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在△ABC中,CA=CB,∠ACB=α.点P是平面内不与点A,C重合的任意一点.连接AP,将线段AP绕点P逆时针旋转α得到线段DP,连接AD,BD,CP. (1)观察猜想 如图1,当α=60°时...
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如图△ABC内接于⊙O.CA=CBCD∥AB且与OA的延长线交与点D.1判断CD与⊙O.的位置关系并
如图△ABC内接于⊙O.CA=CBCD∥AB且与OA的延长线交于点D.1判断CD与⊙O.的位置关系并
如图在△ABC中CD是AB边上的中线E.是CD的中点过点C.作AB的平行线交AE的延长线于点F.连接
已知如图1△ABC中BA=BCD是平面内不与A.B.C重合的任意一点∠ABC=∠DBEBD=BE.1
如图△ABC中∠ABC=∠ACB点D.在BC所在的直线上点E.在射线AC上且∠ADE=∠AED连接D
已知如图在RT△ABC中∠ACB=90°CA=CBO.是AB的中点点D.在BA的延长线上以D.为直角
如右图在△ABC中.CA=CB∠ACB=90°.AB=2.点D.为AB的中点以点D.为圆心作圆心角为
如图在△ABC中AC=BC∠ACB=90°点D.为△ABC内一点∠CAD=∠CBD=15°E.为AD
如图在Rt△ABC中∠ACB=90°CA=CB=2D是△ABC所在平面内一点以ABCD为顶点的四边
如图△ABC内接于⊙O.CA=CBCD∥AB且与OA的延长线交与点D.1判断CD与⊙O.的位置关系并
已知△ABC是等腰三角形CA=CB0°<∠ACB≤90°.点M在边AC上点N在边BC上点M点N不与所
如图等腰直角△ABC中CA=CB点E.为△ABC外一点CE=CA且CD平分∠ACB交AE于D.且∠C
如图在Rt△ABC中∠ACB=90°AC=6BC=8点D.为边CB上的一个动点点D.不与点B.重合过
如图Rt△ABC中∠ACB=90°∠A=50°将其折叠使点A.落在边CB上A.′处折痕为CD则∠A′
在△ABC中∠ACB=90°AB=8∠ABC=60°PC⊥平面ABCPC=4M.是AB上一个动点则P
如图在△ABC中∠ACB=90°AC=BCBE⊥CE于点E.AD⊥CE于点D.求证△BEC≌△CDA
Rt△ABC中∠C=90°CA=CB点P为△ABC所在平面内一点且点P与△ABC的任意两个顶点构成的
如图△ABC内接于⊙O.CA=CBCD∥AB且与OA的延长线交与点D.1判断CD与⊙O.的位置关系并
如图在△ABC中AC=BC∠ACB=90°点D.为△ABC内一点∠CAD=∠CBD=15°E.为AD
如右图在△ABC中.CA=CB∠ACB=90°.AB=2.点D.为AB的中点以点D.为圆心作圆心角为
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如图以△ABC的顶点B为圆心BA长为半径画弧交BC边于点D连接AD.若∠B=40°∠C=36°则∠DAC的大小为度.
如图∠1+∠2=180°∠3=104°则∠4的度数是
为参加全市中学生足球赛.某中学从全校学生中选拔22名足球运动员组建校足球队这22名运动员的年龄岁如下表所示该足球队队员的平均年龄是
15分Inmanyplacestodaychildrenstartprimaryschoolataroundtheageofsix.Howeverbecauseitismorelikelynowthatbothparentsworkchildrenhavelittleopportunity61stayintheirownhomeuptothatage.Insteadtheywillprobablygotoanurseryschoolwhentheyaremuch62young.Whilesomepeoplethinkthismaybedamagingtochildren's63developortochildren'srelationshipwiththeirparentsinfactthereareman64advantageofexperiencingschoolearly.Firstchildrenwilllearntointeractwithalotofdifferentpeople.Theyare65generalmoreconfidentandindependentthanthosewhoarenotusedtostrangersornewsituations.Suchchildrenmayfindtheirfirstdayatschoolatageofsixvery66frightenandthismayhaveanegativeeffectonhowtheylearn.Anotheradvantageofgoingtoschoolat67earlyageisthatchildrendevelopfastersocially.Theymakefriendsandlearnhowtogeton68otherchildrenoftheirage.Thisisnotoftenpossibleathomebecausetheyaretheonlychild69becausetheirbrothersorsistersareolderoryounger.SooverallIbelievethat70attendschoolfromayoungisgoodformostchildren.Theystillspendplentyoftimeathomewiththeirparentssotheycanbenefitfrombothenvironments.
下面摆放的图案从第2个起每一个都是前一个按顺时针方向旋转90°得到第2019个图案与第1个至第4个中的第个箭头方向相同填序号.
在下列长度的三条线段中不能组成三角形的是
1计算|﹣|+﹣12019+2﹣1﹣π﹣30 2解方程1﹣=
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Oneofthesecretsofsuccessliesinwehandletodaynotyesterdayortomorrow. A.what B.whether C.when D.how
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
下列四个运算中只有一个是正确的.这个正确运算的序号是 ①30+3﹣3=﹣3②﹣=③2a23=8a5④﹣a8÷a4=﹣a4
﹣Isthereareallifeexampletwonegativesmakeapositive? ﹣Sure. A.which B.where C.ofwhich D.forwhich
一组数据212532的众数是.
如图所示一次函数y=ax+bab为常数且a>0的图象经过点A41则不等式ax+b<1的解集为.
﹣Whatareyour? ﹣Doctormyarmhurtsandmybackhurts. A.properties B.responses C.symptoms D.reflections
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
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.
Thestatesmanspokesothatevenhisopponentswerewonoverbyhisarguments. A.disturbingly B.embarrassingly C.thrillingly D.convincingly
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
某品牌旗舰店平日将某商品按进价提高40%后标价在某次电商购物节中为促销该商品按标价8折销售售价为2240元则这种商品的进价是元.
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.
若点A﹣4y1B﹣2y2C2y3都在反比例函数y=﹣的图象上则y1y2y3的大小关系是
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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