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直角三角形纸片的两直角边长分别为6，8，现将△ABC如图那样折叠，使点A与点B重合，折痕为DE，则tan∠CBE的值是（ ）
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一个直角三角形的两条直角边分别为6和8那么这个直角三角形斜边上的高为
在一张直角三角形纸片的两直角边上各取一点分别沿斜边中点与这两点的连线剪去两个三角形剩下的部分是如图的
有一块直角三角形的绿地量得两直角边长分别为6m8m.现在要将绿地扩充成等腰三角形且扩充部分是以8m为
有一块直角三角形的绿地量得两直角边长分别为6m8m.现在要将绿地扩充成等腰三角形且扩充部分是以8m为
已知一个直角三角形的两边分别为68则此三角形斜边上中线长为___________
已知直角三角形的两条直角边长分别为6cm和8cm则这个直角三角形的外接圆的半径为cm.
在一张直角三角形纸片的两直角边上各取一点分别沿斜边中点与这两点的连线剪去两个三角形剩下的部分是如图所
直角三角形的两直角边长分别为6和8则斜边中线的长是.
在一张直角三角形纸片中分别沿两直角边上一点与斜边中点的连线剪去两个三角形得到如图4245所示的直
在一张直角三角形纸片中分别沿两直角边上一点与斜边中点的连线剪去两个三角形得到如图4245所示的直
在一张直角三角形纸片的两直角边上各取一点分别沿斜边中点与这两点的连线剪去两个三角形剩下的部分是如图所
直角三角形的两直角边长分别为6和8则斜边中线的长是
已知一个直角三角形的两边分别为68则此三角形斜边上中线长为.
某直角三角形的两直角边长分别为6cm8cm则此三角形斜边上的高的长是cm.
若一直角三角形两直角边长分别为6和8则斜边长为__________.
若直角三角形的三边分别为x68x＝________.
直角三角形两直角边长分别为6和8则它斜边上的高为______.
已知一个直角三角形的两条直角边分别为68则此三角形斜边是斜边上的高为.
在一张直角三角形纸片的两直角边上各取一点分别沿斜边中点与这两点的连线剪去两个三角形剩下的部分是如图所
在一张直角三角形纸片中分别沿两直角边上一点与斜边中点的连线剪去两个三角形得到如图8所示的直角梯形则原
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小明按图甲连接电路闭合开关灯泡L1的功率为P1．他将一个阻值大于L1的灯泡L2串联接入电路如图乙闭合开关后L1L2的功率分别为P1'P2'不计温度对灯泡电阻的影响电源电压恒定下列关系式正确的是
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Writingabookreviewisnotlikewritingafictionwhereyouhaveyourfreedomtoexpressanytypeofliterarymood.Hereyouarelimitedwithinthescopewhichisrelatedonlytothebookortheliteratureandnothingelse.Towriteaproperliteraryreviewyoushouldfollowsomeimportantdosanddon'tswhicharediscussedhere. Top3dos Selectaliteratureofyourchoiceandreaditthoroughly.Ifrequiredyoushouldreaditmultipletimesbeforeyoureallyframeuptheliteraryreviewinyourmind.Whilereadingtrytoassimilatethethoughtsandphilosophyoftheauthorbehindthebookandalsotoanalyzeallthecharactersandeventsdescribedintheliterarypiece.Starttopendownyourliteraryanalysisonlywhenyouhaveacompleteunderstandingofthebookandnotbeforethat. Prepareyourwrite﹣upbasedonyourunderstandingofthebook.Sinceyouarereviewingthebookyouropinionplaysanimportantrolehere.Ifyoupreferanyparticularcharacteroranyparticularinstancefromthebookthenexposethatcharacterorthesituationinyourreviewtogiveitmoreimportance.Alsodetermineyourpreferencewithsupportinglogic.Ultimatelyitisyourunderstandingofthebookanditcandifferfromothers'viewpoint.Butyoushouldsticktoyouropinion. Followaproperformattoconstructyourbookreview.Itshouldhaveaproperintroductionandaconclusionotherthantheusualsubjectbody.Distributethesubjectbodyinchaptersandparagraphstogiveanicestructuredlook.Alsoaddalistofreferencematerialattheendofthebook.Astructuredmaterialalwayscarriesagoodimpressionandalsoithelpsthereadertogothroughthearticleatease. Top3don'ts Bookreviewsarenotexactlymeantforwritingasummaryonthebooks.Theobjectiveofwritingabookreviewistoarousethecuriosityinthemindofthereaders.Ifsomeonementionseverythinginthesummarythentheactualintentionislost. Asmentionedearlieroneshouldnotcrossyourlimittowritealiteraryreview.Donotbringupunnecessarytopicstoincreasethelengthofthewrite﹣upwhichisnotatallrelatedtothebook.Thereaderswanttolearnaboutthebookandnotsomethingirrelevant.Alsoasmartandcrispwritinghelpstocreateapositiveimpression. Youcangothroughreferencebooksorarticlesonyoursubjectbeforeyoustartpreparingyourarticle.Butthatshouldbecompletelywiththeintentionofgettinghelpinyourunderstandingofthebook.Thesereferenceitemswillhelptostrengthenyourgriponthesubject.Butyoushouldnevercopyasinglelineoftextfromanyotherdocumentorwrite﹣up.Plagiarism剽窃inanyformisapunishableoffencebylaw.Itwillalsodestroyyourreputationandcloseallthefutureavenuesinthisfield. Ifyoucanfollowtheabovedosanddon'tsreligiouslytowriteabookreviewthenitisgoingtobemoreoriginalandinteresting. 70.Whichofthefollowingwordsisclosestinmeaningtotheunderlinedwordassimilateinparagraph2 A.stimulateB.fertilizeC.digestD.enhance 71.Thepurposeofwritingareviewonabookis. A.toshowyourunderstandingofthethoughtsandphilosophyoftheauthorbehindthebook B.toshowthatyoureallysticktoyourownopinionthoughyou'vereadthebook C.toarousereaders'curiositytoreadmorebooksonirrelevanttopics D.tosparkreaders'interestsinfindingthebookandreadingit 72.WhichofthefollowingisNOTtrueaboutthedos A.Beforewritingabookreviewyou'dbetterreaditthoroughlyormanytimes. B.Writedownyourliteraryanalysiswhenreadingthebook. C.Ifyouareinterestedincertainsituationinthebookyoucanhardlygiveittoomuchimportanceinyourreview. D.Agoodreviewconsistsofaproperintroductionandaconclusionaswellasanice﹣structuredsubjectbody. 73.Thefollowingstatementsaredon'tswhenwritingasummaryexcept. A.goingthroughreferencebooksorarticlesonyoursubjectbeforeyoustartpreparingyourarticle B.presentingallthedetaileddescriptionofthebookinthesummary C.thethoughtoractionofputtinganythingirrelevanttothebookintothesummary D.anyformsofcopyingthetextfromothers'writtenwork.
MustafaKemalAtatürkthefounderoftheTurkishRepublicdevotedApril23tothechildrenoftheWorldtostressthat61werethefutureofnation.Since1920Turkeyhasbeen62celebrateApril23asNationalSovereigntyandChildren'sDay. Children'sDayprovides63uniqueopportunitytocontributetointernationalpeaceandsolidarity团结.InDubaioverthelastfouryears64thehelpoftheConsulateGeneraloftheTurkishRepublicinDubaiwehaveorganizedfour65successcharitycelebrationstomarkApril23Children'sDay.ManyinternationalschoolsandperformancegroupsofdifferentcountriesinDubaitookpart.Wereachedanaudienceofnearly4000peopleandthe66participateofmorethan50differentchildrenperformancegroups67includemorethan800children. ThisyearIam68honortoannounceourfifthcelebrationhappeningtoday.Thesuccessofthiseventlieswiththededicatedvolunteerworkofallorganization69partneraswellasthegenerousdonationsofthesponsors.InordertosupportDubaiAutismCenter'sannualautism自我中心主义awarenesscampaign70isorganizedforthewholemonthofAprilithasbeendecidedtodonatetheincomeoftheeventtotheDubaiAutismCenterDAC
如图甲所示用钢丝绳将一个实心圆柱形混凝土构件从河里以0.05m/s的速度竖直向上匀速提起图乙是钢丝绳的拉力F随时间t变化的图象整个提起过程用时100s已知河水密度为1.0×103kg/m3混凝土的密度为2.8×103kg/m3钢铁的密度为7.9×103kg/m3g取10N/kg不计河水的阻力求 10﹣60s内混凝土构件在河水里上升的高度 2开始提起t＝0时混凝土构件上表面受到水的压强不计大气压 30﹣60s内钢丝绳拉力所做的功 4通过计算说明此构件的组成是纯混凝土还是混凝土中带有钢铁骨架
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下列物态变化属于凝固的是
小明利用图甲电路研究电流与电压的关系其中滑动变阻器最大阻值为500欧定值电阻R0阻值为10欧闭合开关当滑片从最右端慢慢向左移动发现最初电压表指针几乎不动直到接近左端时电压表指针才开始有所偏转继续左移指针偏转角度迅速变大即该滑动变阻器引起电压表示数发生明显变化的调节区域很小．本实验中要使滑片每移动一段距离都能引起电压表示数较为明显的变化应选择怎样的滑动变阻器小明用不同的电阻丝代替滑动变阻器利用图乙进行如下实验 ①取3条长度都为100厘米的粗细均匀电阻丝ABC阻值分别为1欧20欧400欧． ②将电阻丝A接入图乙电路闭合开关滑片P从最右端移到最左端记录电压表示数U随滑片移动长度x变化的相关数据多次测量． ③分别用电阻丝BC代替A重复步骤②． ④处理相关数据获得“电压表示数U随移动长度x变化的关系”如图丙． 1图甲实验中闭合开关当滑动变阻器滑片处于最左端时导线a与接线柱M处的连接意外断开此时 示数为零的电表是． 2分析图丙实验过程中电压表示数变化范围与电阻丝阻值的关系是． 3若利用图乙研究通过R0的电流与其两端电压的关系在ABC三条电阻丝中你认为选择哪一条电 阻丝最合适并说明理由．
Anexaminationisaveryimportantpartoflifewhichisusedtotestaperson'sability.Butasyouknowmanyofushas51andareafraidofit.Thoughtheyknowthatexamsaretherefortheirbenefittheystillhavealotoffearforit.Itisveryoftenwefindsuchpeople.Youwillfindsuchpeoplealittleanxiousandalittlestressedabouttheirexams.Manyatimesuchnervescanbe52andusefultoyouforothersit'snervewrecking. Toovercomethesenerveswegotsometipsforyou.Don'tgettooexcitedabouttheexamsandforthatdon'tdrinktoomuchofthecoffeeorteatocopeupwiththeexam53.Eatahealthyandproperdietanddon'tworryabouttheexamswhileeating.Stresscanbeharmfultoyou54sometimes.Itcancausealotofproblemsinyourbodywhichcanbeincreasedheartbeatandbreathsweatingpalmsnervousattitudestressedaboutexamsetc… Beforemovingtotheexaminationhallyoupreparethoroughlyabouttheexams.Forthatfirstlymakealistofwhatistobestudiedandthenmakeanoverlookforthat.Nowdivideeachsubjectintosomeeasysub﹣classes.Gothroughsome55questionpapersandstudyyourearliermistakesmadeinit.Makeaperfectscheduleforyourstudy.Overlookthe56usedforansweringthequestionsImeantheirpatternandstyleofwriting.Solvefewmorequestionpaperstoachieveapropertime57.Takesomequickbreaksinyourstudytimesothatyoucan58aninterestinyourstudy. Nowwhiletakingtheexamsjustrelaxcontrolyourbreathandbelieveinyourself.Don'tpanicandbeoptimistic.Trytoreduceyourstressandbehappy.Don't59atleastanhourbeforetheexamsjustgetyourselfcalmeddown.Keepyourfocusonthepaperandtellyourselfthatyouare60prepared.Forexamsreachbeforethetimeandtryto61inthesurroundings.Don'tlistentoanyoftheexamrumoursbeforeexams.Ifyoustillcan'tcontrolyourexamstressthengoforsomemeditationorhypnosis冥想或催眠. Yeshypnosisarealgoodand62waytocontrolyournervesandreduceyourstress.Itcanbeseenthataperson'swholelifechangescompletelyonlyfromfewofthe63instructions.Inhypnosisapersondirectlydealsyou'reyoursubconsciousmindinsteadofyourconsciousmind.Thefactisyoursubconsciousmindisalotmore64andfollowingthanyourconsciousmindsoinstructingcorrectlytoyoursubconsciousmindresultsterrificinreducingyournerves.Hypnosisreducesyourfearoffailureand65asenseofconfidenceinyou.Itdecreasesyournegativityandforcesyoutothinkpositivelyaboutyourexams.Youalsomultiplesyourpotential.YousimplyneedtogetyourhandsonthehypnosisforexaminationMP3.Thisiseasilydownloadableandyou'llbewellonyourpathtocombatingandovercomingthecondition. 51.A.interest B.panic C.faith D.concept 52.A.motivating B.suffering C.shocking D.spreading 53.A.participation B.motivation C.expansion D.tension 54.A.mentally B.physically C.continuously D.exhaustingly 55.A.previous B.patient C.personal D.current 56.A.preparations B.lessons C.schedules D.techniques 57.A.administration B.management C.limitation D.scale 58.A.entertain B.contain C.maintain D.complain 59.A.revise B.rush C.instruct D.discuss 60.A.normally B.informally C.comparatively D.completely 61.A.mix B.resolve C.adjust D.focus 62.A.instructive B.significant C.effective D.romantic 63.A.appropriate B.splendid C.original D.negative 64.A.impatient B.obedient C.ordinary D.desirable 65.A.enjoys B.shakes C.generates D.generalizes
DeltaCollegestartsStreetFair SanJoaquinDeltaCollegewillintroduceitsnewSummerStreetFairwhichrunsfromnoonto8p.meveryFridaystatingthisweekthroughAug.9inDelta'sL﹣lparkinglotnearPacificAvenueandMarchLane.ThefairgoeswithDelta'sweekendfleamarket. Thisweek'sfeaturedperformersareguitaristTravisMatsumotofromnoonto3p.m.andJulioandhisJazzTriofrom3to6p.m. LodeFarmersMarketopens TheAngelsCampCertifiedFarmersMarketbeginsitsyearlyrunfrom5p.m.toduskthisFridayinUticaParkindowntownAngelsCamp.Openingnightwillfeaturewinetastingfromaward﹣winningFourWindsCellarsandlivemusicbyguitaristNicholasLeffler.Visitorswillfindfreshlocallygrownproduceandspecialtyfoods.TherewillalsobebarbecueandCalifornia. Mexicanfusioncuisine. JoinRiverRaftingforagoodcause WhitewaterenthusiastscanparticipateinMokelumneRiveRaftingAdventuresonJune16inMokelumneHill.LocaloutfitterO.A.R.S.isdonatingitsservicestohelpwiththeevent.Departuresareat8a.m.noonor4p.m.Thetripshouldlastaboutthreehours. Thetripisappropriateforthose7andolderandtheabilitytoswimisnotrequired.Thecostis70perperson. Filmscenteronpaddlingwater Thefestivalisanannualcontestthatawardswinningfilmsthatfocusonpaddlinginriverslakesandoceansinavarietyoflocales.Ticketstothefilmfestivalare12inadvanceand$15atthedoorandarealsoavailableonlineatticketriver.com/event/7002﹣reel﹣paddling﹣film﹣festival. Theeveningalsoincludesadrawing.PrizesincludewhitewatertripsontheSouthForkoftheAmericanRiver. 1IfyouwanttogototheSummerStreetFair. A.youmustbeastudentfromDeltaCollege B.youcangothereontheafternoonofFriday C.youshouldlivenearthePacificAvenue D.youmustgiveaperformanceinthemarket 2Ifyouwanttoenjoythetastyfoodsyoucangoto. A.thenewSummerStreetFairofDeltaCollege B.LodeFarmersMarket C.MokelumneRiverRaftingAdventures D.thefilmfestivalcenteringonpaddlingwater 3Ifyouareinterestedinpaddlinginrivers. A.youcanknowalltheAmericanrivers B.youmusttryhardtogetmanyprizes C.youcangetticketsfromawebsite D.youmustkeepsilentintheevening.
为了解火箭升空过程中的相关运动状况兴趣小组制作了一模型火箭重为8牛不包含燃料发射后获取模型火箭的飞行高度与时间的关系如图所示． 1模型火箭燃料耗尽后仍能向上飞行一段距离这是因为模型火箭具有． 2图中标注的ABC三个位置中模型火箭的重力势能最小的是． 3模型火箭从最高点B下落到地面重力做功的功率是瓦．
将一蜡烛放在装有水的烧瓶前调整蜡烛和烧瓶至如图所示位置在墙壁上得到清晰的像．该像的性质是
RelaxduringajobinterviewFewpeopleactuallylikejobinterviewing.It'snerve﹣wracking摧残神经的tryingtoshowyourbestselftoaperfectstranger.36EThat'snoteasy.Buttherearesomewaystopullyourselftogetherandfeelmoreconfident.Preparesolidtalkingpoints.It'salwaysbesttoover﹣prepareforpossiblequestionsbynotonlyresearchingthecompanyandthepersoninterviewingyoubutalsobypreparinganswersandpracticingthoseresponses.Reviewtheskillsandexperiencesrequestedinthejobannouncementandhavetwotothreeexampleshowyouhavedemonstratedeachone.37GRemember:It'satwo﹣waystreet.Thisisconversationnotaninterrogation审问.38FRememberingthatthisisabackandforthdiscussionwhereyoucanandshouldaskquestionsaswellasanswerthemcanhelpyoufeelmorecomfortable.Justbreathe.39DYourbodywillrelaxlot.Youwanttoavoidupperchestbreathingasittendstojustmoveyoustressupwardtoyourface.40Aifyougointoaninterviewpickingapartyouroutfitorimperfectresponsesyou'reonlyhurtingyourchancesofcomingoffascalmandcollected.Turnoffyournegativeself﹣talkandthencreateadifferentself﹣talkmessagelikeIamheretosharethebestofmyabilityandthatisallIcanreallydo.Workitout.Puttinginsomegymtimethemorningofyourinterviewcanhelpyougetridofanynervoustension.Exercisehelpscalmyournervoussystemandtendstoreducetheintensityofphysicalmanifestations表现形式ofstresssuchasrestlessness.A.Stopthenegativethoughts.B.Putyourideaintopractice.C.Whenfacedwithanintervieweryoumaybenervous.D.Beforeyouwalkintoyourinterviewtakeafewdeepbreaths.E.You'retryingtoproveyou'retheoneforthejobandthatyoucanhandlestressfulsituations.F.Don'tforgetthatyou'renottheonlyonebeinginterviewed﹣you'realsointerviewingtheorganization.G.Thiswillstrengthenyouranswersandallowyoutoshowhowyourexperienceisrelevanttothejobororganizationforwhichyou'reinterviewing.
用伏安法测电阻时某电表的示数如图所示其示数为
如图所示空气中一束光经过s点斜射向竖直放置的平面镜经平面镜反射后射向一块玻璃砖的上表面并穿过玻璃砖从下表面射出请在图中画出该光路图不考虑玻璃砖的反射．
“珍爱生命注意安全”是中学生应具备的基本安全意识．下列关于安全用电的说法正确的是
用轻绳将小球系好后固定在天花板上做成一个摆如图所示小球在ac之间往返运动不计空气阻力对小球从a点向右摆动到c点的过程下列说法中正确的是
如图所示一个物体静止于光滑水平面上的o点在水平恒力F作用下开始向右加速运动依次经过abc三个点且ab之间和bc之间的距离相等F在ab段做功W1做功功率P1在bc段做功W2做功功率P2则有W1W2P1P2选填“＞”或“＝”或“＜”．
如图是浙江大学机器人研究团队研发的名为“绝影”的四足机器狗它能稳健地爬陡坡它的出现让我国四足机器人技术达到国际一流水平．机器狗质量为70千克每只脚与地面接触面积为50平方厘米． 1以行走的机器狗为参照物旁边的台阶是选填“静止”或“运动”的． 2机器狗行走时两脚着地它对地面的压强为多少帕 3机器狗爬上3米高的陡坡时克服自身重力做功为多少焦
眼球把来自外界物体的光会聚在视网膜上形成物体的选填“倒立实像”或“正立虚像”小李同学由于没有养成良好的用眼习惯成了近视眼进行矫正时应当戴用选填“凸透镜”或“凹透镜”制作的眼镜．
MauriceMountainisaretiredlawyerinWashingtonD.C.Hedevelopedaprototype原型机foradevicehecallsthePrestoEmergencyBoatLadder.Hisinventionisasmallfoldingladderthatattachestothesideofaboattohelppeoplewhofallintothewater.Mr.Mountainplanstomass﹣producehisboatladder. HecreatedhisinventionataworkshopcalledTechShop.Mr.MountainsaysIthinkitencouragesinnovation.Ithinkpeoplewhoprobablyhavehadideasrollingaroundinthebackoftheirmindsforyearsbuthaveneverhadtheopportunitytoactuallyputthemintoproductionorevenexperimentwiththemwouldfindthisplacewonderful.MembersofTechShopusehigh﹣techequipmenttodevelopandproduceideastheyhaveforinventions.IsabellaMusachiomanagesaTechShopinArlingtonVirginia.Shesaystheshophasmanydifferentkindsofequipment. TechShopisado﹣it﹣yourselfmakerspace.Sowhenyoucomeinwehaveallthesedifferentareasoftheshopandwehaveametalshopwoodshoplasers3Dprinterselectronics.Imeanwehavesomanydifferentareasandwehavealltheequipmentthatisavailahletoanybodyabovetheageof12. MembershipcostsforTechShopstartatjustover$100permonth.Membersareabletousecostlymachinesincluding3Dmodelingtoolsandlasercutters.IsabellaMusachiosaysTechShophelpsitsmembersbuildtheirdreams. Ourmottois‘buildyourdreamshere'becauseyoucanreallycomeinwithjustanideaandthenwiththehelpofTechShopmakethatleapfromanideatobuildingyourprojectoyourprototypeorevenyourbusiness. JimNewtonisthefounderofTechShop.HefirstintroducedtheideaforthetechnologyworkshopsatanartsandscienceseventcalledMakerFaireinSanMateoCaliforniain2006.HisideaattractedhundredsofmembersduringthateventNowthereareeightTechShoplocationsintheU.S.Inalltherearemorethan6000members.Twomore﹣TechShoplocationsinthecitiesofSt.LouisandLookAngeleswillbesetup. 28.TheinventionMr.Mountaininventedwillbeusedto. Asavethedrowningpeople B.helppeopleclimbtheladder C.maketheboatsafer D.lettheboatfloatsafely 29.WhatcanbeinferredfromwhatMr.MountainsaysinParagraph2. A.Peoplewithimaginationcanachievetheirdreams. B.TechShopcanhelpturnsomepeople'sideasintoreality. C.TechShopisaplacewherepeoplecanputforwardtheirnewideas. D.It'shardforpeopletoputtheirideasintopractice. 30.Fromthelastparagraphwecanknow. A.JimNewtonisaverygreatinvention B.peopledidn'tlikeTechShopatfirst C.TechShopwillbecomemoreandmorepopular D.TechShopgreetedwithbadreviewsin2006 31.WhatcanweknowaboutTechShopfromthepassage A.TechShopisfoundedbyMauriceMountain. B.TechShopputshigh﹣techdreamswithinreach. C.TechShopisanon﹣profitorganization. D.TechShopoffersitsmembersmoreideas.
Technologymeansdifferentthingstodifferentpeople.Aphysicianmightthinkoftechnologyasawaytoproduceanewmedicine.Toaspaceengineeritmightmeanmakingbetterrocketengines.Technologyissowidespreadthatitispartofeveryone'slife.OriginallythewordtechnologycomesfromtheGreekwordtechnewhichmeansart.Youmightthinkthatartmeansonlypaintingsorsculpture.ButtheGreeksbelievedanartistcouldmakeusefulproductsfromnaturalmaterialssuchastreesrocksandplants.WhatschoolsubjectsarerelatedtotechnologyThoughpeople'sopinionsvaryonwhatgroupsoftechnologyshouldbebrokendowntoyouwheninschoolmayhavethequestion:WhyshouldyoustudytechnologyThatquestioniseasytoanswer.Technologyisfunrewardingandexciting.Itisfunbecauseyougettoworkwithyourhands.Itisrewardingbecauseyougettoseetheresultsofyourwork.Eachdayitbringsnewideasandnewchallengeswhichmaketechnologyexciting.Studyingtechnologywillalsohelpyoudevelopyourproblem﹣solvingskills.Youcanlearntoidentifyaproblemandcomeupwithasolution.Youwillalsofindthattechnologyisrelatedtoothersubjectsthatyoustudyinschoolsuchas:MathematicsScienceSocialstudiesEnglishlanguageartsArtYoumightenjoyallofyourclassesmoreafteryoubegintoseetherelationshipsbetweentechnologyandothersubjects.DoyouknowwhattechnologicallyliteratemeansTechnologyisofteninthenews.Ajournalistmightreportonaparticularelectricalpowerplantafoodadditiveorasafetydeviceonanautomobile.Itisimportantthatyouunderstandtheimportanceoftechnology.Everydayinmanywaystechnologyaffectsthelivesofpeoplearoundtheworld.Forexampleautomobileairbagshavesavedmanylivesincollisions.Howevertheyinflatesoquicklythattheyhavecausedinjuryanddeathinsomecases.Asaresultthefederalgovernmentallowscarownerstoinstallanon/offswitchfortheairbags.DoyouthinkthegovernmentshouldletpeopledothisToanswerthisquestionyoufirstneedtoknowsomethingaboutthetechnologybeingdiscussed.DoesworkingonasmallenginesounddifficulttoyouWithabasicunderstandingoftechnologyitmightnotbeashardasyouthink.Beingtechnologicallyliteratemeansunderstandingtechnologyandfeelingcomfortablewithit.Sometimesthereisnoonecorrectanswertoaproblem.Youneedtothinkaboutandevaluateeachsituationandthenmakeadecision.Whenyoucandothisyouwillbetechnologicallyliterate.78.Whatcanthetitleofthefirstparagraphbetomatchtheothertwo.79.Youcanhavesincewhenstudyingtechnologyeverydayyouworkwithyourhandsseetheresultsofyourworkandhavenewideasandnewchallenges.80.Whyarecarownersallowedtoswitchofftheirairbags.81.Atechnologicalliteratecanbeapersonwho.Note:AnswerthequestionsorcompletethestatementsinNoMoreThanFifteenWords.
假定你是李华你所喜爱的GlobalMirror周报创刊五周年之际征集读者意见.请你依据以下内容给主编写封信内容主要包括: 1.说明你是该报的忠实读者 2.赞赏该报优点:1兼顾国内外新闻2介绍名人成功故事 3.提出建议:刊登指导英语学习的文章 注意:1.词数100左右开头语已为你写好; 2.可以适当增加细节以使行文连贯. DearEditorinChief Congratulationsonthe5thanniversaryofGlobalMirror! Sincerelyyours. LiHua
某工厂发货传输分拣线示意如图等间距排列的相同货物先被传送带匀速运送到工作台在工作台AB上匀速下滑时被扫描后滑至水平工作台BC最后在C点静止时被机械手臂取走进行分类．传送带与ABAB与BC都平滑连接AB与BC材料相同且长度均为1米空气阻力忽略不计． 1若货物对AB的压力小于对BC的压力则货物在AB上减小的机械能选填“大于”“等于”或“小于”在BC上减小的机械能． 2若机械手臂每隔3秒钟取走一件货物传送带运动的速度为0.8米/秒为防止货物的碰撞与堆积货物之 间的距离d至少为米．
在如图所示的测量电路中闭合开关S后电压表V1的示数是2.5VV2的示数是3.8V此时小灯泡L1的电阻为7.5Ω则关于该测量下列说法中正确的是
她的父母忙于工作因此她在年幼时就学会了照顾自己.age.
ThisafternoonIspokewithGovernorMalloyandFBIDirectorMueller.IofferedGovernorMalloymycondolences吊唁慰问onbehalfofthenationandmadeitclearthathewillhaveeverysingleresourcethatheneeds33investigatethisheinous令人发指的crimecareforthevictimscomforttheirfamilies. 34enduretoomanyofthesetragediesinthepastfewyears.AndeachtimeIlearnthenewsIreactnotasaPresidentbutasanybodyelsewould﹣asaparent.Andthatwasespeciallytruetoday.Iknowthere'snotaparentinAmericawhodoesn'tfeelthesameoverwhelminggriefthatIdo. Themajorityofthose35diedtodaywerechildren﹣beautifullittlekidsbetweentheagesof5and10yearsold.Theyhadtheirentirelivesaheadofthem﹣birthdaysgraduationsweddingskidsoftheirown.Amongthe36fallwerealsoteachers﹣menandwomenwhodevotedtheirlivesto37helpourchildrenfulfilltheirdreams. Soourheartsarebrokentoday﹣fortheparentsandgrandparentssistersandbrothersoftheselittlechildrenandforthefamiliesoftheadultswho38lose.Ourheartsarebrokenfortheparentsofthesurvivorsaswellforasblessedastheyaretohavetheirchildrenhometonighttheyknowthattheirchildren'sinnocencehasbeentornawayfromthemtooearlyandtherearenowordsthatwilleasetheirpain. Asacountrywehavebeenthroughthistoomanytimes.39it'sanelementaryschoolinNewtownorashoppingmallinOregonoratempleinWisconsinoramovietheaterinAuroraorastreetcornerinChicago﹣theseneighborhoodsareourneighborhoodsandthesechildrenareourchildren.Andwe'regoingtohavetocometogetherandtakemeaningfulactiontopreventmoretragedies40thisregardlessofthepolitics.
如图是上肢力量健身器示意图杠杆AB可绕O点在竖直平面内转动AB＝3BO配重的重力为120牛重力为500牛的健身者通过细绳在B点施加竖直向下的拉力为F1时杠杆在水平位置平衡配重对地面的压力为85牛在B点施加竖直向下的拉力为F2时杠杆仍在水平位置平衡配重对地面的压力为60牛．已知F1F2＝23杠杆AB和细绳的质量及所有摩擦均忽略不计下列说法正确的是
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