电路图中能用电流表正确测出灯L1的电流是
15分Inthe17thcenturydentistsdidtheirbest1makefalseteeth.Theproblemhoweverwasnotmakingtheteeth2waskeepingtheminplace.Theyhadtotieeachtoothtotheoneoneithersideofit.Onlyrichpeoplecouldaffordfalseteeth3wereusuallymadeofgoldorsilver.Asmoreandmorepeoplewantednewteethpoorpeople4selltheirteethtotherichsothattheycouldbuyfoodandclothing.Duringthenext200yearsmanychangesweremadetofalseteethalthoughsomeofthesewerenotreallyimprovements.Towardstheendofthe19thcenturyforexamplecheapelasticteethwereintroduced.Buttheycaughtfirevery5easyandanumberofmenwerebadlyburnedwhentheirteethcaughtfirewhiletheyweresmoking6cigarette.Nowadaysfalseteeth7besowellmadeandlooksorealthatitisoften8possibletotellfromaperson'sappearancewhetherornottheyhavethem.Andin9nearfutureveryfewpeoplewillhavethemby10addcertainthingstothewaterwedrinkwehavebeenabletokeepourteethsohealthythatmostpeoplewillneverneedfalseteeth.
8分PinewoodStudiosislocated位于abouttwentymileswestofcentralLondonandnamedafterthepinetreesinthegrounds.PinewoodhasbeenattheheartofbothBritishandinternationalfilmproduction.ThehouseHeatherdenHallwasboughtbyCharlesBootin1934andheandJ.ArthurRankbecamepartnersintheprojecttobuildthestudios.PinewoodprovedpioneeringinitsuseoftheunitsystemthatallowedmorethanonefilmtobemadeatatimeandthisenabledPinewoodtoachievethehighestoutputofallthestudiosintheworld.ThefirstfilmtobecompletedatPinewoodwasTalkoftheDevil1936ReedwhiletheimmediatepostwarperiodsawsixmajorproductionsincludingthepraisedOliverTwist1948LeanandTheRedShoes1948PowellandPress﹣burger.The1950ssawcountlessproductionsincludingtheDoctorseriesandmedicalcomedywhichwerethefatherstotheCarryOnfilms:theseriesstartedwithDoctorintheHouse1954Thomasandledtoafurthersixfilms.Othernotablefilmsofthe1950sageincludeThePrinceandtheShowgirl1957OlivierstarringMarilynMonroeCarveHerNamewithPride1958GilbertNorthWestFrontier1959ThompsonandTheThirty﹣NineSteps1959Thomas.TheThirty﹣NineStepswasareworkingofJohnBuchan'snoveloriginallyfilmedbyHitchcockin1935.BecauseofitsnewideasandskillsAmericanproductioncompaniescrowdedtoPinewoodandamajorreinvestment再投资wasrequired.Duringthe1960sfournewstageswerebuilttoaccommodateeveryaspectoffilmandtelevisionproduction.ThisperiodalsosawthestartoftheassociationbetweenPinewoodandtheJamesBondserieswhichstartedin1962withDrNoYoung.ThestudioshavecontinuedtoproduceimaginativeandtechnicallychallengingmaterialsuchasSuperman1978DonnerSupermanⅡ1980LesterSupermanⅢ1983LesterSupermanⅣ:TheQuestforPeace1987FurieandBatman1989Burton.1HowlongisthehistoryofPinewoodStudios'firstfilmA.About60years.B.About70years.C.Morethan80years.D.Morethan100years.2WhatmadePinewoodStudiosproducemostA.Itsfamousactorsandactresses.B.Puttingtheunitsystemintouse.C.Itsproperlocationandtranslation.D.Theseriousattitudeofitsleaders3WhichfilmwascompletedduringtheearlypostwarperiodA.TheRedShoes.B.TheQuestforPeace.C.TheThirty﹣NineSteps.D.ThePrinceandtheShowgirl.4WhatisthepassagemainlyaboutA.TheupsanddownsofPinewoodStudios.B.ThebestfilmsmadebyPinewoodStudios.C.ThelocationandcharactersofpinewoodStudios.D.ThehistoryandachievementsofPinewoodStudios.
Myhometownisbecomingmoreandmorebeautifulwithtreesandflowersonsidesoftheroad.A. both B. all C.neither D.either
—That'sLisa'snewschoolbag?—Yes.Hermotherboughtitforheryesterdaymorning A.isitB.isn'titC.doesitD.doesn'tit
为了比较不同物质的吸热能力小明做了如下实验．1量取等体积的水和食用油分别放在两只相同的烧杯中用两个相同的热源同时加热如图所示请你指出实验中存在的一个错误．小明纠正错误后通过实验得到的实验数据如表所示．2加热相同时间后水的温度比食用油的温度填高或低3若要使水和食用油升高到相同的温度则需要给水加热填更长或更短的时间此时水吸收的热量填大于小于或等于食用油吸收的热量．4实验表明填水或食用油的吸热能力更强．
如图所示电路中若电流表A1的示数为0.9AA2的示数为0.5A则通过灯L1的电流是A通过灯L2的电流为A
8分Toomuchsalt﹣﹣﹣andnotenoughwholegrainsfruitsandvegetables﹣﹣﹣maybeshavingyearsoffourlivesanewanalysissuggests.InastudypublishedWednesdayintheLancetresearcherslookedatpeople'seatinghabitsacross195countriestoestimatehowmuchpoordietscontributetomortality.Theirfindings11millionpeopledieeachyeararoundtheworlddueatleastinparttocertainfoodsaccordingtothestudy.LeadauthorAshkanAfshinanepidemiologist流行病学家attheUniversityofWashingtonsaidtheresearchersestimatedthatoverallpoordietsareresponsibleformoredeathsaroundtheworldthananyotherriskfactorincludingcigarettesmokingknowntobeoneofthegreatestthreatstopublichealth.Theproblemhesaidisnotonlywhatpeopleareeatingbutalsowhatthey'renoteating.Thestudyestimatedthatglobally3milliondeathswereattributedtotoomuchsodium﹣﹣﹣butanother3milliondeathswereattributedtotoolittlewholegrainsandanother2milliondeathstotoolittlefruit.Expertssayitconfirmswhathealthprofessionalshavebeenteachingforyears﹣﹣﹣abalanceddietisimportantforalonghealthylife.AfshinsaidIsraelwherepeopleeataMediterraneandiet﹣﹣﹣highintakeoffruitsvegetablesnutsandhealthyoilssuchasoliveoil﹣﹣﹣rankedNo.1intermsoftheleastnumberofdiet﹣relateddeaths.FranceandSpainrankedsecondandthird.UzbekistanaformerSovietrepublicwhererefinedcarbohydratessuchasbreadandpastaarestaplesscoredtheworst.BruceLeeassociateprofessorofinternationalhealthsaiddietcancontributetononcommunicablediseaseNCDsviaobesityhighbloodpressureandconditionsthatleadtohighbloodsugarlevelsaddingthatoneproblemisthatunhealthyfoodssuchasthosethatarehighlyprocessedwithartificialingredientsareoftencheapertomakestoreandprepare.Thereforesuchfoodshavereplacedmorenaturalandhealthyfoodsinfoodsystemsaroundtheworld.ButisapoordietreallyresponsibleformoredeathsthanevencigarettesmokingNestlewithNewYorkUniversitysuggestedthatitmakesensethatdietaryrisksarehigherbecauseeveryoneeatsbutnoteveryonesmokes.Soshesaidthatdietisariskfactorforeverybody.1AllofthefollowingmayhaveabadeffectonourhealthEXCEPT.A.HighintakeofsodiumB.ArtificialingredientsC.RefinedcarbohydratesD.Nutsandoliveoil2Fromthepassagewecanknowthat.A.11millionpeopledieeachyearduetofoodproblemsB.diet﹣relateddeathshavealreadybecomeaglobalconcernC.dietaryrisksarehigherthanthosefromcigarettesmokingD.highlyprocessedfoodshavereplacednaturalandhealthyfoods3WhatdoestheunderlinedwordmortalityinParagraph2probablymeanA.Disease.B.Risk.C.Death.D.Threat.4WhatisthebesttitleforthepassageA.BaddietskillmorepeoplethansmokingB.WearewhatweeatC.MorefruitsandvegetablesfewerdeathsD.Abalanceddietmatters
25分假定你叫王明你校校长办公室将于暑假组织一带一路沿线部分国家考察活动你的美国笔友Tom对该活动非常感兴趣请用英语给他写一封电子邮件介绍这次活动内容要点如下: 1.考察内容2项; 2.报名条件; 3.联系方式. 注意:1.词数100左右;短文的开头和结尾已经给出不计入词数; 2.可以适当增加细节已使行文连贯; 3.参考词汇:一带一路theBeltandRoad. DearTom Bestwishes! Yours WangMing
BeibeiisquietbuthisclassmateYaoyaois.
试判断下列各种情况中小灯泡L1和L2的连接情况．开关同时控制L1L2
—Let'sgocampinginthemountainOK? —.I'dliketobreathethefreshair. A.Nevermind B.Notatall C.Soundsgreat D.I'mafraidnot
10分文中共有10处错误每句中最多有两处.错误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:在错的词下划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.Timeflew!It'sapitybecauseyouaregoingbackhomesoon.I'mwritingtoexpressmycongratulationsandgratitudetoyouandinviteyoutoparticipateinthefarewellparty.Tobeginwithcongratulateyouontheprogressesyou'vemadeinChineseduringthisterm!Seenyoureffortspayoffwereallyfeelhappyforyou.MoreoverwemustthankyouforhelpingustoourEnglish.It'sverykindofyoutoanswerourcountlessquestionspatient.Wecouldn'thavemadesogreatprogresswithoutyourhelp.Lastbutnotleastwe'veplannedafarewellpartyforyou.Itwillheldonthethirdfloorofthedininghallstartingat6pmonthisFriday.Itisanopportunitytoenjoyourselvesandhaveabetterunderstandingofeachother.Webothhopeyoucancome!Lookingforwardtoseeingyousoon.
试判断下列各种情况中小灯泡L1和L2的连接情况．流过L1的电流全部流经L2
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