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如图甲所示，在光滑水平面上的两个小球1、2发生正碰，两小球的质量分别为m1和m2，图乙为它们碰撞前后的位移一时间图象（x﹣t图象）．己知m1＝0.1kg，由此可判断（ ）
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高三下学期物理《》真题及答案
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如图甲所示在光滑水平面上的两小球发生正碰小球的质量分别为m1和m2图乙为它们碰撞前后的s－t图象已知
小明为了探究动能的大小与哪些因索有关他设计了如图16甲乙丙所示的实验让质量相同的两个小球沿同一光滑斜
如图甲所示在光滑水平面上的两小球发生正碰小球的质量分别为m1和m2图乙为它们碰撞前后的s－t图象已知
碰前m
2
静止，m
1
向右运动
碰后m
2
和m
1
都向右运动
m
2
＝0.3kg
碰撞过程中系统损失了0.4J的机械能
质量为m的小球A.在光滑水平面上以速度与质量为2m的静止小球B.发生正碰后以的速率反弹试通过计算判断
六一儿童节那天两个小孩在光滑水平面上玩小球小球在水平面内的分速度vx和vy随时间变化的图线是如图ab
光滑的水平面上两个同一直线上相向运动的小球甲球的质量2kg乙球的质量1kg碰撞前后乙球的速度随时间变
0.5 m／s，向右
0.5 m／s，向左
1.5 m／s，向左
1.5 m／s，向右
如图5甲所示在光滑水平面上的两小球发生正碰小球的质量分别为m1和m2.图乙为它们碰撞前后的s－t位移
碰前m2静止，m1向右运动
碰后m2和m1都向右运动
m2＝0.3 kg
碰撞过程中系统损失了0.4J.的机械能
质量为6kg的小球A.在光滑水平面上以9m/s的速度向右运动质量为3kg的小球B.静止在水平面上小球
如图甲所示在光滑水平面上的两小球发生正碰.小球的质量分别为m1和m2.图乙为它们碰撞前后的s-t位移
碰前m
2
静止，m
1
向右运动
碰后m
2
和m
1
都向右运动
m
2
=0.3kg
碰撞过程中系统损失了0.4J的机械能
质量为m的小球A.在光滑水平面上以速度v0与质量为2m的静止小球B.发生正碰后以v0的速率反弹试通过
一质量为0.5kg的小球以2m/s的速度和原来静止在光滑水平面上的质量为1kg的另一小球发生正碰碰后
一质量为0.5kg的小球以2.0m/s的速度和原来静止在光滑水平面上的质量为1.0kg的另一小球发生
如图所示在光滑水平桌面上有两个小球质量为m1的小球以速度v与质量为m2静止的小球发生正碰两球碰撞后粘
小明为了探究动能的大小与哪些因素有关他设计了如图甲乙所示的实验1让质量相同的两个小球沿同一光滑斜面分
如图所示在光滑水平面上用两根劲度系数分别为k1k2的轻弹簧系住一个质量为m的小球开始时两弹簧均处于原
如图所示平放在水平面上的轻质弹簧的一端固定在竖直墙上质量为m1的光滑弧形槽静止在光滑水平面上底部与水
如图甲所示在光滑水平面上的两小球发生正碰.小球的质量分别为m1和m2.图乙为它们碰撞前后的s﹣t位移
碰前m
2
静止，m
1
向右运动
碰后m
2
和m
1
都向右运动
m
2
=0.3kg
碰撞过程中系统损失了0.4J的机械能
质量为m的小球A.以水平速度v与原来静止在光滑水平面上的质量为3cm的小球B.发生正碰已知碰撞过程中
用长短不同材料相同的同样粗细的绳子各拴着一个质量相同的小球在光滑水平面上做匀速圆周运动如图所示则
两个小球以相同的线速度运动时，长绳易断
两个小球以相同的角速度运动时，短绳易断
两个小球以相同的角速度运动时，长绳易断
以上说法都不对
在光滑水平面上有两个相同的弹性小球AB质量都为m．现B球静止A球向B球运动发生正碰．碰后两球以共同的
1：1
1：2
2：1
1：4
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8分Duringtherosyyearsofelementaryschool小学Ienjoyedsharingmydollsandjokeswhichallowedmetokeepmyhighsocialstatus.Iwasthequeenoftheplayground.Thencamemytweensandteensandmeangirlsandcoolkids.TheyroseintheranksnotbybeingfriendlybutbysmokingcigarettesbreakingrulesandplayingjokesonothersamongwhomIsoonfoundmyself. Popularityisawell﹣exploredsubjectinsocialpsychology.MitchPrinsteinaprofessorofclinicalpsychologysortsthepopularintotwocategoriesthelikableandthestatusseekers.Thelikables'plays﹣well﹣with﹣othersqualitiesstrengthenschoolyardfriendshipsjump﹣startinterpersonalskillsandwhentappedearlyareemployedeverafterinlifeandwork.Thenthere'sthekindofpopularitythatappearsinadolescencestatusbornofpowerandevendishonorablebehavior. EnviableasthecoolkidsmayhaveseemedDr.Prinstein'sstudiesshowunpleasantconsequences.Thosewhowerehighestinstatusinhighschoolaswellasthoseleastlikedinelementaryschoolaremostlikelytoengage从事indangerousandriskybehavior. InonestudyDr.Prinsteinexaminedthetwotypesofpopularityin235adolescentsscoringtheleastlikedthemostlikedandthehighestinstatusbasedonstudentsurveys调查研究.Wefoundthattheleastwell﹣likedteenshadbecomemoreaggressiveovertimetowardtheirclassmates.Butsohadthosewhowerehighinstatus.Itclearlyshowedthatwhilelikabilitycanleadtohealthyadjustmenthighstatushasjusttheoppositeeffectonus. Dr.Prinsteinhasalsofoundthatthequalitiesthatmadetheneighborswantyouonaplaydate﹣sharingkindnessopenness﹣carryovertolateryearsandmakeyoubetterabletorelateandconnectwithothers. InanalyzinghisandotherresearchDr.PrinsteincametoanotherconclusionNotonlyislikabilityrelatedtopositivelifeoutcomesbutitisalsoresponsibleforthoseoutcomestoo.Beinglikedcreatesopportunitiesforlearningandfornewkindsoflifeexperiencesthathelpsomebodygainanadvantagehesaid. 1Whatsortofgirlwastheauthorinherearlyyearsofelementaryschool? A.Unkind. B.Lonely. C.Generous. D.Cool. 2Whatisthesecondparagraphmainlyabout? A.Theclassificationofthepopular. B.Thecharacteristicsofadolescents. C.Theimportanceofinterpersonalskills. D.Thecausesofdishonorablebehavior. 3WhatdidDr.Prinstein'sstudyfindaboutthemostlikedkids? A.Theyappearedtobeaggressive. B.Theytendedtobemoreadaptable. C.Theyenjoyedthehigheststatus. D.Theyperformedwellacademically. 4Whatisthebesttitleforthetext? A.BeNice﹣YouWon'tFinishLast B.TheHighertheStatustheBetter C.BetheBest﹣YouCanMakeIt D.MoreSelf﹣ControlLessAggressiveness
如图ABC为固定在竖直平面内的轨道AB段为长0.75m的粗糙水平杆BC段为半径R＝2.5m圆心角θ＝10°的光滑圆弧AB相切于BC．穿在轨道上的小球在A处时速度水平向左大小为1.0m/s已知小球与AB之间的动摩擦因数μ＝0.05求g取10m/s2 1小球向左经过B点时的速度大小 2小球在圆弧上达到的最大高度 3小球从最大高度起需多长时间再次经过B点．
如图所示为一正点电荷周围的电场线电场中有AB两点AB两点在同一条电场线上则
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声波能绕过建筑物传播而光波却不能是因为
30分Everyyearabout40000peopleattempttoclimbKilimanjarothehighestmountaininAfrica.They1withthemlotsofwaste.The2mightdamagethebeautyoftheplace.Theglaciers冰川aredisappearingchangingthe3ofKilimanjaro. HearingthesestoriesI'm4abouttheplace﹣otherdestinationsaredescribedaspurernaturalexperiences. HoweverIsoon5thatmuchhaschangedsincethedaysofdisturbingreportsof6amongtonsofrubbish.Ifinda7mountainwithtoiletsatcampsandalongthepaths.Theenvironmentalchallengesare8buttheeffortsmadebytheTanzaniaNationalParkAuthorityseemtobe9. ThebestofaKilimanjaro10inmyopinionisn'treachingthetop.Mountainsare11asspiritualplacesbymanycultures.This12isespeciallyevidentonKilimanjaroas13gothroughfiveecosystems生态系统inthespaceofafewkilometers.Atthebaseisarainforest.Itendsabruptlyat3000meters14landsoflowgrowingplants.Furtheruptheweather15﹣lowcloudsenvelopethemountainsideswhicharecoveredwiththickgrass.I16twelveshadesofgreenfromwhereIstand.Above4000metersisthehighland17gravel砾石stonesandrocks.18youclimbintoanarctic﹣likezonewith19snowandtheglaciersthatmaysoondisappear. DoesKilimanjaro20itsreputationasacrowdedmountainwithlinesoftouristsruiningtheatmosphereofpeace?Ifoundtheoppositetobetrue. 1A.keep B.mix C.connect D.bring 2A.stories B.buildings C.crowds D.reporters 3A.position B.age C.face D.name 4A.silent B.skeptical C.serious D.crazy 5A.discover B.argue C.decide D.advocate 6A.equipment B.grass C.camps D.stones 7A.remote B.quiet C.all D.clean 8A.new B.special C.significant D.necessary 9A.payingoff B.spreadingout C.blowingup D.fadingaway 10A.atmosphere B.experience C.experiment D.sight 11A.studied B.observed C.explored D.regarded 12A.view B.quality C.reason D.purpose 13A.scientists B.climbers C.locals D.officials 14A.holdingonto B.goingbackto C.livingupto D.givingwayto 15A.changes B.clears C.improves D.permits 16A.match B.imagine C.count D.add 17A.village B.desert C.road D.lake 18A.Obviously B.Easily C.Consequently D.Finally 19A.permanent B.little C.fresh D.artificial 20A.enjoy B.deserve C.save D.acquire
Notsurewhatgifttogetyourlovedones?Thinktechnology!Youmayevenfindsomethingspecialforyourself! MiniQuadcopter Wouldyouliketohaveaflyingtoybutlackspacetoflyone?ConsideraMiniQuadcopterthatissmallenoughtofitinsideyourhand.ThisMiniQuadcoptercanbecontrolledtoflyinanydirectionwithitsremotecontrol.TheMiniQuadcopterisavailablefromHammacherSchlemmerfor﹩39.95. SelfieToaster Doesyoursweetieliketakingselfiesandeatingtoast?WellwhynotcombinethetwowiththeSelfieToaster?TheSelfieToastercratesanimageonthepieceoftoastsoyoucansmileatyourselfeverymorning.TheSelfieToasterisavailablefromEtsyfor﹩10.95. AmazonEcho GivetheknowledgeoftheworldwiththeAmazonEcho. Theadvicecananswerquestionstellyouaboutweatherconditionstelljokesplaymusicandmore.TheEchoalsoactsasaBluetoothspeakersoyoucanconnectyourphoneandlistentoyourfavoritesongs.TheEchoisavailablefromAmazonfor﹩179. IndoorSnowfallLight GetintothespiritoftheholidayseasoninyourhomewiththeIndoorSnowfallLight.Thelightshowssnowflakeshapesinyourroomtogiveyouthefeelingofawintersnowfall.Youcancontrolthespeedofthesnowfallunliketherealwhether.TheIndoorSnowfallLightisavailablefromSharperImagefor﹩59.99. 1WhomaybemostinterestedinaMiniQuadcopter? A.Drivers. B.Children. C.Teachers. D.Housewives. 2What'sthefunctionofaSelfieToaster? A.Itkeepsyourfoodfresh. B.Ithelpsorderyourfood. C.Itmakesyourpictureprettier. D.Itputsyourimageonyourfood. 3YouwillneedanAmazonEchowhenyouare. A.atameeting B.intheclassroom C.onalongtrip D.havinganinterview 4WhichwebsiteisprobablyvisitedmostatChristmas? A.Etsy. B.Amazon. C.SharperImage. D.HammacherSchlemmer.
30分Paullookedoutofthewindowoftheclassroomandsighed.Thedrivewaywasstill1anditwasgettingdark.Hisdadhadsaidthathewould2himupby530butitwasalmostsevenandPaulhadn'theardawordfromhim.Paul3todosomeofhisreadinghomework.4hecouldn'thelpthinkingofhisdad.Heknewthathisdadhada5andalifebuthecouldn't6whyhewasalwaysbreakinghis7. ThenextdayatschoolPauldidn't8hismathhomework.Paul'steachernoticedhisunusually9performanceandaskedhimwhy.Pauldidn'twantto10him.Heknewthatifhestartedtalkingafloodof11wouldpourout.Hejustwantedtobealonewithhis12sohesatthere13notevenlookingattheteacher.WellPaulyoucan'thavethisthing14youup.Thesooneryougetitoffyour15thesooneryoucanheal. AsPaulwalkedhomefromschoolhe16thethingstheteacherhadtoldhim.Paulknewthathehadn't17himselfrecently.Maybehestoppeddoinghisworkbecausehewaslookingfor18fromhisfather.Herealizedthathewasn'tjustlettinghisdad19hisplansbuthewaslettinghimspoilhis20.Hedecidedtotaketheteacher'sadvice. 1A.dusty B.noisy C.empty D.leafy 2A.lift B.pick C.call D.put 3A.tried B.seemed C.preferred D.pretended 4A.Undoubtedly B.Honestly C.Thus D.However 5A.job B.problem C.qualification D.document 6A.believe B.analyse C.confirm D.understand 7A.records B.barriers C.promises D.habits 8A.turnover B.turnin C.complete D.do 9A.poor B.superior C.memorable D.strong 10A.disturb B.interrupt C.tell D.track 11A.homework B.revision C.enquiries D.emotions 12A.study B.pain C.responsibility D.sympathy 13A.quietly B.tentatively C.voluntarily D.unconditionally 14A.eat B.wake C.cheer D.ring 15A.routine B.plan C.chest D.curriculum 16A.gaveup B.reflectedon C.heardof D.dreamedabout 17A.persuaded B.encouraged C.defended D.been 18A.freedom B.expectation C.guidance D.attention 19A.abandon B.ruin C.oppose D.postpone 20A.privilege B.reputation C.life D.vacation
电子的发现说明是可分的卢瑟福通过α粒子散射实验提出了模型．
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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. Ibecameinterestinginplayingfootballthankstoasmallaccident.OneafternoonwhereIwasinprimaryschoolIwaswalkingbytheschoolplayground.Suddenlyfootballfelljustinfrontofmebutalmosthitme.Istoppedtheballandkickedithardlybacktotheplayground.Toeveryone′ssurprisingtheballwentintothenet.AllthefootballplayerontheplaygroundcheeredloudlysaythatIhadatalentforfootball.FromnowonIstartedtoplaymyfootballwithclassmatesafterschool.Iamagoodplayernow.
8分ForCanaanElementary'ssecondgradeinPatchogueN.Y.todayisspeechdayandrightnowit'sChrisPalaez'sturn.The8﹣year﹣oldisthejokeroftheclass.Withshiningdarkeyesheseemslikethekindofkidwhowouldenjoypublicspeaking. Buthe'snervous.I'mheretotellyoutodaywhyyoushould…should…Christripsonthe﹣ldapronunciationdifficultyformanynon﹣nativeEnglishspeakers.HisteacherThomasWhaleyisnexttohimwhisperingsupport.…Votefor…me…ExceptforsomestumblesChrisisdoingamazinglywell.WhenhebringshisspeechtoaniceconclusionWhaleyinvitestherestoftheclasstopraisehim. AsonofimmigrantsChrisstartedlearningEnglishalittleoverthreeyearsago.Whaleyrecalls回想起howatthebeginningoftheyearwhencalledupontoreadChriswouldexcusehimselftogotothebathroom. LearningEnglishasasecondlanguagecanbeapainfulexperience.Whatyouneedisagreatteacherwholetsyoumakemistakes.IttakesalotforanystudentWhaleyexplainsespeciallyforastudentwhoislearningEnglishastheirnewlanguagetofeelconfidentenoughtosay‘Idon'tknowbutIwanttoknow.' Whaleygottheideaofthissecond﹣gradepresidentialcampaignprojectwhenheaskedthechildrenonedaytoraisetheirhandsiftheythoughttheycouldneverbeapresident.Theanswerbrokehisheart.Whaleysaystheprojectisaboutmorethanjustlearningtoreadandspeakinpublic.Hewantsthesekidstolearntoboast夸耀aboutthemselves. BoastingaboutyourselfandyourbestqualitiesWhaleysaysisverydifficultforachildwhocameintotheclassroomnotfeelingconfident. 1WhatmadeChrisnervous? A.Tellingastory. B.Makingaspeech. C.Takingatest. D.Answeringaquestion. 2Whatdoestheunderlinedwordstumblesinparagraph2referto? A.Improperpauses. B.Badmanners. C.Spellingmistakes. D.Sillyjokes. 3WecaninferthatthepurposeofWhaley'sprojectisto. A.helpstudentsseetheirownstrengths B.assessstudents'publicspeakingskills C.preparestudentsfortheirfuturejobs D.inspirestudents'loveforpolitics 4WhichofthefollowingbestdescribesWhaleyasateacher? A.Humorous. B.Ambitious. C.Caring. D.Demanding.
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25分假定你是李华美国朋友David来信说他对中国的丝绸文化以及一带一路倡议很感兴趣请给他回信要点如下 1丝绸始于新石器时代 2原料为蚕茧兼具高雅与环保 3古丝绸之路对世界文化交流的作用 4一带一路倡议将产生的深远影响. 注意1.词数100左右 2.可适当增加细节以使行文连贯. 参考词汇一带一路倡议theBeltandRoadInitiative 新石器时代NeolithicAge蚕茧cocoon
25分假定你是李华你的美国朋友John对茶感兴趣.请你结合下面图示用英语给他写一封邮件诚邀他参加即将在宁波举办的茶文化节并简要介绍茶文化节活动及我国茶的历史茶的益处等. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯.
10分Ifyou'regoingabroadforcollegeyoumightbethinkingabouthowtogetyourselfasafeandcozyhomefortheyearsahead.Ofcoursedormitoriesarealwaysagoodplacetostart.butsomelargestatecollegesrequirejuniorstoliveoffcampusduetothelimitednumberofdormrooms.1. Howtofindahouse2.Ifyouarejustafreshmanordon'tknowmanypeopledon'thesitatetoapproachsomeupperclassmeninyourclassesorclubs.Moreoftenthannotupperclassmenhavemoreexperiencewithrentingandaremorefamiliarwiththeareayourschoolisin. Anothergoodideaistotalktoseniorswhoarecurrentlylivingoff﹣campus.Theseseniors'landlordswillmostlikelybelookingfornewtenants房客aftergraduation. Alsoregisteredrealtors房地产经纪人mightbeabletofindyouaplaceforafee.InadditionFacebookgroupscanalsoprovidesomeusefulinformation.3. Roommates Havingroommatescannotonlysaveussomemoneybutalsogiveusvaluablecom﹣panionship.Howeverrememberthatfindingtherightroommatesforyouisthemostimportantthingotherthansafetyconcerns.4definitelydonotlieaboutyourpreferencesscheduleorhabitseveniftalkingaboutthemcouldmakeyouuncomfortable.Ontheothersidealsoremembertoaskyourpotentialroommatestotellyouaboutthemselvesindetail. 5pleasedoeverybodyafavorbybeingupfrontaboutit.Constantlyrunninginto conflictswithyourquietroommateisdefinitelythelastthingyouwant. A.Ifyouareapartyanimal B.Whilelookingforroommates C.Getalongwellwithyourroommates D.Whenhavingachatwithyourroommate E.Firstyoucanaskyourfriendswhoarealreadylivingoffcampus F.Howeverbereallycarefulifyougetintouchwithstrangersthroughtheinternet G.Nonethelessrentinganapartmentcangiveyousomehands﹣onexperiencewithliving
VisitorsstillstopattheoldhouseinScituateMassachusetts.Butthehouseisnotwhatbringsthemthere.Whattheywanttoseeistheoldstonewellbesideit﹣andtheiron﹣boundwaterbucketthat'sputonitsedge. TwohundredyearsagothisfarmhousewasthehomeofSamuelWoodworth.DuringthelongsummersofhischildhoodyoungSamuelwouldoftenpauseatthewell.Itwasawelcomebreakespeciallyonahotafternoon.Onsuchadayhewouldeagerlydrawabucketfulofcoldwaterandsatisfyhisthirstwitharefreshingdrink. WhenhewasfourteenWoodworthleftScituateforNewYorkCitywherehestartedhisownnewspaper.Laterheworkedasaneditoratothernewspapersandmagazineswhilewritingnovelsplaysandpoetryinhissparetime.Hislifewasbusyandherarelyhadtimetovisitthefamilyfarm. ButWoodworthneverstoppedthinkingofhisScituatehome.AfterworkoneeveningWoodworthpouredhimselfaglassofcitywater.AfterthatheremarkedtohiswifeLydiahowwonderfulitwouldbetohavealongcooldrinkfromtheoakenbucketathisfather'swell.LydiahadasuggestionWhynotputittopoetry? ItwasasuggestionWoodworthcouldnotresist.ThatnighthewroteTheBucket.Inithecapturedtheworldofhischildhoodonahotsummerdayandthesimplejoyofstoppingforadrinkathisfather'swell. Hispoemwasaninstantsuccess.Itseemedtotoucheveryonewhohadeverbeenhomesick.AttheheightofitspopularityTheOldOakenBucketasitcametobecalledwastranslatedintofourlanguagesandthewordsweresettoapopulartuneofthetime.OvertheyearscountlesspeoplehavereadorsungWoodworth'sodetohisboyhood.TodayitistheofficialsongofScituateMassachusetts. 1Whydoestheauthoruseflashback倒叙inParagraph2? A.Tohelpreadersappreciatethewellwater. B.Tohelpreadersenjoycitylife. C.TohelpreadersunderstandhowhardWoodworthwas. D.TohelpreaderslearnaboutWoodworth'schildhoodlife. 2WhatwasWoodworth'spurposeforwritingthepoem? A.Tosharehisopinion. B.Tointroducehishometown. C.Toexpresshisemotion. D.Tomakesomecomplaints. 3Whatcanweinferfromthetext? A.Thewaterinthewelltastedbetterthanthatinthecity. B.ThewellandthewaterhadadeepimpressiononSamuel'smind. C.Woodworth'swiferemindedhimofthewellandsuggestedputtingittopoetry. D.Notmanypeoplepaidmuchattentiontothepoematfirst. 4Whichofthefollowingcanbethebesttitleforthetext? A.TheOldOakenBucket B.LivinginNewYork C.GrowingupontheFarm D.GoodSuggestionsfromWife
一列向右传播的简谐横波某时刻波形如图．已知波速为8m/s从这一时刻起经过1.75s质点M通过的路程是cm波的传播距离是m．
15分Chinahassplendidculturewithalonghistory.Chineseoperaisoneofthe1olddramaticartformsintheworld.DuringtheTangDynastytheEmperorTaizongestablishedanoperaschool2thepoeticnameLiyuanPearGarden.SincetheYuanDynastyencouragedbycourtofficialsandemperorsit3becomeatraditionalartform.DuringtheQingDynasty4becamefashionableamongordinarypeople.Performances5watchintearoomsrestaurantsandevenontemporarystages. Itdevelopedfromfolksongsdancetalkingantimasque滑稽戏andespeciallydistinctivedialecticalmusic.Graduallyitcombinedmusicartandliteratureintooneperformanceonthestage.6accompanybytraditionalmusicalinstrumentsactorspresentuniquemelodieswhichmaysoundstrangeto7foreignaswellasbeautifullywrittendialogueswhichareofhighliterary8valuable.ThesedialoguesalsopromotedthedevelopmentofdistinctliterarystylessuchasZajuintheYuanDynasty.ForChineseespeciallyolderfolks9listentothiskindofoperaoccasionallyis10realpleasure.
6分Youknowthefeelingthatyouhaveleftyourphoneathomeandfeelanxiousasifyouhavelostyourconnectiontotheworld.Nomophobia无手机恐惧症affectsteenagersandadultsalike.Youcanevendoanonlinetesttoseeifyouhaveit.LastweekresearchersfromHongKongwarnedthatnomophobiaisinfectingeveryone.Theirstudyfoundthatpeoplewhousetheirphonestostoreshareandaccesspersonalmemoriessuffermost.Whenuserswereaskedtodescribehowtheyfeltabouttheirphoneswordssuchashurtneckpainwasoftenreportedandalonepredictedhigherlevelsofnomophobia. ThefindingsofourstudysuggestthatusersregardsmartphonesastheirextendedselvesandgetattachedtothedevicessaidDr.KimKiJoon.Peopleexperiencefeelingsofanxietyandunpleasantnesswhenseparatedfromtheirphones.MeanwhileanAmericanstudyshowsthatsmartphoneseparationcanleadtoanincreaseinheartrateandbloodpressure. Socanbeingwithoutyourphonereallygiveyouseparationanxiety?ProfessorMarkGriffithspsychologistanddirectoroftheInternationalGamingResearchUnitatNottinghamTrentUniversitysaysitiswhatisonthephonethatcounts﹣thesocialnetworkingthatcreatesFomofearofmissingout. Wearetalkingaboutaninternet﹣connecteddevicethatallowspeopletodealwithlotsofaspectsoftheirlivessaysGriffiths.Youwouldhavetosurgicallyremoveaphonefromateenagerbecausetheirwholelifeisrootedinthisdevice. Griffithsthinksattachmenttheorywherewedevelopemotionaldependencyonthephonebecauseitholdsdetailsofourlivesisasmallpartofnomophobia.ForscreenagersitisFomothatcreatesthemostseparationanxiety.Iftheycan'tseewhat'shappeningonSnapchatorInstagramtheybecomepanic﹣strickenaboutnotknowingwhat'sgoingonsocially.Buttheyadaptveryquicklyifyoutakethemonholidayandthere'snointernetsaysGriffiths. 1WhichofthefollowingmayDr.KimKiJoonagreewith? A.Wewastetoomuchtimeonphones. B.Phoneshavebecomepartofsomeusers. C.Addictiontophonesmakesmemoriessuffer. D.Phonesandbloodpressurearecloselylinked. 2AccordingtoGiffithswegetnomophobiabecause. A.weareaccustomedtohavingaphoneonus B.weneedourphonestohelpusstoreinformation C.weworrywemaymissoutwhatourfriendsaredoing D.wefearwithoutphoneswewillrunintoalotoftrouble 3Wherecanyouprobablyfindtheabovepassage? A.Inaresearchreport. B.Inafashionbrochure. C.Inasciencetextbook. D.Inapopularsciencemagazine.
宇航员的航天服内充有气体若出舱前航天服内气体压强为p体积为V到达太空后气体体积变为2V温度不变此时航天服内的气体压强为．1965年3月18日苏联航天员列昂诺夫在返回飞船时遇到了意想不到的困难他的航天服有些向外膨胀很难从密封舱的接口处钻回舱内他启动了应急装置减小航天服的体积安全地回到密封舱内．你认为该应急装置可以如何减小航天服体积．
8分InAmericancountrysidethemessagewehearisthisGoandgetaneducation.Leaveyoursmalltownandmakesomethingofyourself.Successandopportunityarefoundelsewhere.Leave.Co. AftergraduatingfromahighschoolinHelenaArkansasIdidgo. IwenttoColbyCollegeinMaine.IhadvisitedtheschoolaheadoftimesoIknewwhatIwasgettingmyselfinto.Iknewaboutthedifferenceinweather.Iunderstoodthedifferenceinsocialatmosphere.ButIwantedtostretchmyselfandgetoutofmycomfortzone.Andyouknowwhat?Iabsolutelylovedmytimethere.Butonethingtookmebysurprise﹣thelackofcountrysiderepresentation.MostoftheotherstudentsatColbywerefrombigcitiesNewYorkBostonLosAngelesSanFrancisco…AndwhenIhadconversationswiththesestudents﹣inoroutsideofclass﹣wealmostalwaysfocusedontopicsfacinglargeAmericancities.Inmyeducationclassesitwasalwaysurbanthisandurbanthat. ItwaslikesmalltownAmericadidn'texist. Andthisurbaninterestdoesn'tjusthappenincollege.Iwenttoaneducationconferenceacoupleofyearsagoandaprofessor﹣someonewhohadbeenattheforefrontofeducationalreform﹣wastheretodeliverakeynote.Iwaschosentobepartofasmallgroupthatgottomeetwithhim.SotherewewerefiveorsixofussitinginaroomandIaskedhimWhatareyourthoughtsonthestateofeducationinthecountryside?Andthismanwasspeechless. I'llneverforgetthatmoment.Itspeakstoalargertruth.Townslikemineareforgotten. Thistrendofexportingtalentandresourcestoourbigcities﹣thismindsetofleavingsmalltownsandnevercomingback﹣Idon'twanttoaddtothatmovement.Iwanttoreversethatmovement. Nowit'smyturntohelppeopleyoungerthanme.Andyouknowwhat?I'masixthgradeteacherinHelenanow. 1WhatdopeopleinAmericancountrysidethinkofthefutureoftheyouthathome? A.Secure. B.Fragile. C.Promising. D.Bright. 2Whatdidtheauthorfindinhiscollegeclassroom? A.Studentschattedfreely. B.Countrysidewasignored. C.Hewaslookeddownupon. D.Studentsconcentratedoneducation. 3Howwouldtheauthorfeelabouttheprofessor'sreaction? A.It'semotional. B.It'snatural. C.It'spositive. D.It'sdisappointing. 4Whatistheauthordoingnow? A.Teachinginacollege. B.Fightingforthemovement. C.Workingwiththeprofessor. D.Devotinghimselftohishometown.
Whyshouldmankindexplorespace?Whyshouldmoneytimeandeffortbespentexploringandresearchingsomethingwithsofewapparentbenefits?WhyshouldresourcesbespentonspaceratherthanonconditionsandpeopleonEarth?Thesearequestionsthatunderstandablyareveryoftenasked. Perhapsthebestanswerliesinourgeneticmakeupashumanbeings.Whatdroveourancestorstomovefromthetreesintotheplainsandonintoallpossibleareasandenvironments?Thewiderthespreadofaspeciesthebetteritschanceofsurvival.Perhapsthebestreasonforexploringspaceisthisgenetictendencytoexpandwhereverpossible. Nearlyeverysuccessfulcivilizationhasexploredbecausebydoingsoanydangersinsurroundingareascanbeidentifiedandpreparedfor.Withoutknowledgewemaybecompletelydestroyedbythedanger.Withknowledgewecanlessenitseffects. Explorationalsoallowsmineralsandotherpotentialresourcestobefound.Evenifwehavenoimmediateneedofthemtheywillperhapsbeusefullater.Resourcesmaybemorethanphysicalpossessions.Knowledgeortechniqueshavebeenacquiredthroughexploration.Thetechniquesmayhavemedicalapplicationswhichcanimprovethelengthorqualityofourlives.Wehavealreadybenefitedfromotherspin﹣offsincludingimprovementsinearthquakepredictioninsatellitesforweatherforecastingandincommunicationssystems.Evennon﹣stickpansandmirroredsunglassesareby﹣productsoftechnologicaldevelopmentsinthespaceindustry! Whilemanyresourcesarespentonwhatseemsasmallreturntheexplorationofspaceallowscreativebraveandintelligentmembersofourspeciestofocusonwhatmayservetosaveus.Whilespacemayholdmanywondersandexplanationsofhowtheuniversewasformedorhowitworksitalsoholdsdangers.Thedangerexistsbutknowledgecanhelphumanbeingstosurvive.Withouttheabilitytoreachoutacrossspacethechancetosaveourselvesmightnotexist. WhileEarthistheonlyplanetknowntosupportlifesurelytheadaptiveabilityofhumanswouldallowustoliveonotherplanets.Itistruethatthelifestylewouldbedifferentbuthumanlifeandcultureshaveadaptedinthepastandsurelycouldinthefuture. 1Whydoestheauthormentionthequestions? A.Toexpresshisdoubts. B.Tocomparedifferentideas. C.Tointroducepointsfordiscussion. D.TodescribetheconditionsonEarth. 2Whatisthereasonforexploringspacebasedon? A.Humansarenatureborntodoso. B.Humanshavethetendencytofight. C.Humansmayfindnewsourcesoffood. D.Humansdon'tliketostayinthesameplace. 3Theunderlinedwordspin﹣offsinParagraph4probablyrefersto. A.survivalchances B.unexpectedbenefits C.potentialresources D.physicalpossessions 4Whichofthestatementscanbestsumupthepassage? A.Spaceexplorationhascreatedmanywonders. B.Spaceexplorationprovidesthebestvalueformoney. C.Spaceexplorationcanbenefitscienceandtechnology. D.SpaceexplorationmayhelpusavoidpotentialproblemsonEarth.
15分LastyearmybrotherandIwenttoMiamiforavacation.Someofmyfriendswhohadbeentherebeforesaiditwas1wonderfulholidaydestination.Beforewewentwehadplannedformonths.Whenthedaycamewewereready. Sinceitwasthefirsttimewe2betherewewereprettyexcited.Afterourplanelandedwewenttothehotel.Wehadmade3wereservationsixmonths4earlybutthemanatthefrontdesksaidtherehadbeenamistake.We5tellthatourroomshadn'tbeenreservedforthatweek6fortheweekafter.Ididn'tunderstandwhythiswouldhappenandmycreditcardhadalreadybeenchargedforthereservation.What'sworsethehotelhadbeenfullybooked.Whenwe7wonderwhattodothemanagercameout.Shewas8surprisehelpful.SheapologizedforthemistakeandgaveusaspareVIProomonthetopfloor.Wehadneverstayedinsuchanamazingroomandweweren'tchargedextra. ThenextdaymybrotherandIwenttothebeach9somepeoplewereplayingvolleyball.Wegotalittle10sunburnbutthedayhadbeensorelaxingthatwedidn'tmind.
磁体的磁感线是
8分It'satthistimeoftheyearthatmarathonrecoverynotmarathontrainingstartstotakecenterstage. Researchindicatesthatthemuscledamagefromrunningamarathoncanlastuptotwoweeks.Theresearchalsoindicatesthatmusclesoreness肌肉酸痛isnotagoodindicatorofmuscularhealing.Inotherwordsjustbecauseyouaren'tsoreanymoredoesn'tmeanthatyouarefullyhealed.Thisisthedangerformarathonrunnerspost﹣marathonmuscularsorenessfadesafterafewdaysbutminordamagewithinthemusclecellsremains.Ifyoureturntofulltrainingtoosoon﹣runningmoreandfasterthanthetissuesarereadyfor﹣youriskdelayingfullrecoveryandthechancetogetreadyforyournextgoal. Thesolutionitappearsistorecognizeandacceptthatthemuscleswilltakeawhiletohealandtobepreparedtotakeiteasyforthefirstcoupleofweeksevenlongerifyou'reparticularlysoreafteryourmarathon.Whiletheresearchisn'tverypromisingwhenitcomestothingstodotoreducesorenessandaidhealingacoupleofconceptsappeartohelp.Firstprovidinggentlebloodflowtotheareahelpsbringhealingnutrientsintothemusclesandalsohelpstoremovewasteproductsanddamagedtissue.Walkingandgentlemassage按摩canhelpparticularlyinthefirstfewdaysafteramarathon.Oncemusclesorenesshassignificantlyreducedusuallytwotofourdaysaftertheracelightjoggingcancommence.Justbemindfultorunveryslowly. Norunnerwantstogetsuperfitandthenlosethatduringtherecoveryprocess.Butsinceyoumustreduceyourtrainingloadfollowingyourmarathonitcanbedifficultastohowmuchandhowsoontoinsertrunningintoyourpost﹣marathontraining. 1Whenshouldmarathonrunnersreturntofulltraining? A.Abouthalfamonthafterthecompetition. B.Afewdaysaftersorenessdisappears. C.Beforethetissuesrecovercompletely. D.Beforethenextgamedrawscloser. 2Howcanmarathonrunnersreducetheirmusclesoreness? A.Throughfamilycare. B.Bydoinggentleexercise. C.Throughmedicaltreatment. D.Byremovingdamagedtissue. 3Whichofthefollowingbestexplainscommenceunderlinedinparagraph3? A.Fit. B.Heal. C.Start. D.Mend. 4Whatcanbeasuitabletitleforthetext? A.RecoveryafterMarathon B.SorenesswithSports C.HealingMuscleSoreness D.ReducingTrainingLoad
电场强度定义式为E＝也可用类似的方法来描述地球产生的引力场中某点的场的强弱．已知地球质量为M半径为R地表处重力加速度为g引力常量为G一质量为m的物体位于距地心2R处的某点则该点处引力场强度为
10分 StepsforaSuccessfulCollegeApplication Whenitcomestogettingintothecollegeofyourchoiceyourcollegeapplicationisthemostimportanttoolyouhaveinyourhands.1whileabadonecanlandyouatthebottom.Keepthefollowingtipsinmindwhenyouaregoingthroughthecollegeapplicationprocessandyou'llbeontheroadtoadmission. BePrepared 2carefullylookoverallthequestionsandrequirements.Dedicateapagetoeachcollegewithachecklistofeverythingyou'llneedtosubmitsuchastranscriptsrecommendationstheessaycopiesofawards/certificatesetc. 3 FormerRecordsTechnicianCarmenHuffsaysthebestthingstudentsdoistogettheirapplicationsearly﹣oratleastbythedeadline.Collegesanduniversitiesreceivesomanyapplicationsthattheydon'thavethetimetoacceptlateones.Themoretimeyougivethecollegeoruniversitytoprocessyourapplicationthemoretimeyou'llhavetodealwithanyproblemsthatmightariseHuffsays. WatchYourGPAandTestScores Thisisthefirstthingthatmostuniversitieslookat.Forexamplemostfour﹣yearcollegesdon'thaveaGPArequirementbuttopIvyLeagues常春藤联盟usuallyonlyacceptstudentswitha3.5orhigherGPA.HoweverifyourGPAisweakdon'tgiveupapplying.4 WriteanAmazingEssay Agreatessaycanhelptipthebalanceinyourfavor.5.Manycollegesrequiretwoessaysoneshortandonelong.Whatyouwritenotonlyshowshowliterateyouarebutalsoprovidesthereaderwithanimpressionofyourvaluesandbeliefs. A.BeOnTime B.BePatientandDetermined C.Whenyouhaveatestoranexam D.Whenyoufirstreceivetheapplication E.Agreatapplicationcanzipyoutothefrontoftheline F.Sotakethetimetothinkyouressaythroughcarefully G.Insteadbesuretoemphasizeyourothergoodqualitiessuchasanyawardsorcommunityinvolvement
图甲是沙摆装置细沙均匀漏出同时匀速拉动纸板．图乙是细沙在纸板上形成的曲线其粗细不均匀主要是因为沙漏从最高点摆动到最低点的过程中
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