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设椭圆为左右焦点，B为短轴端点，长轴长为4，焦距为2c，且b＞c，△BF1F2的面积为． （Ⅰ）求椭圆C的方程 （Ⅱ）设动直线l：y＝kx+m椭圆C有且仅有一个公共点M，且与直线x＝4相交于点N...
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若椭圆的焦距短轴长长轴长成等差数列则离心率为_________.
已知椭圆C.的短轴长为6离心率为则椭圆C.的焦点F.到长轴的一个端点的距离为
9
1
1或9
以上都不对
已知椭圆的中心为坐标原点O.椭圆短半轴长为1动点M2tt>0在直线x＝a为长半轴c为半焦距上.1求椭
若椭圆的短轴长为6焦点到长轴的一个端点的最近距离是1则椭圆的离心率为________
设椭圆的中心在原点对称轴为坐标轴且长轴长是短轴长的2倍.又点P41在椭圆上求该椭圆的方程.
若椭圆的对称轴为坐标轴长轴长与短轴长的和为18焦距为6求椭圆的方程．
点A.B.分别是以双曲线的焦点为顶点顶点为焦点的椭圆C.长轴的左右端点点F.是椭圆的右焦点点P.在椭
已知椭圆C.的中心为坐标原点O.一个长轴端点为02短轴端点和焦点所组成的四边形为正方形直线l与y轴交
椭圆的焦点在y轴上一个焦点到长轴的两端点的距离之比是1∶4短轴长为8求椭圆的标准方程
已知椭圆C.＋＝1a>b>0的两焦点与短轴的一个端点的连线构成等腰直角三角形直线x＋y＋1＝0与以椭
已知椭圆C的中心在原点焦点在x轴焦距为2且长轴长是短轴长的倍．椭圆C的标准方程为．
已知椭圆C的对称轴为坐标轴且短轴长为4离心率为.Ⅰ求椭圆C的方程Ⅱ设椭圆C的焦点在y轴上斜率为1的直
已知椭圆中心在原点一个焦点为F.－20且长轴长是短轴长的2倍则该椭圆的标准方程是.
设椭圆为左右焦点B为短轴端点长轴长为4焦距为2c且b＞c△BF1F2的面积为． Ⅰ求椭圆C的方程
设椭圆C1的离心率为焦点在x轴上且长轴长为26.若曲线C2上的点到椭圆C1的两个焦点的距离的差的绝对
设椭圆的长轴长短轴长焦距成等差数列则b值为
已知椭圆中心在原点一个焦点为F﹣20且长轴长是短轴长的2倍则该椭圆的标准方程是.
.若一个椭圆的长轴长短轴长焦距成等比数列则椭圆的离心率为________.
已知离心率为的椭圆的中心在原点焦点在x轴上.双曲线以椭圆的长轴为实轴短轴为虚轴且焦距为2.求椭圆及双
已知椭圆的中心为坐标原点O.椭圆短半轴长为1动点M.2tt＞0在直线x=a为长半轴c为半焦距上.1求
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15分Researchersexaminedthebenefitsofsingingamongpeoplewithmentalhealthconditions1includeanxietyanddepression. Theyfoundpeoplewhotookpartinacommunitysinginggroupimprovedtheirmentalhealthandthatthecombinationofsingingandsocialisingwasanimportantpartof2recover. Thegrassrootsactionrunsweeklysingingworkshopsforthepeople3mentalhealthconditionsaswellasthegeneralpublic.It4originalbeganatahospitalin20055afterwardsmovedintothecommunity.Around120peoplenowattendfourfreeworkshopseachweekacrossNorfolktwothirdsof6havehadcontactwithmentalhealthservices. Theresearchprojectfollowedthegroupforsixmonthsand7undertakeinterviewsandfocusgroupswithparticipantsorganisersandworkshop8leader. Thereportshowshowsingingandsocialisinggaveparticipants9feelingofbelongingandwellbeingthatoftenlastedadayor10manyaswellasimprovedsocialskillsandconfidence.
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8分Learninghowtofacesilenceinconversationisanimportantskillespeciallywhenworkingacrosscultures. Ininternationalnegotiationsexperiencednegotiator谈判者staysilentandimpassiveonpurposebecausethatwillmakeothersfeeluncomfortableandpossiblymakecompromiseswithouthavingtodoanything.Americansespeciallycan'tstandsilencesotheyoftenarethefirsttobreakthesilenceandsometimesmightbeatadisadvantageinnegotiations. Sowhat'sthebestresponse?Setyourjawandwaititout.Don'tofferacompromisejustbecausetheyarenotspeaking.IfyouhavetosaysomethingaskadirectquestionsuchasWhat'syourinitialreactiontothatoffer?Onceasilenceisgettinginto45secondsyoucouldsayLet'scomebacktothatinaminuteandgoonwiththenextpartofournegotiation. Inpresentationssilencecanbefarmoreeffectivethandramaticpassion热情.BeforestartinglookattheaudienceandbesilentforamomentbecausethatsaysI'mincontrol.IknowwhatI'mdoing.I'mconfident. AclassicexamplewaswhenAppleco﹣founderSteveJobslaunchedthefirstiPhone.Heintroducedwithmanypausessothatyoudidn'tmisshiskeypoints.Becausesilencemakesusnervousournaturalreactionisthatwe'dbetterpayattentionthere'ssomethinggoingonhere. Equallywhengivingaspeechtostaffortraineespausescount﹣especiallyiftherearenegatives.Ifyoukeeptalkingyou'respoonfeeding.Givepeopleamomentofsilencetogetbeyondtheemotionalresponseandtostartthinkingconsciouslyandprocessing. Silencecanbeaninward﹣focusedthoughtfulactivityoranoutwardstillnesswhereyougiveyourselfthetimetowatchandthinkandlistentotheworldaroundyou.HavingobservedtheuseofsilenceinFinlandandalsoamongtheBlackfeetNationaNorthAmericanIndiantribeinnorthernMontanaintheUSwecanseebenefitsfarbeyondwheelinganddealing. Silencecanbeaverypowerfulpointforunderstandingourselvesunderstandingothersfordevelopingbettercommonunderstandingandmoreproductiveoutcomesandthatappliestobusinesspoliticseducationlawmedicineeveryareaofhumanlife. 1WhatismostlikelytobeAmericansidea? A.Speakinglessgivestheupperhand. B.Theshortertalkinggapsarethebetter. C.Asilentmanisthebestonetolistento. D.Speakoutwhatyouhaveinyourmind. 2WhatisthepurposeoftheexampleofSteveJobs? A.ToshowthewisdomofSteveJobs. B.Toexplainsilencecanbemoreeffective. C.Tointroducehowtomakeapresentation. D.Toprovesilencecaneaseone'snervousness. 3WhatisthemeaningoftheunderlinedwordsspoonfeedinginParagraph6? A.Supportingsomepersonwithanyselflesshelp. B.Feedingsomebodypatientlywithasmallspoon. C.Givingotherssomenewideastothinkovercarefully. D.Usingawaythatdiscouragesindependentthought. 4Whatisthemainideaofthepassage? A.Silenceisthebestdefense. B.Silenceinnegotiationsisofgreathelp. C.Learningtheskillsaboutsilenceisimportant. D.Silencehasdifferentmeaningsindifficultculture.
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8分OnmyfirstdayofhighschoolgoingintomathclassIwaspointedandlaughedatbytwoofmyclassmates.Iinitiallythoughtmyflywasopenorthatsomethingwasstuckinmyteeth.ButasItookmyseatIheardonestudentwhisperWhyisablackboytakingHonors?Somyflywasn'topen.Anhonorslevelclasshadsimplybeentakenbyastudentwhoseskinwasbrown. Manypeoplethinkmyclothesshouldbebigenoughformetoliveinorexpectmetolistentoonlyblackmusic.Inseventhgradeagroupofmyclassmatesfixedtheircoldstaresonmyclothes.TheycalledouttomeGogetyourgangstaclothes.InoneofmySpanishclassestheteacheraskedmeDoyoulikerapmusicorrockmusicmore?IrepliedRock.Thelookofshockonmyclassmates'facesmademeuncomfortable. NowIstilltakeallHonorscourses.Istillwearclothesthatfitme.Mymusiclibrarycoversfromrocktopoptotechnoandalmosteverythinginbetween.WhenitcomestochoosingmyfriendsIamstillcolorblind.IcontinuetodomybesttoworkinschoolinordertoreachmygoalsandyetwhenIlookinthemirrorIstillseeskinofthatsamebrown. Ibelieveinbeingmyself.IbelievethatImyselfshoulddecidewhoIamandwhatactionsItakeinlife.Inhighschoolpopularityoftendependsonyourwillingnesstofollowtrends.AndI'vebeentoldthatitdoesn'tgetmucheasiergoingintoadulthood.Buttheonlyotheroptionistosacrificemypersonalityforthesatisfactionandapprovalofothers.ThiscanbeappealingbutI'mnotgoingtodothat. 1Whydidhisclassmateslaughathim? A.Hisflywasopen. B.Somethingwasstuckinhisteeth. C.Hewentintothewrongclassroom. D.Theyhadprejudiceagainsthim. 2Whatareblackpeopleusuallybelievedtodo? A.Listentorapmusic. B.Wearsmallclothes. C.TakeHonorscourses. D.AttendSpanishclasses. 3Whatdoestheunderlinedwordcolorblindprobablymean? A.Makingfriendsofthesameskincolor. B.Havingnoideawhatfriendstomake. C.Treatingpeopleequallyandfairly. D.Feelinghurtandoffendedinside. 4Whatcanbeasuitabletitleforthetext? A.FollowingPopularTrends B.BeingContentwithMyself C.HavingFaithinSkinColor D.ChangingMyPersonality
30分WhenFreddiearrivedtoperforminthehospitalroomPamworrieditwasalreadytoolate.Her88﹣year﹣oldstepfatherStrobelhad1beenmovedtothepalliative姑息治疗careunit.Pamcould2thatsomethinghadchangedinhim.AnursetoldherStrobel's3wasnear. You'reprobably4yourtimePamtoldFreddie.ButFreddie5withherwhatmedicalprofessionalshadtoldhim6maybethelastsensetogo. Letmegoinand7Freddiesaid.It'sasmuchforyouasitisforhim. Freddieisacountryandfolkmusician.Whenhewasinhischildhoodhismotherencouragedheryoungson's8talent.Whenshewasdyingofcancerheputtheir9ofsongstoitsgreatestuse.Hewouldcrawlintoherhospitalbedwithhisguitarand10herfavorites.Hismotherseemedtorelaxan11lookcrossingherface. Thatmomentallowedherandmeto12likeweusedtowhenIwassingingasakidFreddierecalled.Itemphasizedtohimthe13ofmusic.Whenhe14anon﹣profitorganizationcalledSwanSongswhicharrangedfreemusicallastwishesFreddiesignedupforthe15. ThatwasthecasewithPam'sstepfatherwhoenjoyed16musicandSwanSongssentFreddie.That'swhyFreddiearrivedatthehospitalthatdaywhenStrobelseemedreadytosay17Freddieplayedsomesongsandafter45minutesPamaskedforjustonemoresong.Freddie18LoveMe.HesangthelastnoteandStrobeltookhislastbreath. Ohmywejustexperiencedoneofthemost19momentsinourlives.Itwasagiftforusall.Atareallysadtimeitwas20saysPam. 1A.still B.just C.ever D.almost 2A.tell B.explain C.witness D.announce 3A.failure B.relief C.time D.recovery 4A.killing B.sparing C.spending D.wasting 5A.shared B.traded C.discussed D.exchanged 6A.Tasting B.Hearing C.Smelling D.Touching 7A.observe B.check C.negotiate D.play 8A.athletic B.creative C.musical D.literary 9A.love B.instruction C.choice D.assessment 10A.recite B.sing C.makeup D.pickup 11A.embarrassed B.regretful C.confused D.peaceful 12A.comfort B.pray C.connect D.escape 13A.power B.rhyme C.style D.sound 14A.setup B.brokeup C.heardabout D.talkedabout 15A.course B.program C.competition D.treatment 16A.modem B.popular C.classical D.country 17A.hello B.goodbye C.sorry D.no 18A.chose B.analyzed C.wrote D.enjoyed 19A.glorious B.difficult C.ridiculous D.magical 20A.delightful B.hopeful C.beautiful D.forgetful
ApplicationWorkshop JoinCitizensCommitteeforNewYorkCityandtheNYCDepartmentofSanitationforaworkshopontheGreenTeamMini﹣GrantapplicationonFebruary2whichlastsfrom400PMto530PM! Theworkshopwillcover •ApplyingfortheGreenTeamMini﹣Grant •HowtousetheZeroWasteschoolswebsite CreativeCoding WearehostingafreedesignworkshopjustforgirlsonMarch7from430PMto600PMinsupportofInternationalWomen'sDay!ThefocusoftheworkshopisonCreativeCodingwithartandtechnologybutwe'llalsohaveafewfemaledesignerstosharetheiruniqueworkwiththeattendees. Noexperiencenecessarythiseventisforgirlsbetweentheagesof9﹣12. SAT&ACTRoadmaptoSuccess Inthisfree1﹣hourworkshopparentswilldiscovertheroadmaptoSAT&ACTsuccess.TopicsincludedReviewofgoalscoresforSAT/ACTcollegeadmissionsnationaltrendsincollegeadmissionshowtodeterminewhethertheSATortheACTisthebesttestforyourstudentstepstopreparefortheSatorACTbesttimetotaketheSatorACT.JoinusonMarch23. SquareSchoolFamilyInformationNight JoinusforourFamilyInformationNightonMarch14!We'llgatheratthefuturehomeforSquareSchoolforanintroductiontotheschoolmodelat630pm. Thiseventisintendedforfamilieswithyoungpeopleenteringgradessixorsevenin2019thatwanttobeapartofaschoolcommunitythatattachesimportancetoalifestyleoflearning.JoinusforthisFamilyInformationNighttoseeifSquareSchoolistherightchoiceforyourfamily. 1Whichactivityoffersinformationabouttests? A.CreativeCoding B.SAT&ACTRoadmaptoSuccess C.PublicSchoolGreenTeamMini﹣Grant D.SquareSchoolFamilyInformationNight 2WhatisspecialaboutCreativeCoding? A.Itisafreeworkshop. B.IttakesplaceinMarch. C.Itishostedbyfemales. D.Itisdesignedforgirls. 3WhomightbeinterestedinFamilyInformationNight? A.Designers. B.Teachers. C.Parents. D.Students.
25分假定你是李华你的美国朋友Lily所在学校的汉语俱乐部要举办诵经典学汉语ReadClassics&learnChinese活动她给你发邮件征询建议.请你回复邮件内容包括 1.推荐诵读内容 2.推荐理由 3.活动建议. 注意 1.词数100左右 2.可以适当増加细节.以使行文连贯.
25分假设你是李华你校学生会计划组织一次讲座内容有关你校外教Smith在纽约孔子学院学习中国书法的经历.请你给Smith写封电子邮件内容包括 1.介绍活动内容和目的 2.告知时间地点讲座的时长听众的人数 3.提出邀请. 注意1.词数100左右 2.可适当增加细节和发挥使行文连贯. 参考词汇孔子学院ConfuciusInstitute中国书法Chinesecalligraphy
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. Theotherdaywemovedtothenewschoolyardwhereliesinthefarnorthofthecity.Wewereallonhighspirits.Itismuchbigthantheoldone.Theclassroomsarebrightandclean.Wehavealotofmodernequipmentmakingconvenientforstudentstolearneverysubject.Nowwecanhavealotofafter﹣classactivityonthenewplayground.Ourteachersoftenplaythebasketballandsoccertogetherwithus.Asspringapproachedtheflowersnewlyplantingintheyardhavejustcomeout.Withsuchmanygreentreesandfragrantflowersaroundwefeelitlesshardlytostudyandourschoollifemoreenjoyable.
15分ChineseresearchershaveplannedtobuildanairportinAntarcticainNovember.TheChinese1benotveryusedtoflyingtothesouthernmostcontinentbecausethecountrysfirstpolarplanetheSnowEagle6012putintouseonlythreeyearsago. BeforetheSnowEagle601Chineseresearcherstraveledtotheice﹣coveredlandbyshipwhichtooksignificantly3longthanflying.Therearecurrentlymorethan20airportsinAntarcticabutnoneofthembelongtoChina.TheSnowEagle601hastorelyonRussianairports4takeoffandland.That's5theChineseresearchersdecidedtobuildtheirown.BuildinganairportinAntarcticaisverydifferentfrombuildingoneelsewhere.Thecontinentiscoveredbya6constantmovinglayeroficesothebuildersmustfindsomewherethatmovesattheslowestpossiblepaceandina7fixdirection. Thebuildersmanagedtofindaspotbackinearly2017following8toughmeasuringprocessthattookplaceinthestorm﹣likepolarwinds.Thenextproblemisthesnow.Thesoftnatureofsnowmakes9abadmaterialforarunway.Sothebuildersmustuseroadroller﹣like10machinetopressthesnowwhichcanbeverytime﹣consuminginextremecoldness.
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小明携带质量为10kg的行李箱从太原到运城选择了尾气零排放的动车组D2503次列车出行．经查询D2503次列车时刻表如下．若该动车组列车全程匀速行驶在平直的轨道上牵引力恒为2.8×105N供电电路输入动车组列车的电功率恒为2×107W． 请你根据以上信息解决下列问题 问题一若小明的行李箱底部与列车行李架的接触面积约为0.2m2求此行李箱对水平行李架的压强．g取10N/kg 问题二求该动车组列车从太原南站到运城北站牵引力所做的功． 问题三求该动车组列车从太原南站到运城北站将电能转化为机械能的效率． 问题四若大型客运燃油汽车运行中做的功与该动车组列车从太原南站至运城北站牵引力所做的功相等求该燃油汽车排放气态污染物的质量．大型客运燃油汽车每做1焦耳的功排放气态污染物5×10﹣6g
12分UniversityofNewSouthWaleshaslauncheditsnew12﹣monthWomeninMaths&ScienceChampionsProgramdesignedtogivewomentheskillsandconfidencetobuildtheirpublicrecognitionandsetupaconnectednetworkofwomeninmathsandscience.Thefirstgroupof30femalePhDstudentsstartedinAugustthisyearandthesecondgroupof19early﹣careerresearcherswasformallyannouncedyesterday. Overthe12monthsthechampionscompleteatleast20hoursofrelatedactivitiesaspartofacommunityofrepresentativeswhowillinfluenceandinspirewomentopursueacareerinmathsandscience.Theactivitiesarevariedrangingfromvisitingschoolsandconductingsciencepresentationstoattendingconferencesandcreatingcontentforsocialmedia.AttheendoftheprogramPhDchampionshavethechancetoapplyeverythingthey'velearnedtothePostgraduateResearchCompetition.Aboveallparticipatingisarequirementforprogramcompletion. RoseO'DeaamemberofthefirstgroupisaPhDcandidateattheSchoolofBiologicalEarthandEnvironmentalSciences.ShesaidI'mexcitedabouttheopportunitytoworkwithschoolchildren.Ihopetoinspiresomegirlssotheyseenotallscientistsareoldermeninlabcoalsandthatscienceisquitediverseandmeansdifferentthingsdependingonwhoyouare. Dr.MarianaMayerPintoisanearly﹣careerresearcherattheSchoolofBiologicalEarthandEnvironmentalScienceswhereshemainlyworkswithmarine海洋的ecologists.SheisoriginallyfromBrazilandsaidthatbeingawomanfromadevelopingcountrymeantsheknewthestrugglesthatlackofrolemodelscancreate.Youcan'tbewhatyoucan'tsee!IalwayshavethehopethatIcanchangetheworldbitbybitandifonelittlegirlsaysshecanbecomeascientistbecauseItalkedtothemthat'dbeawesomeandthatwouldmakeeverythingworthit. 1Whatistheprogramintendedtodo? A.TestfemalePhD'slearningresults. B.Promotetheequalityofmenandwomen. C.Setupanorganizationforwomenscientists. D.Improvewomen'sparticipationinmathandscience. 2Whatisrequiredifaparticipantwanttocompletetheprogram? A.Topersuadeasleastonefemaletotakeupscience. B.Toparticipateinatleast20hoursofrelatedactivities. C.Toapplywhattheyhavelearnttotheirgraduationpaper. D.Toworkasarepresentativetogivepresentations. 3WhatdoesRoseO'Deathinkaboutscience? A.Varied. B.Inspiring. C.Unchangeable. D.Exciting. 4What'sthepurposeofthelastparagraph? A.Tosharehowfamilybackgroundmatters. B.Toshowtheoverallresultsofthisprogram. C.Toaddanexampleofhowaparticipantfeels. D.Totellofrolemodelstoencouragefemalestudents.
8分At930a.m.onaWednesdaymorningIreceivedanotification通知thatI'dalreadypickedupmyphone30timesthatday!11leftuntilyougooveryourgoalof41pickupsmyscreenread.Putyourphonedownuntil952a.m.!Enjoyyourtimelivinginthemoment. TheseupdatesweresentviaMomentanappthattracksmyscreentimecreatedbyKevinHoleshin2014tofighthisowndeviceaddiction.Hewasworkingasanindependentappdeveloperspendinghourseachdaystaringatscreens.AfterworkHoleshfoundthathewaslookingmindlesslyonlineinsteadoftalkingtohiswifeortakinghisdogsforawalk. IwantedawayofseeinghowmuchtimeIwassinkingintomyphonehesaid.SoIcameupwithsomethingthatcouldmonitormyscreentime.Holeshfoundthathewasspending75minutesonhisphoneaday.Headdedafunctiontotheappthatinformedhimwheneverhisscreentimewasmorethan40minutes.MyphonewouldmakeasoundlikeabeeandI'dgoanddosomethingelse.Itwaslikealittleangelonmyshoulderpushingmeintherightdirectionhesaid.HoleshfiguredthatifthesystemworkedforhimitwouldworkforothersandlaterthatyearhemadeMomentafreeapp.Todateithasbeendownloaded8milliontimes. BesideMomentalsohasacoachfunctionofferingguidedprogramstohelpusersfocusandbemoreproductivefor＄7.99amonth. IamsomuchhappierIsleepbetterIreadmoreItakebettercareofmyselfandmostofallIampresentinmyday﹣to﹣daylifeJackausersaid.SimilarcommentsonMomentreflectagrowingconsciousnessarounddigitalwellnessthenamegiventolifestylepracticesthatencouragehealthydeviceuse. 1WhatdoestheinspirationofMomentcomefrom? A.Thecreator'sownexperience. B.Thesoundmadebyhoneybees. C.Complaintsfromfamilymembers. D.Thewidespreaddigitaladdiction. 2WhatdoesMomentdoattheexpectedscreentime? A.Monitorthescreenandkeeparecord. B.Makeanoisetoremindtheuser. C.Turnoffthephoneimmediately. D.Forcetheusertotakearest. 3WhatdoestheauthorintendtodoinParagraph4? A.Persuadereaderstobuytheapp. B.Providereaderswithsomeadvice. C.Recommendacoachtothereaders. D.Introducemoreinformationoftheapp. 4Inwhichpartofawebsitewillyoufindthistext? A.FashionandBusiness. B.SportsandEntertainment. C.HealthandLifestyle. D.ArtandDesign.
如图所示OB是以O点为支点的杠杆F是作用在杠杆B端的力．图中线段AB与力F的作用线在一条直线上且OA⊥ABAC⊥OB．线段表示力F的力臂．选填“OA”或“AC”
“共享单车”低碳环保便于出行深受市民欢迎．假日期间小强和爸爸决定骑单车外出游玩取车时爸爸用手机摄像头扫描“共享单车”的二维码后自动开锁如图所示下列说法正确的是
拓展性学习小组的同学合作进行探究“串联电路的电压特点”设计了图Ⅰ电路并连接了图Ⅱ电路． 1图Ⅱ的实验电路连接中有一处错误无法完成试验连接错误的导线是填“a”“b”或“c”． 2正确连接后继续实验根据测得的实验数据绘制了如图Ⅲ所示的曲线图． ①图Ⅲ中甲乙两条曲线是根据图Ⅰ电路测得的实验数据所绘制的曲线其中与图Ⅰ电路中电压表V1对应的曲线是填“甲”或“乙”． ②已知电源电压恒为6V根据探究目的分析图Ⅲ中的曲线得出的实验结论是． 3拓展探究同学们根据串联电路的电压特点重新设计如图Ⅳ电路电源电压未知利用电压表和定值电阻R0已知阻值测量未知定值电阻Rx的阻值闭合开关S后接下来的操作是只需写出操作过程和测量的科学量不需写出表达式．
15分Everyonewhohaslivedorworkedoverseasunderstandsthattravelisanenrichingandlife﹣changingexperience1Thatfrustrationoftenstemsfromcultureshockbutbeingabletoidentifythesymptomscanhelpyoueasethediscomfortandanxietyoflivinginanewplace.Therearefourmainstagesofcultureshockwhilestudyingabroadthatoccuratdifferenttimesforeachperson. TheHoneymoonStage.Thisiswheneverythingisnewandfascinatingaboutyourhostcountry.It'satthisstagethatyoumayfallinlovewithItalianpizzaortheIrishaccent.2You'refascinatedbysimilaritiesanddifferencesbetweenthehostcountryandyourhome. TheCrisis危机Stage.Thisiswhenthedifferencesbetweenyourhomecultureandthehostcountrybecomeapparentandfeelingsoffrustration沮丧oranxietyoccurs.Youreallywantajellysandwichtoremindyouofhomebutyourealizeyourhostcountrydoesn'thaveitanywhere.Theydon'tknowyoursenseofhumor.3 4Atthisstageyoubecomefamiliarwithyoursurroundingsanddeveloparoutine.Thesameconcernswilloccurbutyouwillbebetterequippedtohandlethem.Youhavemorefriendsincreasedsocialskillsandyou'veevenbecomeanexploreroftheculture.You'veregainedyourconfidencebecomemoreindependentcompetentandculturallysensitive.TheMasteryStage.Congratulations!You'veadjustedtothehostculture.You'vetakenaninwardandoutwardjourneythathasledtoimmeasurablepersonalgrowth.You'renowabletoliveandworktoyourmaximumpotential. 5YoucanconfidentlyspeakandunderstandmostcolloquialEnglish.You'vedevelopedmeaningfulfriendships.You'vesettled.Youbelong. A.TheDepressionStage B.TheAdjustmentStage C.Nobodyknowstherealyou D.butitcanalsobefrustrating E.butitmaybecostlytoliveinanewculture F.You'renolongerdistressedbyculturaldifferences G.You'rethrilledbynewsightssoundssmellsandevents
青藏铁路部分路段的路基两旁各插有一排碗口粗细高约2m的铁棒我们叫它热棒．热棒在路基下还埋有5m深整个棒体是中空的里面灌有少量液氨．热棒的作用相当于天然的“制冷机”它是我们学过的物态变化知识的创造性应用．热棒的工作原理是当路基温度升高时液氨吸热发生上升到热棒的上端气态氨遇冷放热发生又沉入棒底．如此不断的循环有效的防止了路基温度的升高．填物态变化名称
8分AninternationalteamofresearchersfromtheUniversityofOxfordhavefoundthatthewaypeopleusetheInternetiscloselytiedtotheseasonalmovementsinthenaturalworld.Theironlinespeciessearchesfollowthepatternsofseasonalanimalmigrations迁徙. Migratorybirds候鸟floodbacktowheretheyreproduceeveryspring.Thatmigratorybehaviorisaccompaniedbysomehumanbehavior.InEnglish﹣languageWikipedia维基百科theonlinesearchesformigratoryspeciestendtoincreaseinspringwhenthosebirdsarriveintheUnitedStatessaidtheleadauthorJohnMittermeier. Andnotjustbirds.Mittermeierandhisteamsurveyednearly2.5billionWikipediasearchrecordsfor32000speciesacross245languages.Theyalsosawvariablesearchratesforinsectshorsetailsandfloweringplants.SeasonaltrendsseemedtobewidespreadinWikipediabehaviorformanyspeciesofplantsandanimals. Thisfindingsuggestsnewwaystomonitorchangesintheworld'sbiologicaldiversity.Italsoshowsnewwaystoseehowmuchpeoplecareaboutnatureandwhichspeciesandareasmightbethemosteffectivetargetsforconservation. Mittermeierisencouragedbythesearchresults.HecommentedIthinkthere'saconcernamongconservationists生态环境保护者thatpeoplearelosingtouchwiththenaturalworldandthatthey'renotinteractingwithnativespeciesanymore.Andsointhatsenseitwasreallyexcitingandquiteunexpectedformetoseepeople'sWikipediainterestcloselyrelatedtochangesinnature. RichardGrenyerAssociateProfessorfromtheUniversityofOxfordsayssearchdataisusefultoconservationbiologistsByusingthesebigdataapproacheswecandirectourattentiontowardsthedifficultquestionsinmodernconservationwhichspeciesandareasarechangingandwherearethepeoplewhocarethemostandcandothemosttohelp. 1Whathaveresearchersfoundaboutspeciessearches? A.Theystrengthentiesamongpeople. B.Theyaffecttheanimalmovements. C.Theydifferinlanguagebackgrounds. D.Theyreflectanimalmigrationseasons. 2WhatisthepurposeofwritingParagraph3? A.Tosummarizetheresearchprocess. B.Tofurthersupporttheresearchfindings. C.Toshowthevarietyofspeciessearches. D.Topresentresearchers'heavyworkload. 3HowdoesMittermeierfeelaboutthesearchresults? A.SatisfiedwithWikipedia'sservice. B.WorriedaboutWikipediabehavior. C.Amazedatpeople'scareaboutnature. D.Sadaboutpeople'snotgettingclosetonature. 4WhydoesRichardthinksuchsearchdataisuseful? A.Ithelpstoaimatconservationtargets. B.Itincreasesinterestinbigdataapproaches. C.Itkeepstrackoftrendsinbiologists'work. D.Itpushespeopletosolvedifficultproblems.
4月22日货运飞船“天舟一号”与空间站“天宫二号”成功对接．对接后以“天宫二号”为参照物“天舟一号”处于状态．由于外太空存在少量空气“天宫二号”运行时受到阻力机械能选填“变大”“变小”或“不变”．
如图所示密闭的玻璃罩内放有三个小实验装置一个是弹簧测力计测金属块重力一个是装满水的杯子杯口用塑料薄片覆盖并倒置悬挂在玻璃罩内另一个充气的气球．在用抽气机不断抽去罩内空气的过程中下列判断中不正确的是
8分Almostnoneofushavethetimetoreadeverythingwe'dliketoread.Yetwelosecountlesshourstodailyactivitiesthatbringuslittlejoyliketakingbusesandwaitinginline.Whatifwecouldturntheselittleblocksofunoccupiedtimeintopreciousandrewardingmomentsforlearningandreflection? Foundedin2012iReaderamicro﹣learningapponmobilephonesbringsthebiggestideasfrombest﹣sellingbooksthrough15﹣minuteaudio音频andtext.Sofarmorethan3000bookshavebeenincludedrangingfrompsychologyandparentingtomanagementandeconomicswithnewtitlesaddedeveryday. iReaderispioneeringanewmethodofreadingwithover9millionusersenjoyingthebenefitsalready.AccordingtothePewResearchCenterPRCtheBritishreadjust4paperbooksayearandover25%haven'treadasinglepaperbookthisyearbutreadingisn'tdying.TherearenowmorewaysfortheBritishtoreadthaneverbeforeduetothewidespreaduseofe﹣booksandaudiobooks. ThebooksiniReaderarerewrittentoensureitiseasytorememberthemaincontent.Thewaythecontentiseditedhasbeenspecificallydesignedtoensureitisusefulinpractice.Besidesthecontentisrewrittenwithrelevantexamplesinreallifewhichmeansusersaremorelikelytorememberandapplywhatishelpfultothem. HolgerSeimGermanco﹣founderofthisappdeclaresiReadergivesyouthebiggestideasintheshortestpossibletime.Ittransformsgreatideasintolittlepacksyoucanlistentoorreadinjust15minutes. 1Whatdoestheauthorsuggestpeopledointheunoccupiedtime? A.Readandthink. B.Writeandshare. C.Avoidtakingbuses. D.Bringjoytodailyroutines. 2WhatcanweinferfromthePRCfindings? A.TheBritishbenefitalotfromreading. B.Readingmethodsaremoreimportantthanbefore. C.Digitaltechnologyaretakingtheplaceofpaperbooks. D.NewformsofbooksarechangingthewaytheBritishread. 3HowdoesiReadermakethecontenteasytoremember? A.Bybringingfuntoit. B.Bymakingituseful. C.Byusingartisticdesigns. D.Bytakingusersasexamples. 4Whatisthebesttitleforthetext? A.iReaderPreventsReadingfromDying B.iReaderUnitesWorldwideBook﹣lovers C.iReaderTheBestNewAppCreation D.iReaderBigIdeasinSmallPackages
JustasJohnLubbocksaidwemaysitinalibraryandyetbeinallquartersoftheearth.Herearesomeofthecoolestlibrariesoftheworld. StuttgartCityLibrary Despiteaclassicwhite﹣on﹣whitecolorStuttgartCityLibraryisoneofthemostvisuallyappealingmodernlibraries.TheamazingmodemandsimplelookistheproductoftheKoreanarchitectYiEun﹣young.TheGermanlibraryopenedin2011andcostnearly80millioneurostoconstruct. KanazawaUmimiraiLibrary ArchitectsfromtheCoelacanthK&HArchitectsstudiodesignedtheKanazawaUmimiraiLibrarylocreatethebestreadingenvironment.Healedfloorsanoutpouringofnaturallightandotherfeatureswerespecificallyincludedloachievethisgoal.Thewallwhichconsistsofthousandsoftinyopeningsallowsnaturallightingintothebuildingimprovingtheoverallfeelofthespace.ThisJapaneselibrarywasopenedin2011andreflectstheappearanceofmanymodemandsimplespaces. LibraryofCongress In1800CongresssetuptheLibraryofCongressinWashingtonD.C..FifteenyearslaterThomasJeffersonofferedhispersonallibrarytoreplacebooksthatwerelostwhentheBritishsetthebuildingonfirein1814.Hisbookswhichtooknearly50yearstocollectvariedfromtextsonscienceliteratureandphilosophytobooksinavarietyofforeignlanguages.ThesedaystheLibraryofCongressoffersmorethan155millionitemsandthelargestrarebookcollectioninNorthAmerica. StateLibraryofVictoria TheSlateLibraryofVictorialocatedinMelbourneAustraliaisoneofthelargestexhibitinglibrariesintheworld.Thoughitopenedin1856majorrepairstookplacebetween1990and2004.TheLaTrobeReadingRoomisoneofthelibrary'smainattractionsduetoitsvisuallyamazingarchitecture.Thelawnatthelibrary'sfrontattractshundredsofcityfolkeachdaywhogatherforlunchortoenjoythestatuesthere.Thelibrarycurrentlycontainsovertwomillionbooksaswellasarmor盔甲ofNedKellyafolkheroagainsttherulingclass. 1Whichlibraryhasthelongesthistory? A.StuttgartCityLibrary. B.KanazawaUmimiraiLibrary. C.LibraryofCongress. D.StateLibraryofVictoria. 2What'sspecialaboutStaleLibraryofVictoria? A.Ithasgreatarchitecture. B.Ithasafolkhero'sstatueinit. C.Itistheworld'slargestexhibitinglibrary. D.Itservesasameetingplaceforthecitizens. 3Whatdoesthefirsttwolibrarieshaveincommon? A.Theyareconstructedinthemodernstyle. B.Theycostalargeamountofmoney. C.TheyaredesignedbyKoreanarchitects. D.Theyfeatureprovidingreaderswithnaturallight.
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. ThisafternoonIwenthomebybusasusual.IwaslisteningmusicwhenIsuddenlynoticedthebusstopthatIshouldgetoff.ThenIhurriedoffabus.ButwhenIarrivedhomeIfindthatmywalletwasgone﹣somemoneyandseveralimportantcardwereinit.EagertogetthewalletbacksoIrushedtothebuscompanyforhelp.LuckyattheLostandFoundofficeIsawmywallet.IfeltsoexcitingthatIwantedtothankthepersonwhohadturnedthemin.HoweverIwastoldthemanhadn'tlefthisname.Howagreatman!
30分Two﹣year﹣oldNancyisdeaf.Howeverthathasn'tstoppedherfrombeingan1littlegirltryingtochattoanyoneshemeets.Assoonasshegoesoutintotownwithherparentsshestarts2inthehopethatthepersonsheistalkingto3signlanguagetoo. Normallyhearinglossisasocial4forthosewhodon'tknowhowtousesignlanguage.AnyoneNancytriedtotalkto5thisandfeltsosorrytheycouldn't6.Theywishedtheycould7herandsaysomethingbackbuttheyfoundthemselvescompletely8. Thensomethingamazinghappened.Insteadofcausinga9thisbarrierbroughtthecommunity社区together.Determinedto10signlanguagesothattheycouldtalktoNancyher11hiredaninstructorontheirownandnowtheyare12totakingclassestogether.Theteacher13thatthisisreallyremarkablebecausequiteofteneventheparentsofdeafchildrendon't14tolearnthelanguage.ButhereNancyhasafullcommunitythatissigningandcommunicatingwithheranditisa15story. TheteacheralsosaysthatthislevelofinclusionwillmakeahugedifferenceinNancy's16.Italmostcertainlyguaranteesthatshewillbeahappierandmore17individualinthefuture.Nancy'sparentsarealreadynoticinga18intheirdaughterandtheyhavenowordstoexpresshow19theyaretotheirneighbors. Withalittlegirlandalotoflovetheneighbors20maketheneighborhoodacommunity. 1A.independent B.helpful C.outgoing D.generous 2A.signing B.cheering C.waving D.smiling 3A.accepts B.appreciates C.recognizes D.knows 4A.mistake B.barrier C.conflict D.stress 5A.discussed B.ignored C.realized D.denied 6A.respond B.apologize C.return D.agree 7A.inspire B.protect C.trust D.understand 8A.atrisk B.insurprise C.ataloss D.inahurry 9A.debate B.separation C.complaint D.panic 10A.create B.learn C.translate D.improve 11A.classmates B.parents C.teachers D.neighbors 12A.devoted B.opposed C.accustomed D.addicted 13A.warns B.predicts C.admits D.regrets 14A.fail B.bother C.hesitate D.refuse 15A.relaxing B.popular C.satisfying D.beautiful 16A.plan B.hearing C.life D.opinion 17A.well﹣adjusted B.mature C.well﹣behaved D.considerate 18A.potential B.belief C.strength D.difference 19A.friendly B.grateful C.important D.familiar 20A.truly B.almost C.merely D.even
如图所示的通电螺线管选填“左”或“右”端是N极．
星期天小方同学按照课后动手动脑学物理的操作要求验证了一个有趣的实验找一个圆柱形的玻璃瓶里面装满水．把一支普通铅笔放在玻璃瓶的一侧透过玻璃瓶可以看到那支笔如图所示．如果把笔由靠近玻璃瓶的位置向远处慢慢移动会看到什么现象小方记录了这个过程中所看到的现象其中有错误的是
10分Whetheryou'reflyingtoanislandparadiseortravelingforbusinessthesepackingtipswillhelpyouminimizetimeandmaximizespace. Startwiththeright﹣sizedsuitcase 1.Butifyoucan'ttravellightit'sbesttochooseabagthatcaneasilyaccommodateeverythingyouneed.Tryingtoforceafullsuitcasetoshutisawasteoftimeandenergyespeciallysinceyoumayreturnwithevenmorestuffifyouliketobuysouvenirs. Layeverythingoutbeforestarting Layeverythingyou'retakingoutonthebedsoyoucanseeexactlywhatyouneedtopackandspotanymissingitemspromptly.2.Forfoldeditemsputtinglayersoftissuebetweeneachitemwillcutdownonwrinkles. 3Beginbyputtingrolleditemsinalayeratthebottomofyoursuitcase.Cushionfragileitemslikeperfumebottlesinthemiddle.Plantoputitemsyouneedonarrivalatthetopendofthecase.4 Finishwithalargetoplayer Lastlylayalargeitemlikeatoweloverthetopsandtuckitinaroundthesides.5.It'smucheasiertoclosethezipperifyoudon'thaveitemslikebeltsorlaces. A.Packyoursuitcaseinlayers B.Thenfoldorrolleachitemofclothing C.Takeamomenttoassessyourneedsforthistrip D.Sothey'llbeeasytofindwhenyouneedthem E.Forashorttripasmallcarry﹣onbagisideal F.Geteverythingreadybeforeyoustarttheactualpacking G.Thiswillstopitemsfromslidingaroundduringthejourney
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