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如图所示，当铁球摆到最高点A时，请画出它此时的受力示意图．
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如图所示均匀铁球保持静止细绳和竖直墙平行画出铁球受力的示意图.
按照题目要求作图．如图所示画出小球摆到最高点时所受到的重力和拉力的示意图．
如图所示是小丽同学荡秋千运动到右侧最高点时的情景图中的黑点表示小丽同学请画出此时小丽所受力的示意图．
如图所示的A.物体处于静止状态请画出A.在水平方向的受力示意图
如图所示用手把一个小球竖直向上抛出空气阻力不计当小球竖直向上运动的速度为v时请画出此时小球的受力示意
按照题目要求作图．如图所示画出小球摆到最高点时所受到的重力和拉力的示意图．
⑴如图所示放在水平桌面上的茶壶处于静止状态请画出茶壶受力示意图⑵如图是滑轮组要求最小的力匀速提升重物
如图所示画出小球摆到最高点时所受到的重力和拉力的示意图．
如图所示将一个小球放在竖直放置的弹簧上小球静止不动请画出此时小球的受力示意图.
如图所示在探究声音是由物体振动产生的实验中将音叉紧靠是线下的小球敲击音叉发现小球被弹开后并到达最高点
如图所示把一个铁锁用绳子悬挂起来将锁拉到一定的高度后放手铁锁来回摆动．请画出铁锁摆到最高点时受到的
如图12所示在探究声音是由物体振动产生的实验中将音叉紧靠是线下的小球敲击音叉发现小球被弹开后并到达最
如图所示把一个铁锁用绳子悬挂起来将锁拉到一定的高度后放手铁锁来回摆动.请画出铁锁摆到最高点时受到的重
如图所示一个足球静止在水平地面上请画出它受力的示意图
一根细长绳的下端系一金属小球上端固定制成一个摆把小球拉离竖直位置松手让它摆动起来如图所示画出摆球处
如图所示画出小球摆到最高点时所受到的重力和拉力的示意图.
10·乐山如图所示空心铁球悬浮在水中请作出铁球所受力的示意图
如图12所示在探究声音是由物体振动产生的实验中将音叉紧靠是线下的小球敲击音叉发现小球被弹开后并到达最
用细线悬挂的小球摆到最高点时如图甲所示试画出小球受到重力和拉力的示意图
将一实心铁球投入如图所示盛有水银的容器中请在图14-8中画出铁球静止后的大致位置并画出铁球受力示意图
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电子政务数字经济智慧社会…一场数字革命正在神州大地激荡．在第二届数字中国建设峰会召开之际某校举行了第二届“掌握新技术走进数时代”信息技术应用大赛将该校八年级参加竞赛的学生成绩统计后绘制成如下统计图表不完整 “掌握新技术走进数时代”信息技术应用大赛成绩频数分布统计表 请观察上面的图表解答下列问题 1统计表中m＝统计图中n＝D组的圆心角是度． 2D组的4名学生中有2名男生和2名女生．从D组随机抽取2名学生参加5G体验活动请你画出树状图或用列表法求 ①恰好1名男生和1名女生被抽取参加5G体验活动的概率 ②至少1名女生被抽取参加5G体验活动的概率．
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6分PositionHRManagerweneedoneWorkPlaceChongqingregionJobDescriptioninDetailMainResponsibilities1.Compensation&BenefitsManagement2.StaffRecruitmentforRetailandOffice3.Staff﹣TrainingandDevelopment4.EmployeeRelationshipJobActivities1.HRbudget&control2.Maintainandupdatesalary/C&BSystem3.Workwithlinemanagerstodefinetherecruitmentneeds4.Planandexecuteinterviewprocessincludingcandidateinterviewingreferencecheckingandso5.Individualizestaffdevelopmentplan6.EmployeerelationshipmanagementRequirementsExperience1.Atleast3﹣5yearsofhumanresourcesoperationalexperience.2.Astrongcommunicatorwitheffectivelisteningpresentationandinfluencingskills.3.Abilitytoquicklyunderstandthebusinessstrategyfinancialenvironmentandteamdynamicsandapplytheknowledgeinselectinganddevelopingtalent.Talent1.Ateamplaywithstronginterpersonalskills.2.ProficientinEnglishandChinese.PleasesendusyourresumeinbothEnglishandChinesewithacopyofyouracademicdiplomaandIDcardarecentphotoandexpectedsalaryviafax/mail/e﹣mail.21.What‘sthepurposeofwritingthispassage?A.Toprovidesomesuggestionsonhowtoapplyforajob.B.Toprovidesomedetailedinformationaboutajoboffer.C.Toprovidesomeguidelinesonhowtofinda.newjob.D.Toprovidesomespecificsondecidingwhethertoacceptajobofferornot.22.Ifyouareinterestedinthejobyoumustsendthefollowingthingsexcept.A.acopyofyouracademicdiploma.B.arecentphotoC.acopyofyourIDcardD.yourresumeonlyinEnglish23.Ifyouareemployedwhichofthefollowingarerequiredforyoutodo?①organizesometrainingwhichcanimprovestaffqualities②organizepartiesregularlyforthestaff③recruitstaffforsomedepartments④harmonizetherelationshipbetweenemployees⑤paythestaffsalarieseverymonthA.①②④B.①③④C.②③⑤D.③④⑤
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某地区在所有中学开展老师我想对你说心灵信箱活动为师生之间的沟通增设了一个书面交流的渠道．为了解两年来活动开展的情况某课题组从全地区随机抽取部分中学生进行问卷调查．对“两年来你通过心灵信箱给老师总共投递过封信”这一调查项设有四个回答选项选项A没有投过选项B一封选项C两封选项D三封及以上．根据接受问卷调查学生的回答统计出各选项的人数以及所占百分比分别绘制成如下条形统计图和扇形统计图 1此次抽样调查了名学生条形统计图中m＝n＝ 2请将条形统计图补全 3接受问卷调查的学生在活动中投出的信件总数至少有封 4全地区中学生共有110000名由此次调查估算在此项活动中全地区给老师投过信件的学生约有多少名
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10分HowtoreviseforatestStudyingfortestsmaybeoneofthemostdifficultpartsofschool.36Ifyoufeeldiscouragedaboutanapproachingtestandneedsomedirectionsforpreparingyourselfconsiderusingthefollowingsuggestionstohelpyouout.Aimforemosttounderstandtheconcepts.Keeptheimportantpointsinmindandignoreunnecessaryinformation.37Askforhelp.Whentheneedarisesitisbesttoreceivehelpfromtheothers.38Youcouldalsoaskhim/herforasetofquestionsandanswersthatcouldhelpyoumemorizetheinformation.Youcouldalsoaskafamilymemberorafriendforhelp.Practiceineverydaylife.Fitreviewingintoeverydaylifebystickingupnoteswithsentencesyouneedtorememberforthetestwrittenuponthem.39YoucouldpossiblyputoneonthebathroommirroroneatthetableandanotherbytheTV.Thisisoptionalbuthighlyrecommended.40Findouthowmuchyouremembercertainthingsandwhat'smissing.Decidewhatyoudidwellinandwhatyoudidnotsowellin.Thismayboostyourchancesofgettingmoremarksintheassessmentandmayalsohelpyourememberfornexttime.Forinstanceifyouarestrugglingonmathsproblemsbasedongeometrythenputthisdownassomethingthatyouneedtoreviewmorethanthesubjectsyouaregoodat.Reviewoftenbutlittle.Donotpushyourselfandtryreviewingeverythinginoneday.Practicetakestimeandifyourushyouwon'trememberanything.A.Gothroughwhatyouhavebeenlearning.B.Markyourpracticetests.C.Aslongasyouremainfocusedonthemaintopicsyouwillbeabletodowellonthetest.D.Howevereventheworsttestperformancecouldbeturnedaroundintoasuccessfulattempt.E.Itcanbedifficulttorememberthematerialandunderstandwhichpointstostudy.F.Youwillnoticethemeverydayandreviewingwon'tseemtobeboringordull.G.Askyourteachertosummarizethetopicwithalltheimportantpoints.
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WhenAmericansoldiersreturnhomefromwarwithdisabilitiestheyoftensuffertwice﹣firstfromtheircombatinjuriesnextfromthehumiliation羞辱ofgovernmentdependency.Woundedveterans老兵learntheyhavetwobasicchoicesTheycanreceivealmost$3000amonthindisabilitybenefitsalongwithmedicalcareandaccesstoothervariouswelfareprogramsortheycantrytofindajob.Especiallyinthiseconomyit'snowonderthatmanyfindthatfirstoptionhardtoturndown.MarkDuggananeconomicsprofessoratStanfordUniversityreportsthatenrollmentinU.S.veterans'disabilityprogramsrosefrom2.3millionin2001to3.9millionin2014.Thepercentageofveteransreceivingbenefitsdoubledfrom8.9%in2001to18%in2014.Disabilityservicesforveteransnowconsume$59billion.Inthe1980sand1990smaleveteransweremorelikelytobeinthelaborforcethannonveterans.Butsince2000thathaschangeddramatically.Nowthereisa4%gapbetweenveteranandnonveteranlaborparticipationwithveteranparticipationlower.NavySEALEricGreitensfounderofTheMissionContinuesexplainshowsoldierswhoservedtheircountryaretransformedintowelfarereceiverswholiveofftheircountry.'Whenveteranscomehomefromwartheyaregoingthroughatremendouschangeinidentity'hesays.'ThentheUnitedStatesDepartmentofVeteransAffairsandothersencouragethemtoviewthemselvesasdisabled.'BythetimetheycometoGreitens'non﹣profitorganization'Wemeetanumberofveteranswhoseethemselvesascharitycasesandarenotsureanymorewhattheyhavetocontribute.'Therearealsomorepracticalfactorsdrivingthedisabilityboom.Oneistheexpansionofqualificationcriteria.In2000forinstancetype2diabeteswasaddedasadisabilitybecauseofevidencelinkingexposuretoAgentOrangewiththeonsetofthedisease.Heartdiseasehasalsobeenaddedtothelist.Anotherpossiblefactoristhatyoungerveteransseemlessagainstwelfarethantheirparents'generation.Veteranswhohaveservedsincethe1990saremuchmorelikelytosignupfordisabilitythantheiroldercounterparts;1in4youngerveteransisondisabilityversusjust1in7ofthoseoverage54.Weshouldn'tgobacktothebadolddayswhenveteranswereafraidtoadmitweakness.ButLt.Col.DanielGadeisoneofmanyveteranswhothinkourdisabilitysystemisharmfulpsychologicallytoformersoldiers.Gadelosthislegincombatin2005andnowteachesatWestPoint.HerecentlygaveatalktodisabledveteransatFt.Carsoninwhichheurgedthemtorejointheworkforce.'Peoplewhostayhomebecausetheyaregettingpaidenoughtogetbyondisabilityareworseoff'hewarned.'Theyaremorelikelytoabusedrugsandalcohol.Theyaremorelikelytolivealone.'Whatawasteofhumanpotentialespeciallysincemostveteransondisabilitystillhavetheirprimeworkingyearsaheadofthemwhenthey'redischarged遣退.Wecouldsolvethisproblembychangingthewayweview﹣andlabel﹣veteranswithdisabilities.AsGadenotedinarecentarticle'Veteransshouldbeviewedasresourcesnotasdamagedgoods.'Herecommendedthat'effortstohelpveteransshouldbeginbyrecognizingtheirabilitiesratherthanfocusingonlyontheirdisabilitiesandshouldservetheultimateaimofmovingwoundedsoldierstorealself﹣sufficiency.'OnamorepracticalnotetheUnitedStatesDepartmentofVeteransAffairscouldreallocateresourcestospendmoreonjobtrainingandlessondisability.Currentplacementprogramsaresadlyinadequate.Wearegoodatsendingsoldiersofftowar.Yetwhentheseyoungmenandwomenreturnhometheyareessentiallytold'We'llgiveyouenoughforareasonablycomfortablelifebutwewon'thelpyoufindajob.'Itisunreasonablethatwearecondemningthousandsofyoungveteranswhoservedtheircountrytolifeonthedole救济金ratherthanenablingthemtoreentertheworkforcewiththenecessaryaccommodations.35.Whatdomoreandmoredisabledveteransappeartodonowadays?A.Dependonthegovernmentforaliving.B.Betreatedbadlyinmostworkplaces.C.Askthegovernmentformoredole.D.Spendmoretimeonjobhunting.36.HowdoesMarkDugganprovehisopinioninthepassage?A.Bylistingfigures.B.Bygivingexamples.C.Byperformingexperiments.D.Byanalyzingcauseandeffect.37.Whatdidveteransusetodointhe1980sand1990s?A.Refusetofindjobs.B.Beamainlaborresource.C.Havemuchtroublefindingjobs.D.Receivemanydisabilitybenefits.38.Oneofthereasonswhytherearemoredisabledveteransisthat.A.damagefromthewarisgreaterthaneverB.veteranshavesufferedmuchmorethaneverC.thescaleofdisabilitieshasbeenbroadenedD.olderveteransaren'tafraidtoadmittheirdisability39.InGade'sopiniontheveteranswhoreceivewelfarefromthegovernmenttendto.A.savemoretroubleforthegovernmentB.leadamiserableandunhappylifeC.increasinglydependonthegovernmentD.sufferthehumiliationoftheircombatinjuries40.Whatistheauthor'sattitudetowardcurrentplacementprograms?A.Reasonable.B.Positive.C.Neutral.D.Critical.
ChuckBerryfatherofrockandrollstartedsinginginchurchwhenhewassixyearsoldandhisinterestinmusichim. A.stuckwith B.respondedwith C.appealedto D.cateredto
8分Chocolateisthe'foodofthegods''asweettreatformanyacrosstheworldandanincreasinglypopularindustryworthanestimated﹩110billionayear.Butchocolateloversyourbelovedsnackmayhavejustbeensavedbyanothersweettreatmangoes芒果.Scientistsmayhavefoundawaytosolveapossiblycomingshortageofcocoawhichcouldaffectfuturechocolateproductionbyusingmangoesinplaceofcocoatomakechocolateaccordingtoastudy.'Wildmangoisoneoftheso﹣calledCinderella灰姑娘specieswhoserealvalueisunrealized''saysAkhterthestudy'sseniorauthor.Globalcocoaproductionhasgonedowninrecentyears﹣duetoahandfuloffactorsincludingchangesinclimateandcropfailure﹣whilethedemandforcocoahasbeenontherise.Cocoaproducersinthepastalsohavebeenaccusedofunfairlaborpracticesincludingemployingchildlaborersandunderpayingfarmers.Wildmangobuttermaybechemicallyandphysicallysimilarenoughtococoabuttertoactasareplacementwhichmakesresearchersandfoodproducersexcitedandhopeful.Thestudy'sauthorsalsobelievethepotentialbusinessbenefitsofthefruitcouldbeaboontoprotectionefforts.'Goingbeyondtheusetoindustrywildfruitslikemangoesareanimportantsourceoffoodmedicineandincomeforruralpeoplebutareindeclineduetofactorssuchasdeforestation''saidMoragMcDonaldofBangorUniversityanotherofthestudy'sauthors.Addingvaluetounderusedproductsthroughprocessingforproductsthathavemarketvaluecanbringaboutavaluablemotivationfortheconservationofsuchspeciesandhelptobringaboutalternativeincomesourcesandreducehouseholdpoverty.28.WhyisthemangocalledCinderellaspecies?A.Itoftenappearsinfairytales.B.Itisespeciallysuitableforgirls.C.Itsimportancefailstoberecognized.D.Itlookscommonbutisverypopular.29.WhatisstressedinParagraph2?A.Thehardlifeofcocoafarmers.B.Thegreatdemandforchocolate.C.Thereasonsforchocolate'spopularity.D.Thereasonsforreplacingcocoawithmangoes.30.Whatmakesmangoesareplacementforcocoa?A.Similaroutput.B.Similarnutritionalvalue.C.Similargrowthconditions.D.Similarprocessingmethod.31.Theunderlinedword'boon'inParagraph3canbestbereplacedby.A.disagreementB.giftC.challengeD.barrier.
Myfamilywasveryconcernedformysisterandunderstandablyso.HelenwasonaflightfromLosAngelestoPhoenix.Althoughtheflightwasshortitprovided11timeforhertogettoknowtheMorrisonsanArizonacoupleseatedinherrow.Theplanewasonlyintheairforacoupleofminutes12thewifeMarciefellasleepleavingherhusbandDanielandmysistersittingnexttoeachotherinsilence.Maybeitwasafeelingof13thatsparkeditormaybeitwastheneedto14.WhateverthecasewithinminutesDanielbeganto15thecouple'sstory.HetoldmysisterhowheandMarciehadflowntoLosAngelesthatmorningtomeetwithadoctorof16medicineabouttreatingMarcieonly35forherstage4breastcancer.17thediagnosisofthedoctorsinPhoenixhadgivenMarcieonlyafewmonthstolivethecouplehaddecidedto18otherformsoftreatment.Althoughtheybothfelt19aboutwhathadbeendescribedtothemthatdaytheywerealsodismayedtolearnthatthealternativetreatment20a$34000pricetagandwouldnotbecoveredby21.Additionallythey'dhavetopayforaplaceto22whileMarcieunderwenttreatment.WhenitcametimetodeplaneDaniel23Marcieandsinceshewasunabletowalkrequestedawheelchair.Itwaswhilemysisterwaswaitingwiththemforthechairthatshemadethe24thattheycouldstaywithherduringtheirtripstoLosAngeles.HelenreceivedacallfromDanielthefollowingweeksayingthatheandMarciehad25itoverandtheywouldliketotakeheruponher26offer.TheyarrivedthefollowingWednesdayandleftonSunday.Andthis27continuedforseveralmonths.What28﹣whatplan﹣hadbroughtthethreeofthemtogetherandthencompelledhertoinvitethemintoherhome?Whateverthecasesheknewthatshehaddoneexactlyasshewassupposedto.Iguessitwouldbean29tosaythatmyfamily'sfeelingsofconcernchangedtofeelingsof30!WeareallsoproudofourHelen!11.A.regular B.spare C.ample D.available12.A.when B.after C.once D.until13.A.boredom B.freedom C.awkwardness D.tiredness14.A.unpack B.unload C.survive D.cooperate15.A.report B.read C.retell D.relate16.A.herbal B.internal C.preventive D.alternative17.A.Since B.Unless C.Before D.Provided18.A.combine B.compare C.pursue D.tolerate19.A.sure B.good C.empty D.sorry20.A.published B.lost C.released D.carried21.A.insurance B.allowance C.donation D.pension22.A.visit B.go C.stay D.enjoy23.A.hugged B.woke C.kissed D.followed24.A.decision B.assumption C.excuse D.compromise25.A.passed B.got C.took D.talked26.A.final B.acceptable C.generous D.conditional27.A.arrangement B.belief C.bargain D.deal28.A.relationship B.force C.cost D.subject29.A.shame B.taboo C.embarrassment D.understatement30.A.astonishment B.achievement C.admiration D.adaptation
某中学数学兴趣小组在一次课外学习与探究中遇到一些新的数学符号他们将其中某些材料摘录如下 对于三个实数abc用M{abc}表示这三个数的平均数用min{abc}表示这三个数中最小的数例如M{129}＝＝4min{12﹣3}＝﹣3min311}＝1．请结合上述材料解决下列问题 1①M{﹣2222﹣22}＝ ②min{sin30°cos60°tan45°}＝ 2若min3﹣2x1+3x﹣5}＝﹣5则x的取值范围为 3若M{﹣2xx23}＝2求x的值 4如果M{21+x2x}＝min{21+x2x}求x的值．
8分Wanttohelpyourlittlekidsdevelopbetterphysicallyandmentally?MyGymhassomeprogramsforyou.LittleBundles6weeks﹣6monthsOuryoungestMyGymstudentsbegintheirfirstvisualaudile听觉的andspatialexplorationwhiletheyandtheirparentsareguidedthroughtheprogram.Theprogramisdesignedtocarefullyintroducemusicandmovementinvariousfunways.Babyexercisessongsdancesbaby﹣saferidesuniqueswingsandmanyotherParent&Meadventuresawaitthebaby﹣parentteam.Eachweekparentsparticipateinadialogueabouttheirbaby'sdevelopment.TinyTykes7﹣13monthsAsthebabiesgainhandarmandbodycontrolandbecomemobileweintroducenewactivities.Ourbabiesandtheirparentsareledthroughavarietyofbeginningstretches伸展exercisesbabysongsanddancesbaby﹣saferidesandadventuresandbalanceskillsduringthisprogram.Arelationshiptomovementandphysicalactivitybeginstodevelopasourbabiesdiscovertheirnaturalabilitiesandimprovetheirphysicalandcognitive认知的development.Waddlers14﹣22monthsAtthisageakid'slevelofindependentmobilitytypicallyprogressfromaggressivecrawlingtorunning.Additionalmotorskillsdevelopingduringthisstageincludekickingaballbuildingablocktowerridingatricycleandwalkingupstairs.Ourhighlytrainedinstructorsshowerthechildrenwithloveandcaringastheyguideourkidsinearlysocialskillsthroughinteractivesongswell﹣designeddancesage﹣specificpuppet木偶showsspecialridesandavarietyofswingsandotheroriginalactivities.Gymsters23months﹣2l/2yearsDuringthisprogramtheyoungstersarehappyastheysingdanceswingplaygamestaketurnsonspecialridesandhave'SurpriseTime'.Ourkidsfeelgreataboutthemselvesastheylearngymnasticsinaconstantlychangingprogramwithfreshactivitiesandnewequipmenteachweek.21.WhatdoesLittleBundlesrequireparentstodoonceaweek?A.Takeanadventuroustrip.B.Designaprogramforkids.C.Talkabouttheirkid'sgrowth.D.Sharelearningskillswithothers.22.Inwhichprogramcanbabieswatchpuppetshows?A.LittleBundles.B.TinyTykes.C.Waddlers.D.Gymsters.23.WhatcanwelearnaboutGymsters?A.Itisn'tasfunastheotherthreeprograms.B.Kidscandonewactivitieseveryweek.C.Itrequiresplentyofparents'participation.D.Theactivitiesitinvolvesremainunknown.24.Whatisthepurposeofthistext?A.ToadvertisesomeprogramsatMyGym.B.Toshowwhatactivitieskidsareinterestedin.C.Totellparentshowtohelptheirkidsdevelop.D.ToencouragereaderstodoexerciseatMyGym.
15分MyJourneytoLhasaAttheageoffifty﹣fiveAlexandraDavid﹣NeelwalkedforfourmonthsacrossthehighmountainsoftheHimalayas61littlefoodormoney.She62willingsufferedthetoughtravel63conditiontoreachhergoalandfinallyin1924becamethefirstEuropeanwomanevertoenterLhasathecapitalofTibet.Lhasaisverydifficulttogettoandsomepeoplecallit'TheRoofofTheWorld'.'MyJourneytoLhasa'isthetrueaccountofDavid﹣Neel'sextraordinaryjourney64isevenmoreremarkablebecauseatthattimeforeignersespeciallyforeignwomen65forbidtoenterLhasa.Tohide66shesheworetheclothesofabeggar.Herbookisagood67introducetoTibet.Readerswillloveherdescriptionsofthepeopleshemetalongtheway.David﹣Neelwas68fluencyinTibetandialectsandknewtheculturetheresoitwaseasyforhertogettoknowthepeople.'MyJourneytoLhasa'69givearealfeelingforTibetandthepeoplethere.ItisagreatbookifyouwanttovisitTibetorifyoujustlikeagoodstory.Thisbookfirst70publishin1927iswellworthreading.
如图是由7个相同的小正方体组合而成的几何体．这个几何体的左视图是
8分Ifyouarereadingthisrightnowyouaretakingpartinthewonderofliteracy.Becauseofprintedwordspeoplecanrelayinformationacrossbothtimeandspace.Muchofthecreditforthisphenomenoncanbeattributedtooneman.BorninMainzJohannesGutenbergstudiedattheUniversityofErfurtin1418andspentmuchofhisyoungadultlifepracticingtheprofessionofgoldsmithing.In1439Gutenbergborrowedmoneyfrominvestorsbutfoundhimselfinfinancialtrouble.In1439thecityinwhichGutenberglivedwasplanningtoexhibitalargecollectionofsomerelicswhichwasexpectedtobringmanyvisitorstothetown.Gutenbergcreatedmanymetalmirrorswhichweretobesoldtothevisitors.Themirrorsprobablywouldhavesoldwellbutduetoseverefloodingtheeventwasdelayedbyoneyear.TheinvestorsdemandedthatGutenbergreturntheirinvestmentsbuthehadalreadyspentthemoneyonthemirrors.InordertosatisfytheinvestorsGutenbergdecidedtosharehissecretwiththem.Thissecretwouldforeverchangetheworldallofhistoryandeventheprocessofkeepinghistory.Hehadcreatedthemechanicalprintingpresswithmovabletype.Gutenberg'sbrilliantideawouldsoonchangetheworldbuthewasinfinancialtroubleonceagainandwasaccusedofmismanagingmoney.ThecourtsruledagainstGutenbergandGutenberglost.theshophehadcreated.BeforethespreadofGutenbergsidealiteraturewasprimarilyhandwrittenandthusbookswereextremelyrareandvaluable.Therewaslittlereasonforcommonpeopletolearntoreadorwrite.Gutenberg'sinventionwouldchangeallofthat.Hisprintingpressallowedliteraturetobeproducedonamassscale.Hismovablemetaltypecouldbearrangedoncetoformapageandhispresscouldprintthepageagainandagain.ThoughGutenberghadfailedasabusinessmanthetechnologiesthathehadcreatedspreadacrossEuroperapidly.AstheseprintingtechnologiesandtechniquesspreadnewsandbooksbegantotravelacrossEuropemuchfasterthanpreviouslypossible.Theworldhasnotbeenthesamesince.28.WhichofthefollowingcanreplacetheunderlinedwordinParagraphone?A.referredB.devotedC.exposedD.owed29.WhydidGutenberg'splantosellmirrorsfail?A.Themirrorswerelesspopularthanhehadexpected.B.Floodingdelayedtheeventforanentireyear.C.Toomanyotherpeoplehadthesameidea.D.Newlyinventedglassmirrorsmadehismetalmirrorsold﹣fashioned.30.Whichofthefollowingisbestsupportedbyevidencefromthetext?A.Gutenberg'sideawasatremendoussuccessthatmadehimincrediblywealthy.B.Gutenberg'sideadidn'tbecomepopularinhislifetimebutgrewverypopularafterhisdeath.C.Gutenbergsideadidnotmakehimrichbutspreadveryquickly.D.Gutenbergsideadidnotbecomepopularrightawaybutmadehimincrediblyrichovertime.31.Whichofthefollowingtitlesbestexpressesthemainideaofthistext?A.InvestingWiselyTurningYourGoodIdeasintoMoneyB.HowtoMakeBooksUsingtheGutenbergMethodC.TheCityofMainzLifeinMedievalGermanyD.GutenbergAManWhoChangedtheWorld.
小明用0﹣9中的数字给手机设置了六位开机密码但他把最后一位数字忘记了小明只输入一次密码就能打开手机的概率是．
将在同一平面内如图放置的两块三角板绕公共顶点A旋转连接BCDE．探究S△ABC与S△ADC的比是否为定值． 1两块三角板是完全相同的等腰直角三角板时S△ABCS△ADE是否为定值如果是求出此定值如果不是说明理由．图① 2一块是等腰直角三角板另一块是含有30°角的直角三角板时S△ABCS△ADE是否为定值如果是求出此定值如果不是说明理由．图② 3两块三角板中∠BAE+∠CAD＝180°AB＝aAE＝bAC＝mAD＝nabmn为常数S△ABCS△ADE是否为定值如果是用含abmn的式子表示此定值直接写出结论不写推理过程如果不是说明理由．图③
10分Anyonewhokeepsagardenknowsthatmostplantsbendtowardsthesuntocatchasmuchsunlightastheycan.Thisiscalled'solartracking'.36Ifyouobserveasunflowerintheearlymorningyouwillfinditturningitsfaceeastward;atsunsetontheotherhanditsfacewillturntowardsthewest.37Inotherwordswhathappensifyoutakeasunfloweroutofthegardenbedandkeepitinacompletelydarkroom?Surprisinglythesunflowerwillcontinueitssolartrackingwithoutsunlight.Itwillbendjustasitdidoutsideeastwardatsunriseandwestwardatsunsetevenifthereisnotasinglerayoflightinsidethedarkroom.Thisisaclassicexampleofwhatscientistscallacircadianrhythm昼夜节律.Whatdoesitmean?38It'snotdirectedbytheenvironment.Sunflowersdofollowthesunbuttheydon'tjust'seek'sunlight.39Althoughsunflowersdon'tbendwithanypurposeinmindsomescientiststhinktheyhaveevolvedtheirsolartrackingsystemovermillionsofyears.Accordingtothistheorytheevolutionhelpssunflowerscatchlightmoreeffectivelyandtheonesthatcatchlightbestaremostlikelytosurvive.Asaresultofthisnaturalselectionwenowhavesunflowersthatbendautomatically.40Afteracertainstagesunflowersstopfollowingthesunandonlyfaceeast.A.Sunflowersareawell﹣knownexampleofthis.B.Sunflowersarealsoanimportantsourceoffood.C.Wildsunflowersseenonroadsidesdontfollowthesun.D.Itisadailycycleofbehaviorthatisinsideoflivingthings.E.Howeverthatonlyhappenswhensunflowersareyoungplants.F.Butwhatifthere'snosunforthesunflowertoguideitssolartracking?G.Thisisclearfromthefactthatsunflowersindarknessbendjustaswell.
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