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如图1，将正方形纸片ABCD对折，使AB与CD重合，折痕为EF．如图2，展开后再折叠一次，使点C与点E重合，折痕为GH，点B的对应点为点M，EM交AB于N． （1）tan∠DEH＝ ； （2...
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如图11将正方形纸片ABCD对折使AB与CD重合折痕为EF展开后再折叠一次使点C与点E重合折痕为GH
如图将正方形纸片ABCD对折使边ABCD重合折痕为MN展开纸片再过点B折叠纸片使点A落在MN上的点F
如图将正方形纸片ABCD对折使边ABCD重合折痕为MN展开纸片再过点B折叠纸片使点A落在MN上的点F
将正方形纸片ABCD按如图所示对折使边AD与BC重合折痕为EF连接AE将AE折叠到AB上折痕为AH则
取一张正方形纸片ABCD进行折叠具体操作过程如下第一步先把纸片分别对折使对边分别重合再展开记折痕MN
将一张半径为4的圆形纸片如图①连续对折两次后展开得折痕ABCD且AB⊥CD垂足为M.如图②之后将纸片
如图1将正方形纸片ABCD对折使AB与CD重合折痕为EF如图2展形再折叠一次使点C.与点E.重合折痕
如图把正方形纸片ABCD沿对边中点所在的直线对折后展开折痕为MN再过点B.折叠纸片使点
落在MN上的点F.处，折痕为BE.若AB的长为2，则FM的长为() A.2
1
如图现有边长为4的正方形纸片ABCD点P.为AD边上的一点不与点A.点D.重合将正方形纸片折叠使点B
取一张正方形纸片ABCD进行折叠具体操作过程如下第一步先把纸片分别对折使对边分别重合再展开记折痕MN
如图3先将正方形ABCD对折折痕为EF将这个正方形展平后再分别将A.B.对折使点A.点B.都与折痕E
如图把正方形纸片ABCD沿对边中点所在的直线对折后展开折痕为MN再过点B.折叠纸片使点
落在MN上的点F.处，折痕为BE.若AB的长为2，则FM的长为（ ）
A.2
1
如图1将正方形纸片ABCD对折使AB与CD重合折痕为EF．如图2展开后再折叠一次使点C与点E重合折
如图十的1中ABCD是一张正方形纸片E.F.分别为ABCD的中点沿过点D.的折痕将A.角翻折使得点A
如图1将正方形纸片ABCD对折使AB与CD重合折痕为EF．如图2展开后再折叠一次使点C与点E重合折
将正方形纸片ABCD按如图所示对折使边AD与BC重合折痕为EF连接AE将AE折叠到AB上折痕为AH
如图将正方形纸片ABCD对折使边ABCD重合折痕为MN展开纸片再过点B折叠纸片使点A落在MN上的点F
如图将边长为3的正方形纸片ABCD对折使AB与DC重合折痕为EF展平后再将点B折到边CD上使边AB
如图1将正方形纸片ABCD对折使AB与CD重合折痕为EF．如图2展开后再折叠一次使点C与点E重合折
如图1将正方形纸片ABCD对折使AB与CD重合折痕为EF．如图2展开后再折叠一次使点C与点E重合折
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25分假定你是李华你校组建了游泳俱乐部.请给你的留学生朋友peter写信邀请他加入.内容包括: 1.组建俱乐部的目的; 2.俱乐部的主要活动; 3.报名的时间和地点; 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯. 开头语和结束语己为你写好不计入总词数. DearPeter Howiseverythinggoing﹣﹣﹣﹣ Yoursever LiHua
如图所示电源电压为4.5V电压表量程为0﹣3V滑动变阻器上标有“20Ω1A”字样小灯泡标有“2.5V1.25W”灯丝电阻不变电流表量程为0﹣0.6A要求两电表示数均不超过所选量程灯泡两端电压不允许超过额定值下列说法中正确的是
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. IfoundawalletacoupleofweeksagointhecarwhereIwasrenting.Thewallethadcreditcardsbutquiteabitofcashinside.Thegentlemanitwasbelongedtohappenedtobecelebratinghisbirthdaythatsameday.Iwasabletomailhimhiswallet.AfewweekslaterIreceivethis.JamieIcan'ttellyouhowfortunatelyIfeltwhenIreceivedmywalletsendingbyyou.Itisrarethatsomeonecanreturnawalletletalonereturnwith100%ofitscontent.I'llbethankfulforyouforever.TearsfilledmyeyewhenIfinishedreadinganote.
15分Aninsect1callthefallarmywormhasalreadyeatencropsintheAmericasandAfricaNowitisdoingthesameinAsia.Theyoungwormsareaboutthesizeofaperson'ssmallestfinger.Theycandamagemaize玉米especially2makethevegetablesoftandwet.UrapomNounartis3expertonfarmpestsatThailand'sAgricutureDepartment.Weneverbadthisonebeforeshesays.Thefallarmyworms4findlatelastyearinanareanorthwestofBangkok.It'sabigproblemNounartadded.Thewormscanmakefarmerslosetheirprofits.Tomakematters5badtheyaredifficult6fight.Yetlimitingtheinsectsiscritical.AlthoughAsiaiswell﹣known7itsricegrowingmaizeisalsoamajorcropandanimportantsourceoffoodforchickenscowsandotheranimals.ThefallarmywonnisnativetoanareathatspreadsfromArgentinatonorthernCanada.Theretheinsecthasnaturalenemies8existencehelpstokeepthefallarmywormpopulationatacceptablelevels.Butsuchhelpisnotfoundeverywhere.Expertsnotethat9chemicalagainstthewormsarecostlydangerousanddonotalwayswork.Sosomefarmerswhosufferagreat10loseinThailandaretryingotherwaystofightthefallarmyworms.
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用铅笔可以做很多物理小实验．1如图甲所示手指压铅笔尖手指感到疼因为力的作用是．2如图乙所示用两手指水平压住铅笔的两端．感觉压笔尖端的手指较痛说明在相等时受力面积越小压力作用效果越．3用一根橡皮筋水平匀速拉动放在桌面上的一本书然后在书下垫几支圆铅笔后再拉橡皮筋更短图丙由此得出的结论是．
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10分Throughouthistoryandineveryculturepeoplecry.NowadayspeoplearefacingmoreandmorepressurefromworklifefamilyhealthandloveSometimeswhensadnessreachesacertainlevelcryingisanecessaryconsequence.1PsychologicalcounselorLiJinfromtheYangGuangHuaRenPsychologicalServicesaystheanswerisYes.Weepingisoneofthemechanismsthathumansusetogetridofsometoxins毒素.Tearsmaybeinvolvedinremovingwasteproductsortoxicsubstancesfromthebody.Perhapsthatiswhysomanypeoplesaytheyfedbetteraftercrying.ThechemicalcomponentsoftearsarefarmorecomplexthanonewouldimagineLiJinintroducedaninterestingexperimentconductedbyAmericanscientists.Thescientistsfirsthadsomevolunteerswatchasadmovie.2Latertheyhadthesevolunteerscutonionstoproducetears.Chemicalanalysisafterwardsshowedthatthetearscollectedfromcuttingonionsareverydifferentfromthosecreatedbywatchingasadmovie.Somepeoplemaythinkthatcryingissimplyasignofweaknessorbeingoutofemotionalcontrol.3.Whenyoufeelpressurefrustrationsorroworanger﹣anynegativeemotions﹣youshouldtakeeffectivemeasurestorelievethem.4LiJinaddedthatcryingisjustonewaytoreleasepressure.5Findingtheonethatfitsyoubestisthekeytokeepingastableconfidentandhealthypsychologicalstate.A.Andthentheycollectedtheirtears.B.Cryingisjustanaturalandhealthymeans.C.Butactuallycryingisaformofstressrelief.D.WouldyouusecryingasawaytogainsupportE.Therearemanyalternativesyoucanusetomakeit.F.Thesadmoviefailedtomakethemburstintotears.G.Arethereanyphysicalorhealthbenefitsfromcrying
8分Haveyoueverseensomethingcute可爱likeababydogorababyrabbitandjustwantedtohugittopiecesI'mprellysureyouhave.Whenyouthinkaboutithaturgeiskindofpeculiarmaybeevenalittledangerous. HoweveritturnsouttheIwanttohugyouandsqueezeyoutodeathurgeyoumightfeelwhenyousetsomethingcuteistotallynormal.AstudydoneatYaleUniversityrecentlyexploredthisphenomenonandtheFindingswerepublishedinPsychologicalScience.Theexperimentstudiedwhathappenedwhenpeoplewerepresentedwithcutestimuli刺激. Thestudyfoundthatpeoplewhohavecxtremelypositivereactionstocutebabiesalsodisplayedstrongeraggressiveexpressions.Iknowthatsoundskindofstrangebutwhatthey'resayingisthatpeoplewhowerereallyintothebabieswantedtopresstheircheeksormaybesqueezetheirslightlyfatlegs‘Totallynormal.Keepinmindthatwe'retalkingaboutaninnocentlittlesqueezenotanurgetoactuallydoanyharm. ButwhydoesithappenOrianaAragonascientistsaysit'scommonforsomepeoplewhoexperienceastrongemotiontoimmediatelyexpresstheirfeelingsinawaythatseemstobeoppositetowhatthey'refeeling.Likecryingwhenyou'rehappyorlaughingwhenyou'resad.Thesamethingisgoingonwhenyouwanttosqueezethatbabyrabbit.Itservesanactualbiologicalfunction.Accordingtothestudyithelpsreestablishyourcmolionalequilibrium.Inotherwordsitkeepsyouremotions情感balanced. Alsoifyou'retakingcareofababyorbabyanimalyoursqueezingurgeactuallyhelpsyoubeabeltercaretaker.AragonsaysBecausetheymayhelppeopletoregaincontrolovertheirstrongemotionstheseexpressionshelpthecaretakertocareforananimalorbabyappropriately. 1WhatdoestheunderlinedwordpeculiarinParagraphIprobablymean A.Normal. B.Popular. C.Desperate. D.Strange. 2WhichcanbeclassifiedasaggressiveexpressionsintheYalestudy A.Topressababy'snosesoftly. B.Tomakeababylaugh. C.Tosqueezeababy'slegstopieces. D.Tobreakababy'sfingers. 3What'sthebiologicalfunctionofpeople'scryingwhentheyarehappy A.Tohidetheirtheirfeelings. B.Tobalancetheirstrongfeelings. C.Todrawothers'attention. D.Toexpresstheiractualsadness. 4WhatdoesAragonthinkofacaretaker'ssqueezingurge A.It'squitedangerous. B.Itshouldbecontrolled. C.It'sactuallybeneficial D.It'sthemostappropriate.
6分PreschoolChineseTeacherJuliaGabrielCentre&ChittemHouse •CandidatemustpossessatleastaBachelofsDegree; •Atleast2yearsoffull﹣timeworkingexperienceintherelatedfield; •RequiredSkills:ClassroommanagementEarlyYearsEducationArtandCraftMusicMicrosoftOfficeStorytellingDramaLessonPlanning; •AbletospeakclearstandardChinese; •AvailableinMarch2019 Website:http://www.juHagahnel.comTelephoneNo:03﹣20955500FulMimeChineseTeacherBrainyKidsLearningCentre •CandidatemustpossessatleastaPostGraduateDiploma; •Atleast3yearsoffull﹣timeworkingexperienceinChineseteaching; •TeacherCertificateisrequirediftheapplicant'sdegreeisnotinEducation; •rmemationalexperienceespeciallyinAsiaishighlyvalued; •Immediatetyavailable. Website:hup:www.hrainykids.comTelephoneNo:03﹣62768755PrimarySchoolChineseTcacherNilaiInternationalSchool •CandidatemusthaveatleastaPostGraduateDiploma; Acertificateineducationisrequired; •Atleast4years'fulMimeexperienceinteachingChinese; •Computerliteracyandexcellentcommunicaiionandinterpersonalskills; •Abletostartworkinmid﹣September2019. Website:http:www.nis.edu.myTelephoneNo:06﹣85002188PartTimeChineseTutorMindStretcherEducation •CandidatemustpossessatleastaBachelor'sDegree; •MuiUbeexpertinChineseduetoworknature; •Experienceinteachingwillhsvcanaddedadvantage; •RequiredSkills:ComputerSkillMicrosoftOffice; •AbletostartworkinJuly2019. Website:http://wwwjnse.edu.wtyTclcphoneNo:603﹣79876366 1WhichoffersuitsyouifyouarcnotavailableuntilAugust2019 A.Jul.aGabrielCentre&ChiltcmHouse. B.BrainyKidsLearningCentre C.NilaiIntentionalSchool. D.MindStretcherEducation. 2Whichpositionisopentofreshgrdduates A.ChineseTeacher. B.Full﹣timeChineseTeacher. C.SchoolChineseTeacher. D.PanTimeChineseTutor. 3What'sthesimilarrequirementofthefourpositions A.PostGraduateDiploma. B.AgoodcommandofChinese. C.Imemauonalexperience. D.Excellentcomputerskills.
下列说法中正确的是
小芳的妈妈买了一台洗衣机妈妈交给小芳一张洗衣机说明书如表所示和四个需要小芳解答的问题小芳的答案如下其中不正确的是
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小华家在农村还没用上天燃气使用的是瓶装液化气．如果每瓶中装入20kg液化气液化气的热值取4.2×107J/kg则每瓶液化气全部完全燃烧放出的热量是J若放出的热量有50%被利用在标准大气压下可把kg的水从20℃加热至沸腾c水＝4.2×103J/kg•℃．一次烧水过程中水烧开后她看到锅盖向上跳动其原因是水蒸气的能转化为锅盖的能．大气压为一标准大气压
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30分ImadeaspeechatEtonSchoollastyear.Whenthe1wasovertheheadmasteraskedmeifIwouldvisitan2student.Anillnesshadkepttheboyhomebuthehadexpressedaninterestin3meandtheheadmasterknewitwould4muchtohim.I5.Duringthenine﹣miledrivetohishomeI6somethingsaboutMatthewwhohadamuscledisease.Whenhewasbornthe7toldhisparentshewouldnotliveto5.Hewas13andfromwhatIwastolda8fighter.Hewantedtomeetme9Iwasagold﹣medalpowerlifterandIknewabout10difficultiesandgoingformydreams. Ispentoveranhour11withMatthew.Neveroncedidhecomplain抱怨oraskWhymeHespokeaboutwinningand12andgoingforhisdreams.13heknewwhathewastalkingabout.Hedidn't14thathisclassmateshadmadefunofhimbecausehewasdifferent;hejusttalkedabouthis15forthefutureandhowonedayhewantedto16weightswithme. WhenwefinishedtalkingIwentintomysuitcaseand17outthefirstgoldmedalIwonforpowerliftingandputitaroundhis18.Itoldhimhewasmoreofa19.HelookedatitforamomentandthenreturnedittomeandsaidRickyouareachampion.You20thatmedal.SomedaywhenIgettotheOlympicsandwinmygoldmedalIwillshowittoyou. 1A.program B.performance C.procedure D.story 2A.smart B.distinguished C.energetic D.special 3A.interviewing B.approaching C.greeting D.meeting 4A.reflect B.mean C.improve D.matter 5A.agreed B.understood C.smiled D.hesitated 6A.putaside B.foundout C.turnedto D.gaveaway 7A.officials B.teachers C.doctors D.colleagues 8A.real B.hard C.helpless D.serious 9A.after B.before C.unless D.because 10A.admitting B.avoiding C.overcoming D.recognizing 11A.declaring B.chatting C.predicting D.arguing 12A.seeking B.relaxing C.succeeding D.working 13A.Bravely B.Finally C.Disappointedly D.Obviously 14A.mention B.notice C.doubt D.realize 15A.methods B.lives C.hopes D.questions 16A.lose B.support C.bear D.lift 17A.carried B.pulled C.dragged D.kicked 18A.hand B.shoulder C.neck D.head 19A.winner B.helper C.reader D.survivor 20A.adopted B.earned C.designed D.used
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小明同学欲研究通过导体的电流跟导体电阻的关系图甲是他设计的实验电路．1在实验过程中他保持电源电压不变通过改变AB间R的电阻值测得相应的电流值如表1所示．小明分析表1中数据发现总结不出电流跟电阻的定量关系其原因是．表12小明认真反思自己的实验过程后找出了自己的错误所在并采取了正确的实验操作．你认为小明每次改变电阻后接下来的正确操作是．3正确操作实验后小明将得到的实验数据记录在表2中分析表2中的数据你能得出的结论是．表24同组的小丽同学将小明设计的电路进行了改进在AB间接入电阻箱来代替定值电阻．如图乙所示你认为这样做的好处是．
一只小鸟在平静的湖面上飞过当小鸟距水面4m时该倒影距小鸟m小鸟在湖面的倒影是填实或虚像它是由于光的形成的．
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8分Theregularworldpresentedtousbyourfivesenses﹣youcouldcallitreality1.0﹣isnotalwaysthemostuser﹣friendlyofplaces.Wegetlostinunfamiliarcities;wemeetpeoplewhoselanguagewedon'tunderstand.Sowhynottrytheimprovedversion:augmentedrealityARorreality2.0ARtechnologyaddscomputer﹣producedimages图象ontherealworldviaamobilephonecameraorspecialvideoglasses. EarlyformsofARarealreadyhere.WiththerightdownloadssmartphonescandeliverinformationaboutnearbyATMsandrestaurantsandotherpointsofinterest.Butthat'sjustthebeginning.Afewyearsfromnowthequantityofinformationavailablewillhaveincreasedhugely.Youwillnotonlyseethatthere'saChineserestaurantonthenextblockbutyouwillbeabletoseethemenuandreadreviewsofit. Thisiswherethenextrevolutionincomputingwilltakeplace:intheinterface界面betweentherealworldandtheinformationbroughttousviatheInternet.Imaginebubblesfloatingbeforeyoureyesfilledwithcoolinformationaboutanythingandeverythingthatyouseeinfrontofyou. Let'sjumpaheadtotenyearsfromnow.Apersontryingtofixtheircarwon'tbereadingabookwithpictures;theywillbewearingadevicethatprojectsanimated3﹣Dcomputergraphicsontotheequipmentunderrepairlabellingpartsandgivingstep﹣by﹣stepguidance. ThewindowontotheARworldcanbeasmartphoneorspecialvideoglasses.Butintenyears'timethesewillhavebeenreplacedbycontactlenses隐形眼镜withtinyLEDswhichpresentsomethingatareadabledistanceinfrontoftheeye.Soadeafpersonwearingtheselenseswillbeabletoseewhatpeoplearesaying. Thequestioniswhileweareallabsorbedinournewaugmentedrealityworldshowwillwebecommunicatingwitheachother 1Whatdoesthetextmainlytalkabout A.Thenextinformationtechnologyrevolution. B.Earlyformsofaugmentedrealitytechnology. C.Thedifferencesbetweenreality1.0andreality2.0. D.Therelationshipbetweenpeoplelivinginreality2.0. 2WhatdoestheunderlinedworditrefertoinParagraph2 A.Themenu. B.Theblock. C.Therevolution. D.Therestaurant. 3WhataretinyLEDsusedtodo A.Protectpeople'seyes. B.Showtextandimages. C.Warnusersofdangers. D.Replacevideoglasses. 4What'stheauthor'sattitudetowardsARtechnology A.Doubtful. B.Disapproving. C.Favourable. D.Ambiguous.
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