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a是自然数，它的倒数是． ．（判断题）
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一个自然数加上它的倒数后得到的仍然是一个自然数则原数是．
两个自然数的最小公倍数一定比这两个数都大．．判断题
自然数中除了质数就是合数．．判断题
自然数都有它的倒数．判断对错
5.29在自然数5和6之间它近似于5．．判断题
自然数都有它的倒数．判断对错
自然数一定是整数．判断题
一个不为0的自然数不是质数就是合数．判断题
0.5分自然数都有它的倒数．判断对错
小数都比自然数小．判断题
任意两个相邻的自然数0除外都是互质数．判断题
7.28在自然数7和8之间它约等于7．判断题
一个自然数越大它的因数的个数就越多．．判断题
含有因数2的自然数一定是合数．判断题
最小的自然数是1．．判断题
a是自然数它的倒数一定是．．判断对错
判断题0是自然数也是偶数
因为自然数的个数是无限的所以只有最小的自然数没有最大的自然数．．判断题
任何两个自然数的积都是合数．判断题
判断对错对的画√错的画×．1最大的自然数是1亿．判断题2自然数的个数是无限的．判断题3自然数计数单位
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Haveyoueverusedanylanguagelearningapps?Ifyouwanttolearnalanguageandspeakitrightawaymodernizeyourlearningstyleandadoptanapp.Itdoesn'tcostmuchbutit'sworthalot.1 ●Learnanywhereandanytime PersonallyIlovetoreviewmyvocabularyquietlyinmybedbeforesleepusingalanguagelearningapp.2Ofcourseit'salsopossibletolearnalanguagewithabookbutit'ssomuchmoreentertainingwhenyouareusingalanguagelearningapp! ●Neverwastetimeagain 3Moreoftenthannotwewillgetreallyannoyedorevenstressedwhentimeiswasted.Howeverwhenusingalanguagelearningapptimeseemstogobyquickly.Wecantaketheopportunitytoreviewandplayalittlewhilewehavetowaitaround. ●4 Haveyouevertakenupacourseatnight?IhavebutIfoundithardtocompleteitbecausethereweremanyrestrictions.Iwasrequiredtoattendclassestwiceaweekonafixedschedule.Butwhenwestudyonourownwithalanguagelearningappwecanstudyatourownpace. ●Saveyourmoney Mostlanguageschoolshaven'tevolvedtomeettheneedsofmodemsociety.Andthat'sbeforewe'veevenbeguntotalkaboutthepricewhichisoftenquiteunaffordable.5Butthebenefitsarehugeofferingyouthefreedomandindependencetolearnatverylittleexpense. A.Quickenyourprogress B.Workwithoutrestrictions C.Mobileappscanhandlecomplexapplications D.Learningwiththehelpofanappdoesn'tcostmuchatall E.WhenItravelIalsouseittolistentosomepodcasts播客 F.Weallhavetheexperienceofwaitingforanappointmentorabus G.Herearesomebenefitsoflanguagelearningappsusedonsmartphones
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WhenWarrenBuffettthemostsuccessfulinvestorwasaskedaboutthesecrettohiswealthandsuccessherevealedthathereadeveryday500pagestobeprecise.Unfortunatelyifyou'realreadyworking9‒5youmightnothavethetimetoreadatallletaloneanentirebookaday.Butwhatifyoucouldgetthebenefitsofreadingwithoutsacrificingallofyourfreetime?Youcan!WiththeBlinkistappyougetthekeylearninginminutesnothoursordays.Ourexpertstransformthesebooksintoquickeasy﹣to﹣understandinsights.Startwiththe5most﹣readbooks. 1.ThirteenThingsMentallyStrongPeopleDon'tDo byAmyMorin12minreadingtime147kreads Doyoustruggletogetoveryourfailures?Gettingoverthesecanhaveaprofoundinfluenceonyoureverydaylife.Morinshareshowhermostsuccessfulpatientsovercamethesedifficulties. 2.HowtoStopWorryingandStartLiving byDaleCarnegie19minreadingtime238kreads Everwonderedwhyyoucan'tstopworryingaboutsomething?Bydefiningthesourceofyourstressyoucangetoveritonceandforall.Carnegiecameupwithaformulathathelpsyouhandleanyoverthinkingsituation. 3.HowWillYouMeasureYourLife? byClaytonM.Christensen13minreadingtime137kreads Areyoumakingtherighttrade﹣offs权衡inlife?Whilecareerachievementscanbesatisfyingneglectingyourfamilyandfriendscanbebadinthelong﹣run﹣inwaysyoucan'tevenimagine. 4.FindingYourElement byKenRobinson13minreadingtime62.4kreads Everyonehasapassion.Ifyoudon'tknowwhatyoursisitjustmeansyouhaven'tdiscoveredityet.Findouthowyoucanbreakfreeofsociety'sstrictrulesandfindyourcallinginlife. 5.EmotionalIntelligence byDanielGoleman16minreadingtime318kreads Didyouknowifyourpulseraterisesabove100bpmyou'redeemedtooemotionaltothinkrationally?Youprobablyletfeelingscloudyourjudgmentmoreoftenthanyouknow.Golemanexplainshowyoucanavoidlettingyouremotionsruleyouandmakebetterdecisionsinlife. 1WhatkindofpeopledoestheBlinkistappbestsuit? A.Successfulinvestors. B.Richbusinessmen. C.Peoplewhohavelittletimeforreading. D.Studentswholovebooks. 2Whichbookhasbeenreadbythelargestnumberofpeople? A.HowtoStopWorryingandStartLiving. B.HowWillYouMeasureYourLife? C.FindingYourElement. D.EmotionalIntelligence. 3Whichbookoffersadvicetopeoplewhofeelstressed? A.ThirteenThingsMentallyStrongPeopleDon'tDo. B.HowtoStopWorryingandStartLiving. C.HowWillYouMeasureYourLife? D.FindingYourElement.
如图所示电源电压恒定R1R2为定值电阻R2＝20Ω灯泡L标有“6V3W”字样． 1当SS1S2都闭合时灯泡L正常发光电流表示数为A电路消耗的总功率为W 2当S闭合S1S2断开时电压表示数为2V则R1的阻值为Ω通电1minR1产生的热量为J．
如图所示电路电源电压恒为4.5V定值电阻R0的阻值为10Ω滑动变阻器的最大阻值为30Ω电阻箱Rx最大阻值为999.9Ω电流表量程为0～0.6A电压表量程为0～3V．闭合开关S下列说法正确的是
Chinahasbuiltahigh﹣speedpassengerrailnetworkinrecent1yearandwillcontinuetoexpandit.Bytheendof2018China'srailwaymileage里程2reach131000kilometersof329000kilometerswerehigh﹣speedrail.Thisaccountedfor2/3oftheworld'stotalhigh﹣speedrailtracksmakingChina'shigh﹣speedrailsystemtheworld's4largehigh﹣speedrailnetwork. China'shigh﹣speedtrainsaresimilar5thoseofFrance'sTGVGerman'sICEandJapan'sShinkansen.Thefasttrainswithatopspeedof250﹣350km/h6callCRHChinaRailwayHigh﹣speed. IfyouwanttotravelaroundChinathehigh﹣speedtrainswillbeyouridealchoicesincetheyarecleancomfortable7modem.UnlikeontheconventionaltrainsinChinanobodyisallowed8smokeonhigh﹣speedtrainsnotevenbetweencarriages. Theseatsareasgoodasthoseontheplaneorevenbetter.Mosthigh﹣speedrailticketshavecorresponding对应的seatsandonly9smallnumberofstandingticketsaresometimessoldonlimitedtrains.There'sneveracrowdofpeoplesittingintheaisles.TheticketpricesforChinahigh﹣speedtrainsarereasonableandonmostroutesthefrequencyofdepartureisveryhighsopeoplecanbuytickets10convenient.
DirectionsReadthefollowingpassage.Summarizethemainideaandthemainpointsofthepassageinnomorethan60words.Useyourownwordsasfaraspossible.Afteryouhavealongdayatschoolorworkgettingabitofshut﹣eyeonthewayhomeissometimesjustwhatthedoctorordered.Butsleepingtoolongandendingupwaypastyourdestinationisarealpossibility.AccordingtoresearchfromsleepspecialistsintheUSthereareseveralpossibleexplanationsforbeingabletonapduringatrainorbusrideandstillgetoffattherightstop.Onetheorystatesthatsomepeoplehaveestablishedsleeppatternthatallowthemtosleepandwakeupatpreciselythesametimeeachday.Thatmeanstheirbodyknowswhentowakeupandgetoffthetrain.Anothertheoryisthatpeoplearemorelikelytorecognizethenameoftheirstopsotheirbrainwakesthemupwhentheyhearitannounced.Alternativelythosewhocaneffectivelysleeponthetrainmightactuallybewakingupateverystopbutnotlongenoughtobecomeconsciousuntiltheyknowthey'rereachedtherightplace.Theseshortnapsmightworkforthosewhoarereallyexhaustedforevenabriefresthasthebenefitofreducingstressandhelpingyourelaxalittle.ButifyouaretravellingreallyfareachdaychancesarethatyouwillreachrapideyemovementREMsleepcycles.AccordingtoDr.MarcLeaveywhohasstudiedthisskill'You'remorelikelytobetriedordisorientedwhenyouwakeupfromthesedreamssoifyou'resleepingforlongerthan20minutesyoumayfindithardertowakeupoutofthisdreamstate.Ifyou'reinadeepREMsleepyou'remorelikelytomissyourstoporsleepthroughit.'Noteveryonecandoitbutsomepeoplecanruntheirsleepcyclelikeclockworkandtakeanaponpublictransportation.
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在综合实践活动中科技小组设计了一个由压敏电阻控制的报警电路如图所示电源电压恒为18V电阻箱最大阻值为999.9Ω．报警器电阻不计通过的电流达到或超过10mA会报警超过20mA会损坏．压敏电阻Rx在压力不超过800N的前提下其阻值随压力F的变化规律如下表所示． 1为不损坏元件报警电路允许消耗的最大功率是多少 2在压敏电阻Rx所受压力不超过800N的前提下报警电路所选滑动变阻器的最大阻值不得小于多少 3现要求压敏电阻受到的压力达到或超过200N时电路报警按照下列步骤调试此报警电路 ①电路接通前滑动变阻器滑片P置于b端根据实验要求应将电阻箱调到一定的阻值这一阻值为Ω ②将开关向端填数字闭合调节直至 ③保持将开关向另一端闭合报警电路即可正常使用． 4对3中已调试好的报警电路现要求压敏电阻受到的压力达到或超过700N时电路报警若电源电压可调其它条件不变则将电源电压调为V即可．
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两个相同的圆柱形容器中分别装有体积相等的甲乙两种液体图示是同一只鸡蛋在两种液体中静止时的情景．图中两种液体的密度分别为ρ甲和ρ乙鸡蛋所受浮力分别为F甲和F乙容器底部所受液体压强分别为p甲和p乙则它们的大小关系是ρ甲ρ乙 F甲F乙p甲p乙以下三种方案①在鸡蛋上开小孔用注射器抽取鸡蛋内蛋清再用胶带封好小孔②在鸡蛋上开小孔塞入大头针用胶带封好小孔③在容器中加入比原液体密度更大的液体若想使鸡蛋在乙液体中下沉可行的方案有填序号．
Nooneknowswhatthefuturewilllooklike.Newtechnologyandclimatechangemightmaketheworldmoredifferentthanwecanpossiblyimagine.Sowehadbetterkeepanopenmindandhopeforthebest. Wehavenoideawhatthejobmarketwilllooklikein2050.Itisgenerallyagreedthatmachinelearningandroboticswillchangealmosteverylineofwork﹣fromproducingyoghurttoteachingyoga.Howeverthereareconflictingviewsaboutthenatureofthechangeanditsurgency.Somebelievethatwithinameredecadeortwobillionsofpeoplewillbecomeeconomicallyredundant多余的.Othersmaintainthateveninthelongrunautomationwillkeepcreatingnewjobsandgreaterprosperityforall. Soareweonanedgeofaterrifyingsuddenchangeoraresuchforecastsyetanotherexampleofill﹣foundedLudditehysteria勒德分子的歇斯底里?Itishardtosay.Fearsthatautomationwillcreatemassiveunemploymentgobacktothenineteenthcenturyandsofartheyhavenevermaterialized.SincethebeginningoftheIndustrialRevolutionforeveryjoblosttoamachineatleastonenewjobwascreatedandtheaveragestandardoflivinghasincreaseddramatically. Yettherearegoodreasonstothinkthatthistimeitisdifferentandthatmachinelearningwillbearealgamechanger.Humanshavetwotypesofabilities﹣physicalandcognitive认知的.Inthepastmachinescompetedwithhumansmainlyinrawphysicalabilitieswhilehumansstillhadagreatadvantageovermachinesincognition.Henceasmanualjobsinagricultureandindustrywereautomatednewservicejobsemergedthatrequiredthekindofcognitiveskillsonlyhumanspossessedlearninganalysingcommunicatingandaboveallunderstandinghumanemotions.HoweverAIisnowbeginningtooutperformhumansinmoreandmoreoftheseskillsincludingintheunderstandingofhumanemotions. Wedon'tknowofanythirdfieldofactivity﹣beyondthephysicalandthecognitive﹣wherehumanswillalwaysmaintainasecureadvantage.ItiscrucialtorealizethattheAIrevolutionisnotjustaboutcomputersgettingfasterandsmarter.Itisfueledbybreakthroughsinthelifesciencesandthesocialsciencesaswell.Thebetterweunderstandthebiochemicalmechanismsthatsupporthumanemotionsdesiresandchoicesthebettercomputerscanbecomeinanalyzinghumanbehaviorpredictinghumandecisionsandreplacinghumandriversbankersandlawyers. Inthelastfewdecadesresearchinneuroscienceandbehaviouraleconomicsallowedscientiststogainamuchbetterunderstandingofhowhumansmakedecisions.Itturnedoutthatourchoicesofeverythingfromfoodtomatesresultnotfromsomemysteriousfreewillbutratherfrombillionsofneuronscalculatingprobabilitieswithinasplitsecond.Boasting‘humanintuition'直觉isactuallypatternrecognition. 1Thesecondparagraphtellsusabout. A.predictionsabouttheroleofmachinelearninginfuturejobmarket B.thespeedatwhichroboticswilltaketheplaceofhumanbeings C.theurgencyofcreatingnewjobswiththehelpofautomation D.thenatureofapplyingnewtechnologytoeverylineofwork 2Theunderlinedexpressionill﹣foundedinParagraph3isclosestinmeaningto. A.unidentified B.badly﹣managed C.unproven D.ill﹣intended 3WhichofthefollowingisTRUEaccordingtothepassage? A.Lackofjobsecuritymightforcepeopletopickupmachinelearning. B.ThereispossibilitythatAIcanperformaconsultingroleasapsychologist. C.Theuseofautomationwillmakehumansmoreneededthaneverbefore. D.Arealgamechangerlikesinmakingcomputersbecomefasterandsmarter. 4Whatcanbeconcludedfromthepassage? A.Atrevolutionissimilartotheindustrialrevolutionincausingunemployment. B.It'scrucialthathumansmaintainanadvantageinthethirdfieldofactivity. C.Theprocessofhumandecisioniscontrolledbyfreewillratherthanneurons. D.Thenatureofpreferenceatfirstsightistheresultofrecognizingpatterns.
TheLife﹣changingAntiqueNavajoBlanket ACaliforniamanandhisfamilywentfromragstorichesafterdiscoveringthattheblanketgiventohimbyhisgrandmotherwasworthasmallfortune.LorenKrylzerwaslivinginasmallhutandbarelygettingbyonhisdisabilitypayments.OnedayhehappenedtobewatchingAntiquesRoadshowonTVwhenhelearnedthattheforgottenoldblanketinhisclosetmightbevaluable.TheKrytzerfamilyheirloom传__turnedouttobeanantique古老的Novajoweavingfromthe19thcenturythatfetchedUS＄1.5millionatauction拍卖会. Krytzer'sblanketwasprizedformuchmorethanitsantiquity.AmongNativeAmericantribesTheNavajoarerecognizedasthemostskillfulweaversofblanketsandrugs.Theweavingstyleischaracterizedbyvividvariedpatternsandexceptionaldurability.Fromshearingthesheepspinningpreparinganddyeingthewooltotheactualweavingprocessittakesaround345hourstocreateoneblanket. WomentraditionallywoveNavajoblanketswhilemenbuilttheweavingdevices.TothisdayNavajopeoplestillmakehighqualityblanketsandrugstosell.TheybelievethatsinceonlyGodisperfecttheircreationsshouldhavesomeimperfection.AnotherNavajobeliefisthattheirsoulsaresewnintoeveryweavingsotheyintentionallyincludeahiddenloosethreadintoeachpiece.Thisensuresthatisisn'ttooperfectandtheirsoulscanstillescapeintotheafterlife. TheKrylzersalsohadaloosethreadontheirroadtorichesthatallowedthemtoescapethetrapoffinancialruin.Inanunfortunatetwistthefamily'slife﹣changingwindfall意外之财camewithahugetaxbillfromthegovernmentandalotofimploringrelatives.AftertakingafamilyvacationinMexicobuyinganewsportscarandacoupleofrealestatepurchasesKrytzerlosthisdisabilitypaymentsandnowgetbigbillsforpropertytaxesandinsuranceinstead.Ironicallythefamilydecidedtorelocatetoalessexpensivestatetosavemoney. 1HowdidtheKrytzerfamilygofromragetoriches? A.Afamilymemberpurchasedawinninglotteryticket. B.LorenwasinvitedtohaveaninterviewonaTVshow. C.Loren'sdisabilitypaymentswereunexpectedlyincreased. D.Lorenauctionedoffablankethisgrandmothergavehim. 2AloosethreadwoveninaNavajoblanketindicatesthat. A.God'screationisalsoimperfect B.peoplecanexitfromhorriblesituations C.itsownerissuretohaveaneverlastinglife D.theblanketisreallymadebyhand 3Whydidthefamilyfinallydecidetomovetoanotherstate? A.Toreducethecostofliving. B.Tobehiddenfromtheirrelatives. C.Tochangeforabetterenvironment. D.Toapplyfordisabilitypaymentsagain. 4AccordingtothearticlewhichofthefollowingstatementisTRUE? A.Navajoblanketshavenicepatternsbutdon'tlastlong. B.LorenKrytzermademillionsofdollarsfromdisability. C.Weavingablanketinvolvesmanyprocessesandskills. D.Loren'slifewentfrombadtoworsebecauseofthewindfall.
Markhavehurried.Afterdrivingattopspeed.hearrivedhalfanhourearly.A.needn't B.wouldn't C.mustn't D.couldn't
用橡皮做以下几个小实验． 1用刻度尺测量图中橡皮的长度为cm． 2手用力压住橡皮更易擦去写错的字应用的物理知识是越大越大． 3用细线吊住橡皮将一本物理课本放在课桌面上若发现现象则可以判断课桌面是水平的．
Theoddsarehighthatyou'veseenabeautypageant选美比赛ortwoinyourlife.Theyareamongthemostattendedandviewedeventsintheworld.Despitenumerousdifferentopinionsbeautypageantscontinuetonotonly1butalsobecomemorepopular. MissWorldMissUniverseMissInternationalandMissEarthareknownastheBigFourbeautypageantsandallofthemcontinuetothisday.Thesecompetitions2youngwomenontheirphysicalattractivenessofcoursebuttheyalsoarejudgedontheirpersonalityintelligencetalentandresponsestointerview﹣basedquestions.Theeventualwinnersreceiveprizesincludingcashscholarshipsclothesbeautyqueencrownsandofcoursethetitleoftheeventforoneyear. Alltheseawardsdonotcomecheapfortheyoungladies.Theyhavedutiestofulfillwhileholdingtheirtitles.Beautyqueensoftenappearatfunctionstoraisesocialawarenessaboutenvironmentalandsocialissuessuchasnature3racialorgenderdiscriminationanddiseaseprevention.Byprojectingtheimageofawell﹣educatedrespectablecharacter4withasuccessfulpersonalityeverybeautypageantwinnerisseenasarolemodelandnotjustforyounggirlsalone. Somebeautycontests5menratherthanwomen.SimilartotheirfemininecounterpartsmenenterMisterGlobalMisterInternationalandMisterWorldfortheirlooksstyleandtalent.Thesecontestsshouldnotbe6withtheMisterUniversecontestwhichisanannualbodybuildingcompetition. Thereareotherstrangeand7pageantsallovertheworldthatcelebrateeverythingfrombeingoldtobeingpregnant. Beautycontestswhetherorganizedwithnoble8orjustforfunhaveattractedcriticismsincetheywerefirstheld.Somecriticsobjecttothefocusonphysicalbeautyespeciallyemphasisonacertainstatureandbodyshape.Furthertheypointoutthatsomeparticipantswillactuallyhavethemselvesthroughdietingorplasticsurgerytoachievetheperfectappearance.Despitethesecomplaintsbeautymaybeonlyskindeepbut9itandcompetingforthegloryofbeingthefairestofthemallholdsatimelessanduniversal410
ForyearsdecadesinfactI'vepuzzledovertheresponsemostpeoplehavewhenItellthemImostlytravelalone. You'resobrave! WhyisitthatawomantravellingaloneasIhaveoftendoneformonthsatatimeisperceivedtobebravewhereasmenwhotravelaloneareentirelyunremarkable? Youareonlybravewhenyouareafraidofsomethingbutstilldoitanyway.Ihaveneverbeenafraidoftravellingalone. ThefirsttimeItravelledalonewaswhenIwas19.1wasduetotravelinEuropewithafriendattheendofthesummer.SheannouncedbylettertwodaysbeforeourdeparturethatshewouldbeleavingmehalfwayatVienna.ItwastoolatebythentoropeinanotherfriendsoitwaseithertogohomeafterViennaorkeepgoingbymyself.Ikeptgoing.Igotontrainsbymyselfcheckedintohostelsbymyselfandfoundmywayaroundbymyself.ItwasweirdatfirstbutlaterIstoppedworryingaboutit. WhenIgotbacktoIrelandafterthattripIfeltproudofmyself.IhaddonesomethingIhadassumedwouldbehardandithadturnedouttobenothardatall. ThatwasthreedecadesagoandsincethenIhavetravelledallovertheworldusuallyonmyown.IstilldowhatIdidthenwhichistokeepadiary.ThegreatestgiftofsolotravelhasbeenthoseI'vemetalongtheway.ImayhavesetoffaloneeachtimebutI'veencounteredmanypeoplewhobecameimportanttome.ImetmyhusbandinKathmanduNepal.ImetlifelongfriendsinAustraliaPolandHungaryTurkeyIndiaIndonesiaandmanyotherplaces. 1Whatmakestheauthorpuzzledwhenshetellspeopleofherexperience? A.People'sdisbelief. B.People'sresponse. C.People'sapproval. D.People'scriticism. 2Whatdoestheauthorsayaboutherfirsttimetotravelalone? A.Itwasatripbydesign. B.Shehadtochoosetogobyherself. C.Itwasharderthanexpected. D.Shesetoffallalone. 3Whatdotheunderlinedwordssolotravelinthelastparagraphmean? A.GroupTravel. B.Travellingwithfriends. C.Travellingalone. D.Travellingwithmusic. 4Howhastheauthorbenefitedfromhertravel? A.Shehasovercomeherfearoftravellingalone. B.Shehaswrittenacoupleofbooks. C.Shehasreceivedagreatmanygifts. D.Shehasmetmanypeoplealltheway.
NileCruiseinEgypt It'shardtobeatEgyptforitsmixofheatandcultureinDecember.Aseven—nightcruiseonboardatraditional19th—century—stylewoodenluxurysailingvesselwhichsleepsupto12andcruisesbetweenLuxorandAswancostsfrom£775perheadfullboarddepartingonDecember11throughBales08450570600www.balesworldwide.com. ChristmasMarketsinCologne PerhapsthebestofnorthernEurope'smanyChristmasmarketsisCologne—therearesevenseparatethemedmarketswhichstartopeningthisweek.Cologneisalsooneoftheeasiestplacestogettobytrain.EurostarconnectionsfromLondonviaBrusselstakejustunderfourhoursandreturnticketsareavailablethiswinterfrom£8908432186186www.eurostar.com.FordetailsofaccommodationandmarketsseeCologneTourismwww.cologne—tourism.com. SkiinginValThorens IfyouwanttobesureofsnowforskiingintheAlpsbeforeChristmasyouneedtoheadhigh—whereyouwillgettheadvantageofquietslopesandlowprices.Aweek'sstayatChaletElianecostsfrom£399chaletboardthroughCrystalSki08712312256www.crystalski.co.ukormuchmoreluxuriousaweek'shalfboardatthefive—starhotelcostsfrom£1195throughCrystalFinest08719710364www.crystalfinest.co.uk.BothpackagesarefordeparturesonDecember13. JapaneseOnsen SnowmonkeyswarmingthemselvesinthehotspringsatYudanakamakeanendearingsight.Assnowflakesfallyoumaybetemptedtoclimbinyourselfperhapsnotthesamepoolthough.ExperiencethisovernightatatempleandaryokanandseeTokyoandHiroshimatravelingbybullettrainonthe14—nightJapanUnmaskedtour£1600excludingflights01173144620www.insidejapantours.com. 1Theadvertisementismainlyaimedatthosewho. A.studyabroad B.oftentravelaround C.wanttogoshoppingbeforeChristmas D.arefondofskiinginwinter 2Marylovestheideaofshoppingduringhertrip.Shewillprobablycontactbycalling. A.08432186186 B.08450570600 C.08712312256 D.01173144620 3Ifyouwanttogosightseeingbywateryouhavetobook. A.beforeDecember11 B.beforeDecember13 C.beforeChristmas D.afterChristmas 4Ifyouenjoywatchinganimalsbathingwhichwebsitewillyouclickforfurtherinformation? A.www.crystalfinest.co.uk B.www.cologne—tourism.com C.www.insidejapantours.com D.www.balesworldwide.com 5Fromthepassagewecanlearnthat. A.skiinginValThorensishighinprice B.Eurostaristhemostbeautifulareaofthecity C.atouristhastowarmhimselfinthehotspringwithmonkeys D.aLondonerwillspendlessthan4hourstravellingtoColognebytrain
完成图中的光路．
作为一名成年人你一旦签下协议就应该承担履行承诺的责任.assume .
Oh!Theflowercan'tbesaved.Iftheflowerhadbeenwatereditnow.A.wouldn'tbedying B.isdead C.hadbeendead D.willnotdie
—Didyouforgetyourpromisedear? —Ihavefinishedmyhomeworkontimemom. A.Excuseme. B.Surely. C.Whynot? D.HowcouldI?
WalkOutoftheComfortZoneandTryNewThings Formosthighschoolstudentsfreeperiodsareuseless.FromwhatIhaveseenfewdohomeworkinsteadmanyareontheirphonesandtalkingmakingitimpossibleforthosewhoactuallywanttodoworktocompleteany.AsaseniornextyearIthinkextraperiodsshouldbeusedtotakeoptionalsubjects. Ourschooloffersmanyclasses.Nowisthetimetoexperimentindifferentfieldsofstudy.Wewillneverknowifweareinterestedortalentedinasubjectifwedon'ttryit. Inmy8thgradeIwastoldthatIhadtotakeanartclassasagraduationrequirementsointhe9thgradeItookStudioandArt.OneoftheprojectswastobuildaclaypotbutIbuiltmineincorrectlysoitbrokeinthekiln窑.IfoundoutthatIhavenoartisticabilityatallandnowIknowforsurethatIdonotwanttobeanartist.Howevertheclasswasoneofmyfavoritesthatyear.Iwasabletotrynewactivitiesandtestmyability. Walkoutofourcomfortzoneandtrynewthings!Collegeiswhenweshouldfocusonaspecificmajorbuthighschooliswhenwehavetofigureitout. Halfofallcollegestudentschangetheirmajoratsomepoint.Bydoingthathundredsofdollarsarewastedonclassesthattheywouldhaveneverneededtotake.Souseourextraperiodstofindoutwhatwewanttodoincollege.Theclasseswechoosecanimpactusinfuture.Takingoptionalsubjectswillenrichourmind.Itwillalsoshowcollegeswearediversestudents. 1Howshouldweuseourextraperiodsintheauthor'sopinion?nomorethan10words 2Whydoestheauthorthinkweshouldexperimentindifferentfieldsofstudy?nomorethan20words 3Whydidtheclaypotshowtheauthor'slackofartisticability?nomorethan10words 4Explaintheunderlinedsentence.nomorethan20wordsFreeperiodsshouldbeusedtolearnnewsubjectsthroughoptionalclassesinsteadoftalkingonphones. OrMakegooduseoffreeperiodsandtakeoptionalclassestolearnnewsubjects. 5Accordingtotheauthorhowwilltakingoptionalsubjectsimpactusinthefuture?nomorethan15words
Thesystemhasbeendesignedtogivestudentsquickandeasytothedigitalresources资源ofthelibrary.A.access B.passage C.way D.approach
如图为一辆正在匀速行驶喷射水雾的环保车它的动能选填“增大”“减小”或“不变”水雾喷出后一会儿就消失了其中发生的物态变化是此过程需要热．
inmylifeimpressedmesodeeplyasmyfirstvisittothePalaceMuseum.A.Anything B.Nothing C.Everything D.Something
WhenJohnwasgrowingupotherkidsfeltsorryforhim.Hisparentsalwayshadhimweedingthegardencarryingoutthegarbageanddeliveringnewspapers.ButwhenJohnreachedadulthoodhewasbetteroffthanhischildhoodplaymates.Hehadmorejobsatisfactionabettermarriageandwashealthier.Mostofallhewashappier.Farhappier. Thesearethefindingsofa40—yearstudythatfollowedthelivesof456teenageboysfromBoston.Thestudyshowedthatthosewhohadworkedasboysenjoyedhappierandmoreproductivelivesthanthosewhohadnot.Boyswhoworkedinthehomeorcommunitygainedcompetence能力andcametofeeltheywereworthwhilemembersofsocietysaidGeorgeVaillantthepsychologist心理学家whomadethediscovery.Andbecausetheyfeltgoodaboutthemselvesothersfeltgoodaboutthem. Vaillant'sstudyfollowedthesemalesingreatdetail.Interviewswererepeatedatages2531and47.UnderVaillanttheresearcherscomparedthemen'smental—healthscoreswiththeirboyhood—activityscoreswiththeirboyhood—activityscores.Pointswereawardedforpart—timejobshouseworkeffortinschoolandabilitytodealwithproblems. Thelinkbetweenwhatthemenhaddoneasboysandhowtheyturnedoutasadultswassurprisinglysharp.Thosewhohaddonethemostboyhoodactivitiesweretwiceaslikelytohavewarmrelationswithawidevarietyofpeoplefivetimesaslikelytobewellpaidand16timeslesslikelytohavebeenunemployed.TheresearchersalsofoundthatIQandfamilysocialandeconomicclassmadenorealdifferenceinhowtheboysturnedout.Working————atanyage————isimportant.Childhoodactivitieshelpachilddevelopresponsibilityindependenceconfidenceandcompetence———theunderpinnings基础ofemotionalhealth.Theyalsohelphimunderstandthatpeoplemustcooperateandworktowardcommongoals.Themostcompetentadultsarethosewhoknowhowtodothis.Yetworkisn'teverything.AsTolstoyoncesaidOnecanlivemagnificentlyinthisworldifoneknowshowtoworkandhowtolovetoworkforthepersononelovesandtoloveone'swork. 1WhatdoweknowaboutJohn? A.Heenjoyedhiscareerandmarriage. B.Hehadfewchildhoodplaymates. C.Hereceivedlittlelovefromhisfamily. D.Hewasenviedbyothersinhischildhood. 2Vaillant'swordsinParagraph2serveas. A.adescriptionofpersonalvaluesandsocialvalues B.ananalysisofhowworkwasrelatedtocompetence C.anexampleforparents'expectationsoftheirchildren D.anexplanationwhysomeboysgrewintohappymen 3Vaillant'steamobtainedtheirfindingsby. A.recordingtheboys'effortinschool B.evaluatingthemen'smentalhealth C.comparingdifferentsetsofscores D.measuringthemen'sproblemsolvingability 4WhatdoestheunderlinedwordsharpprobablymeaninParagraph4? A.Quicktoreact B.Havingathinedge C.Clearanddefinite D.suddenandrapid 5Whatcanbeinferredfromthelastparagraph? A.Competentadultsknowmoreaboutlovethanwork. B.Emotionalhealthisessentialtoawonderfuladultlife. C.Lovebringsmorejoytopeoplethanworkdoes. D.Independenceisthekeytoone'ssuccess.
根据小磁针静止时所指方向在图中画出通过小磁针中心的一条磁感线并标出电源的正极．
如图是水位自动报警器的原理示意图下图四个实验能反映其自动报警原理的是
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