首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
如图所示，将一块重力为G、体积为V的物块，用细线系着浸没在装有水的圆柱形容器内，容器中水的深度由h1上升到h2（水无溢出，容器的重力和容器壁的厚度忽略不计）．求：（答案均用题中物理量符号表示，水的密...
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
如图所示将一块重为5N体积为150cm3的石块用细线系着浸没在装有水的圆形容器中容器中的水的深度由2
如图所示将一重力为18N体积为2×10﹣3m3的蜡块用细线系在弹簧测力计的挂钩上将它浸没在酒精中则蜡
如图所示将一块重为5N的物体用细线系着浸没在装有水的圆柱形容器中容器中水面的高度由14cm上升到16
如图所示有两个小球M.和N.密度分别为ρM和ρN图7甲中细线的一端固定在杯底另一端拴住小球M.使其浸
G.M＜G.N;
V.M＞V.N;
F.N＜F.M;
F.N＞F.M.
如图所示将一块重为3N体积为100cm3的石块用细线系着浸没在装有水的圆柱形容器中容器中水的深度由1
为了探究物体的浮沉条件实验室提供了如下器材弹簧测力计烧杯金属块细线水及其他简单辅助器材实验步骤如下1
2015•泰安如图所示将一块重为5N的物体用细线系着浸没在装有水的圆柱形容器中容器中水面的高度由14
将一块重为3N体积为100cm3的石块用细线系着浸没在装有水的圆柱形容器中容器中水的深度由10cm上
如图所示将一重为18N体积为的蜡块用细线系在弹簧测力计的挂钩上将它浸没在酒精中则蜡块受到的浮力是__
如图某物块用细线系在弹簧测力计下在空气中称时浸没在水中称时浸没在盐水中称时示数如图所示则物块受到盐水
如图7所示将一块重为3N.体积为100cm3的石块用细线系着浸没在装有水的圆柱形容器中容器中水的深度
为了探究物体的浮沉条件实验室提供了如下器材弹簧测力计烧杯金属块细线水及其他简单辅助器材实验步骤如下1
如图7-10所示将一块重为3N体积为100cm3的石块用细线系着浸没在装有水的圆柱形容器中容器中水的
小明用弹簧测力计吊着一物块在空气中称时读数为3N当把物块浸没在煤油中称时读数为2.5N此时物块受到煤
如图5所示将重2.2N的物块浸没在水中称量时弹簧测力计的示数为1.2N则物块受到的浮力为N物块的体积
如图所示某物块用细线系在弹簧测力计下在空气中称时示数是浸没在水中称时示数是则此时物块受到水的浮力为_
一块实心冰块用细线系着静止地浸没在水中则当冰块完全熔化后水面将
上升;
下降;
不变 ;
无法确定.
为了探究物体的浮沉条件实验室提供了如下器材天平烧杯金属块细线水及其他简单辅助器材.实验步骤如图g取1
如图所示将一块重为3N体积为100cm3的石块用细线系着浸没在装有水的圆柱形容器中容器中水的深度由1
用细线竖直拉着一长方体物体将物块从盛水的烧杯上方缓慢下降直至完全浸没水中物块下降过程中所受浮力F.随
热门试题
更多
Everymotherhasforherchildren. A.affection B.affect C.effect D.effectiveness
theprogramtheyhavetostaythereforanothertwoweeks. A.Notcompleting B.Notcompleted C.Nothavingcompleted D.Havingnotcompleted
Neverforasecondtheboysaysthatmyfatherwouldcometomyrescue. A.Idoubted B.doIdoubt C.Ihavedoubted D.didIdoubt
SlaverywasintheUSinthe19thcenturyandslavesweregivenequalrights. A.abused B.adopted C.abolished D.absorbed
﹣Whotoldyouabouttheresultoftheexam? ﹣Theteacher. A.incharge B.oncharge C.atcharge D.inthecharge
breaksthelawshouldbepunished. A.Nomatterwho B.Whoever C.Who D.All
Yourworkwouldbemuchbetteryouarealwaysinsuchahurry. A.when B.because C.once D.unless
Shewantedtoiherstudentsbyhavingthemlistentothisinstructivespeech.
Geneticengineeringinitsbroadestdefinitionmeanstocontrolaspeciessothataparticulartraitisincreasedinthepopulation.Atraitishowanorganism有机体looksoractsorwhatitdoes.Havingbrowneyesisatrait.Flyingincirclesisatrait.Climbingtreesisatrait. Theearliestformsofgeneticengineeringoccurredonfarms.Peopleselectedseedsfromplantsthathadmorefruitproductionortastierleavesthanotherplantsoftheirtypes.Thentheychosetosavetheseedsfromthebestofthatgrouptosowthenextyear.Soyearbyyearthefarmersproducedbetterandbettercrops.Thistypeofactivityprobablyhasbeengoingonsincemankindfirstsettledinvillagesandbeganmakingalifeforthemselvesinonelocationabout12000yearsago! Thesamesortofthingwouldhavealsohappenedwithanimals.Forexamplepeoplechosetoeattheanimalsthatdidn'thavefavorabletraitsandlettheanimalswiththefavorabletraitsreproduce.Itwasthousandsofyearsbeforemankindfiguredouthowplantsandanimalsreproducethemselves.Withthisknowledgepeoplecouldpollinate授粉plantsbyhandorkeepapairofanimalstogetherinordertodeliberatelycauseanincreaseinafavorabletrait. Itwasonlyinthelast250yearsthatscientistsbeganfiguringoutchromosomes染色体andgenesandtheroletheyplayinthewayonegenerationpassesitstraitsontothenext.Andit'sonlybeeninthelast30yearsthatscientistshavebeenabletocutoutspecificgenesfromoneorganismandputtheminanother.Itisthis30﹣year﹣oldtechnologythatisdescribedbythenarrowdefinitionofgeneticengineering.Mankindhaslongbeenabletohaveadeliberateimpactontheworldaroundhim.Henowpossessesthetoolstodeliberatelyimpacthimself.Somepeopleareafraidofwhatmightbedonewiththatpower. 1Thetextismainlydevelopedby. A.askingquestions B.examiningdifferences C.makingcomparisons D.givingexamples 2Paragraph2mainlytalksabout. A.thespreadofgeneticengineering B.theadvantageofgeneticengineering C.theoriginalapplicationofgeneticengineering D.thepopularityofgeneticengineering 3Theunderlinedwordtheminthelastparagraphrefersto. A.specificgenes B.specialtraits C.chromosomes D.scientists 4Whatcanwelearnaboutgeneticengineeringfromthelastparagraph? A.Ithasahistoryof250yearsbythenarrowdefinitionofgeneticengineering. B.Scientistsdon'tknowhowtomakegooduseofit. C.Peoplehaveamisunderstandingofitinthepast30years. D.Itisbecomingapowerfultoolofmankind.
theaidofasticktheoldmanalkedpainfullyalongthestreet. A.Under B.With C.On D.In
Shynessisthecauseofmuchunhappinessforagreatmanypeople.Shypeopleareanxiousandself﹣consciousthatistheyareconcernedwiththeirownappearanceandactionstoomuch.NegativethoughtsareconstantlyoccurringintheirmindsWhatkindofimpressionamImaking?Dotheylikeme?DoIsoundstupid?AmIwearingunattractiveclothes? Itisobviousthatsuchuncomfortablefeelingsmustaffectpeopleunfavorably.Aperson'sself﹣conceptisreflectedinthewayheorshebehavesandthewayapersonbehavesaffectsotherpeople'sreactions.Ingeneralthewaypeoplethinkaboutthemselveshasadeepeffectonallareasoftheirlives. Shypeoplewhohavelowrespectarelikelytobepassiveandeasilyinfluencedbyothers.Theyneedfaiththattheyaredoingtherightthing.Shypeopleareverysensitivetocriticism.Itmakesthemfeelinferior自卑.Theyalsofinditdifficulttobepleasedbypraisesbecausetheybelievetheyareunworthyofpraise.AshypersonmayrespondtoapraisewithastatementlikethisoneYou'rejustsayingthattomakemefeelgoodIknowit'snottrue.Itisclearthatwhileself﹣awarenessisahealthyqualityoverdoingitisharmful. Canshynessbecompletelygotridoforatleastreduced?Fortunatelypeoplecanovercomeshynesswithdeterminationsinceshynessgoeshandinhandwithlackofselfrespect.Itisimportantforpeopletoaccepttheirweaknessaswellastheirstrengths.Eachoneofushashisorherowncharacteristics.Weareinterestedinourownpersonalways.Thebetterweunderstandourselvestheeasieritbecomestoliveuptoourchancesforarichandsuccessfullife. 1Thefirstparagraphismainlyabout. A.thecauseofshyness B.theeffectofshynessonpeople C.thefeelingsofshypeople D.thequestionsinthemindsofshypeople 2Accordingtothewriterself﹣awarenessis. A.harmfultopeople B.aweakpointofshypeople C.thecauseofunhappiness D.ahealthyquality 3Whatistheshypeople'sreactiontopraise? A.Theyarepleasedbyit. B.Theyfeelitisnottrue. C.Theyareverysensitivetoit. D.Theyfeeltheyareworthyofit. 4Wecanlearnfromthepassagethatshynesscan. A.beovercomewithdetermination B.helpustoliveuptoourfulldevelopment C.enableustounderstandourselvesbetter D.havenothingtodowithlackofselfrespect
TheoldwelllookedafterbythegovernmentinChina. A.is B.are C.hasbeen D.was
I'dliketobuyahouse﹣﹣﹣moderncomfortableandinaquietneighborhood. A.inall B.atall C.afterall D.aboveall
HadIknownaboutthiscomputerprogramahugeamountoftimeandenergy. A.wouldhavebeensaved B.hadbeensaved C.willbesaved D.wassaved
Whenwesawtheroadsnowwedecidetospendtheholidayathome A.blockingup B.blockedup C.blockingwith D.blockedwith
Duringthecourseofalifetimeweallmakemistakes.Andoftenwetakeforgrantedwhatwehavethinkingthatwe1whatwealreadyhaveorbelievingthatwewillneverneedanyoneto2usoutfromdifficultand3times. Suchwasthe4ofCecilia.Ceciliahadagreatjobanicehouseandeverythingsheneeded5shewasnotakindpersonforseveralreasonsthatbecame6onceyougottoknowher.Thefirstthingwasherlackof7forotherswhowerenotasfortunateasshewas.Shewouldnothelpanyone8wouldsheevenbegintoexpressanysympathyforanyone'stroubles.Her9wasthattheywerejusttoolazy. Butthencamethecatastrophicday.Herhusbandgotintofinancialdifficultytothepoint10hewasforcedtodeclarebankruptcy破产.Shefoundthatshewastheonewho11nothing. Nowshewas12forhelp.Shealsofoundoutthatherparentswereunwillingtohelpherbut13forherhisfamilywaswillingandabletohelpthemthroughthesedifficulttimesdespitethe14thatshehaddeliberatelykeptthemoutofherlife.15Ceciliawasassistedthroughchallengingtimesonce16shechangedtohertrueself. Butthisisnotthemainpointofthestory.Weallneedhelp17alonglife'spathwhetherwethinkwewillornot.Andifyouaretheone18helpjustrememberthisnomatterwhat19lateryouwillalwaysbe20inthefactthatyouhaveremainedstrongandtruetoassistthosethatneedyourhelp. 1A.realize B.treasure C.deserve D.manage 2A.help B.protect C.keep D.assume 3A.inspiring B.challenging C.pleasing D.moving 4A.character B.attitude C.case D.experience 5A.Therefore B.Otherwise C.Normally D.However 6A.obvious B.familiar C.unclear D.uncertain 7A.affection B.sympathy C.confidence D.caution 8A.so B.and C.or D.nor 9A.plan B.view C.promise D.advice 10A.when B.that C.where D.what 11A.learned B.shared C.knew D.had 12A.desperate B.enthusiastic C.considerate D.fearful 13A.unluckily B.fortunately C.sadly D.naturally 14A.section B.reason C.fact D.difficulty 15A.Nowthat B.Eventhough C.Aslongas D.Incase 16A.up B.away C.over D.apart 17A.somewhere B.everywhere C.anywhere D.nowhere 18A.refusing B.receiving C.owing D.giving 19A.happens B.comes C.develops D.forms 20A.involved B.anxious C.absorbed D.secure
Theyacertainamountofworkingexperiencethroughvolunteerwork. A.accommodated B.accomplished C.accumulated D.attempted
Therewasastreamofvisitorstothehouse. A.constant B.content C.concrete D.conservative
HowtoProtectYourselffromHackersOnline Anincreaseincyber﹣attacks网络攻击makestheInternetseemlikeascaryplacethesedays.Howcanindividualsprotectormakeitmoredifficultforhackerstoaccesstheirinformation?Hereareseveraltipsthatcanhelpyouprotectagainstcyber﹣attacks 1 Hardpasswordsincludeupperandlowercaselettersnumbersandspecialcharacters.Theyshouldbeatleasteightcharactersinlength.Theyshouldalsonotspelloutwordseasyforhackerstofindlikeyourpet'snameorthenameofafamilymember. Changeyourpasswordregularly Averycommonmistakemadebyusersistocreateonehardpasswordbutthenneverchangeit.Rememberingalonglistofcomplicatedpasswordscanbedifficult.Butnopasswordisunbreakable.Hackersarebetterabletohackmultipleaccountsifthoseaccountsallhavethesamepassword.ApasswordmanagementservicelikeDashlaneorPasswordBoxcanhelpyoukeeptrackofhardpasswords.2 Clearyourbrowser浏览器history Thisgoesforallthedevicesyouuseinaday﹣yourhomecomputeryourworkcomputeroryourfriend'siPad.InternetbrowserslikeFirefoxorChromekeeptrackofwhereyou'vebeenandwhatyou'vedoneonline.Theykeeprecordsofeverysiteyouvisited.3Itisveryeasyforanyonewhoseesthatinformationtostealadetailedrecordofyouronlineactivities. DonotusefreeWi﹣Fi 4Oftenauserdoesnotneedapasswordtoconnecttothesewirelessnetworks.Theseservicesmightbeusefulbutthey'realsoaneasywayforhackerstoaccesseverythingonyourdevice. Useanti﹣virusprotection Therearemanyanti﹣virusservicesavailableforusers.5Someanti﹣virusservicesareevenfree.Theyareagreatwaytohaveaprofessionalhelpkeepingusersonestepaheadofhackers. A.Becarefulwhileusingthumbdrive. B.Theseservicespermituserstoeasilystoreandsecuretheirpasswords. C.Makeyourpasswordhardertohack. D.Theycanoffermanydifferenttypesofcomputerprotection. E.AnincreasingnumberofpublicplacesnowofferfreewirelessaccesstotheInternet. F.Informationaboutwhatyousentfromorsavedonyourcomputercanbekeptfordaysorweeks.
Thedoctordideverythinghecouldthepatient. A.save B.tosave C.saving D.saved
MayIaskaquestionafterclassSir? butnotduringmylunchbreak. A.I'msorry B.Anytime C.Certainly D.Goahead
Afterseemedaverylongtimethebadly﹣woundedsoldiercamebacktolife. A.that B.it C.which D.what
MakingShortVideos Apictureisworthathousandwordsorsotheysay.Wellmotion运动picturescancontainevenmorememories.1Herearesomeappsyoucanusetomakeyourownshortvideos. Qupeiyin.cn RecitinglinesfrommoviesisaneffectiveandclassicwaytolearnEnglish.Sowhatifyoucoulddub配音recordingsaccompaniedbymovieclips剪辑andthensharethemwithfriends?2Younameit.Bycontributingyourvoiceyoucaneithermimic模仿theoriginalsoundtrackorcreatesomethingcompletelynewofyourown. Shorts 3WiththehelpoftheShortsappyoucanmakepicturesinyouralbumintoaslideshow.Choosefromanyoftheoff﹣the﹣shelfthemes﹣﹣﹣holidaytravelfriendshipandpartyforexample﹣eachmatchedwithitsownthememusicandslidebackground.Butifyou'renotsatisfiedwiththecombinationsfeelfreetodoalittlechangebyaddingtexttothepicturesorreplacingthemusicwithsomethinginyourownplaylist. VivaVideo Videomakingandeditingonceseemedawfullyhard.4Butthisappwilleaseyouintothefieldwithstraight﹣forwardfunctionsandcleardirectiontohelpyoucreateyourownvideostory.Apartfromfilterstickersandtextthecoolestpartofthisappisthatyoucanwritethenarrativesyourselfandaddyourownvoicetothevideo.5VivaVideorequiresarelativelypowerfulphonetorunsmoothly. A.Buthereisalittlereminder. B.That'swhyshortvideosarebecomingpopular. C.Theseappshaveavarietyofidentifications识别. D.ThisapphasmoviescartoonslecturesTVseries. E.Newbies网络新手andamateursdidn'tdaretoevengiveitatry. F.Videosandpicturesaren'tonlyforseparatepurposes. G.VideomakingandeditingiswhatApplefanswanttotry.
Nodecisionaboutanyfutureappointmentuntilallthecandidateshavebeeninterviewed. A.willbemade B.ismade C.isbeingmade D.hadbeenmade
Peoplebetteraccesstohealthcarethantheyusedtoandthey'relivinglongerasresult. A.willhave B.have C.had D.hadhad
Itwasthecultureratherthanthelanguagemadeithardforhimtoadapttothenewenvironmentabroad. A.where B.why C.that D.what
Weshouldequipourchildagoodeducation. A.to B.in C.with D.for
ThehotelslaunchednewservicestocaterthegrowingnumberofChinesevisitorstotheregion. A.to B.in C.on D.for
Theydonotprovideaenergysupply. A.stubborn B.stainable C.sustainable D.containable
Beingphysicallyactivethreetimesaweekreducestheoddsofbeingdepressedbyabout16%accordingtonewUCLresearchcarriedoutaspartofthePublicHealthResearchCentre. ThestudypublishedinJAMAPsychiatryfoundatwo﹣wayrelationshipbetweendepressionandphysicalactivity.Peoplewhoincreasedtheirweeklyactivitywerereportedtohavefewerdepressivesymptomsbutthosewithmoredepressivesymptomswerelessactiveparticularlyatyoungerages. Researchersfollowed11135peoplebornin1958upuntiltheageof50recordingdepressivesymptomsandlevelsofphysicalactivityatregularintervalsinadulthood.Theyfoundthateachadditionalactivityperiodperweekreducedoddsofdepressionby6%.InEngland19%ofmenand26%ofwomenarecurrentlyclassedasinactiveandthisstudysuggeststhatactivitycouldsignificantlyimprovetheirmentalaswellasphysicalhealth. Assumingtheassociationiscausalphysicalactivityhasaprotectiveeffectagainstdepression.Ifanadultbetweenhistwentiesandfortieswhoisn'tphysicallyactivebecameactive3timesperweekhewouldreducehisrisksofdepressionbyabout16%saidDrSnehaloftheUCLInstituteofChildHealthleadauthorofthestudy. ProfessorMarkDirectorofthePublicHealthResearchCentresaidManypeoplearealreadyawareofthebenefitsofphysicalactivityontheirgeneralhealthbutnowweareseeingmoreevidencethatsuggestsitalsohasapositiveeffectonaperson'smentalwell﹣being.Thelatestresearchhighlightsjusthowimportantitistoensurethatpeopleareworkingandlivinginenvironmentsthatallowthemtobebothphysicallyactiveandmentallyhealthy. 1TheunderlinedwordoddsinParagraph1probablymeans. A.benefits B.intervals C.risks D.ages 2Accordingtothesecondparagraphifpeopleincreasetheirweeklyactivity. A.theirdepressivesymptomswillbefewer B.theirdepressivesymptomswillbemore C.theywillbecomemuchyounger D.theywillbecomemoredepressive 3WhichofthefollowingstatementsisTRUEaccordingtothepassage? A.DrSnehalthinksitisimportanttobebothphysicallyandmentallyhealthy. B.Theresearchshowsmenaremoreactiveinphysicalactivitythanwomen. C.Adultswhoinsistonphysicalactivitywillavoiddepressioncompletely. D.Increasingphysicalactivitycanfreepeoplefromdepressioninaway. 4Whatistheauthor'spurposeinwritingthepassage? A.Totellusafunstoryabouthowtoprotectusagainstdepression. B.Tointroducearesearchonthelinkbetweenphysicalactivityanddepression. C.Topersuadereaderstoincreasetheirweeklyactivity. D.Todescribethedisadvantagesofphysicalactivity.
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
教案备课库
湘公网安备 43130202000226号