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已知:如图,点A、B分别是∠MON的边OM、ON上两点,OC平分∠MON,在∠CON的内部取一点P(点A、P、B三点不在同一直线上),连接PA、PB.(1)探索∠APB与∠MON、∠PAO、∠PBO...
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已知点AB分别在锐角∠MON的边OMON上则经过点AOB能作圆的个数是.
如图点O.为正六边形ABCDEF的中心点M.为AF中点以点O.为圆心以OM的长为半径画弧得到扇形MO
如图∠MON=90º长方形ABCD的顶点B.C.分别在边OMON上当B.在边OM上运动时C.随之在边
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已知∠MON=40°OE平分∠MON点A.B.C.分别是射线OMOEON上的动点AB.C.不与点O.
如图123m中MN分别是⊙O的内接正△ABC正方形ABCD正五边形ABCDE正n边形的边ABBC上的
已知∠MON=80°OE平分∠MON点A.B.C.分别是射线OMOEON上的动点A.B.C.不与点O
如图l23nM.N.分别是⊙O.的内接正三角形ABC正方形ABCD正五边形ABCDE正n边形ABCD
如图1点P为∠MON的平分线上一点以P为顶点的角的两边分别与射线OMON交于AB两点如果∠APB绕
如图点M.N.分别是正五边形ABCDE的两边ABBC上的点.且AM=BN点O.是正五边形的中心则∠M
1如图①M.N.分别是⊙O.的内接正△ABC的边ABBC上的点且BM=CN连接OMON求∠MON的度
已知如图①∠MON=60°点A.B.为射线OMON上的动点点A.B.不与点O.重合且AB=在∠MON
已知∠MON用三角尺按下列方法画图在∠MON的两边OMON上分别取OA=OB再分别过点A.B.作ON
如图1P.为∠MON平分线OC上一点以P.为顶点的∠APB两边分别与射线OM和ON交于A.B.两点如
如图已知∠MON的边OM上有两点A.B.边ON上有两点C.D.且AB=CDP.为∠MON的平分线上一
如图1点P为∠MON的平分线上一点以P为顶点的角的两边分别与射线OMON交于AB两点如果∠APB绕
如图1点P.为∠MON的平分线上一点以P.为顶点的角的两边分别与射线OMON交于A.B.两点如果∠A
如图1将一副三角板的两个锐角顶点放到一块∠AOB=45°∠COD=30°OMON分别是∠AOC∠BO
如图1P.为∠MON平分线OC上一点以P.为顶点的∠APB两边分别与射线OM和ON交于A.B.两点如
1如图①M.N.分别是⊙O.的内接正△ABC的边ABBC上的点且BM=CN连接OMON求∠MON的度
如图已知点DF分别是△ABC的边BC上两点点E是边AC上一点∠BFE=∠FEAAB=13AD=12B
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函数fx=x2﹣3x+lnx在x=处取得极大值.
已知x>0y>0z>0且则x+y+z的最小值为
如图是某几何体的三视图则其体积是
光合作用是地球上最重要的化学反应发生在高等植物藻类和光合细菌中. 1地球上生命活动所需的能量主要来源于光反应吸收的.在碳暗反应中RuBP羧化酶R酶催化CO2与RuBPC5结合生成2分子C3.影响该反应的外部因素除光照条件外还包括写出两个内部因素包括写出两个. 2R酶由8个大亚基蛋白L和8个小亚基蛋白S组成.高等植物细胞中L由叶绿体基因编码并在叶绿体中合成S由细胞核基因编码并在中由核糖体合成后进入叶绿体在叶绿体的中与L组装成有功能的酶. 3研究发现原核生物蓝藻蓝细菌R酶的活性高于高等植物.有人设想通过基因工程技术将蓝藻R酶的SL基因转入高等植物以提高后者的光合作用效率.研究人员将蓝藻SL基因转入某高等植物甲的叶绿体DNA中同时去除甲的L基因.转基因植株能够存活并生长.检测结果表明转基因植株中的R酶活性高于未转基因的正常植株. ①由上述实验能否得出“转基因植株中有活性的R酶是由蓝藻的SL组装而成”的推测请说明理由. ②基于上述实验下列叙述中能够体现生物统一性的选项包括. a.蓝藻与甲都以DNA作为遗传物质 b.蓝藻与甲都以R酶催化CO2的固定 c.蓝藻R酶大亚基蛋白可在甲的叶绿体中合成 d.在蓝藻与甲的叶肉细胞中R酶组装的位置不同
已知点Q﹣1mP是圆Cx﹣a2+[y﹣2a﹣4]2=4上任意一点若线段PQ的中点M的轨迹方程为x2+y﹣12=1则m的值为
8分Mycolortelevisionhasgivenmenothingbutaheadache.IwasabletobuyitalittleoverayearagobecauseIhadmyrelativesgivememoneyformybirthdayinsteadofalotofclothesthatwouldn'tfit.IletasalesclerkfoolmeintobuyingadiscontinuedmodelIrealizedthisadaylatewhenIsawnewspaperadvertisementsforthesetatseventy﹣fivedollarslessthanIhadpaidThesetworkedsobeautifullywhenIfirstgotithomethatIwouldkeepitonuntilstationssignedoffforthenightFortunatelyIdidn'tgotanychannelsshowingall﹣nightmoviesorIwouldneverhavegottentobed. ThenIstarteddevelopingaproblemwiththesetthatinvolvedstatic静电noise.Forsomereasonwhencertainshowsswitchedintoacommercialaloudnoisewouldsoundforafewseconds.GraduallythisnoisebegantoappearduringashowandtogetridofitIhadtochangetoanotherchannelandthenchangeitback.SometimesthistechniquewouldnotworkandIhadtopickupthesetandshakeittoremovethesound.Iactuallybegantobuildupmyarmmuscles肌肉shakingmyset. WhenneitherofthesemethodsremovedthestaticnoiseIwouldsithelplesslyandwaitforthenoisetogoaway.AtlastIendeduphittingthesetwithmyfistanditstoppedworkingaltogether.Mytriptotherepairshopcostme$62andthesetisworkingwellnowbutIkeepexpectingmoretrouble. 21.WhydidtheauthorsayhewasfooledintobuyingtheTVset? A.Hegotanoldermodelthanhehadexpected. B.Hecouldn'treturnitwhenitwasbroken. C.Hecouldhaveboughtitatalowerprice. D.Hefailedtofindanymovieshowsonit. 22.WhichofthefollowingcanbestreplacethephrasesignedoffinParagraph1? A.endedalltheirprograms B.providedfewerchannels C.changedtocommercials D.showedall﹣nightmovies 23.HowdidtheauthorfinallygethisTVsetworkingagain? A.Byshakingandhittingit. B.Byturningitonandoff. C.Byswitchingchannels. D.Byhavingitrepaired. 24.Howdoestheauthorsoundwhentellingthestory? A.Curious B.Anxious C.Cautious D.Humorous.
在△ABC中内角ABC的对边分别是abc满足a2+b2﹣c2tanB=b2+c2﹣a2. I求角A Ⅱ△ABC的面积为求的值.
已知函数fx=lnx﹣mxm∈R. I讨论fx的单调性 Ⅱ若方程fx=0存在两个不同的实数根x1x2证明mx1+x2>2.
8分Yourhousemayhaveaneffectonyourfigure.Expertssaythewayyoudesignyourhomecouldplayaroleinwhetheryoupackonthepoundsorkeepthemoff.Youcanmakeyourenvironmentworkforyouinsteadofagainstyou.Herearesomewaystoturnyourhomeintopartofdietplan. Openthecurtainsandturnupthelights.Darkenvironmentsaremorelikelytoencourageovereatingforpeopleareoftenlessself﹣consciouswhenthey'reinpoorlylitplaces﹣andsomorelikelytoeatlotsoffood.Ifyourhomedoesn'thaveenoughwindowlightgetmorelampsandfloodtheplacewithbrightness. Mindthecolors.Researchsuggestswarmcolorsfuelourappetites胃口.Inonestudypeoplewhoatemealsinablueroomconsumed消耗33percentlessthanthoseinayelloworredroom.Warmcolorslikeyellowmakefoodappearmoreappetizingwhilecoldcolorsmakeusfeellesshungry.Sowhenit'stimetorepaintgoblue. Don'tforgettheclock﹣﹣﹣ortheradio.Peoplewhoeatslowlytendtoconsumeabout70fewercalories卡路里permealthanthosewhorushthroughtheirmeals.Beginkeepingtrackofthetimeandtrytomakedinnerlastatleast30minutes.Andwhileyou'reatitactuallysitdowntoeat.Ifyouneedsomehelpslowingdownturnonrelaxingmusic.Itmakesyoulesslikelytorushthroughameal. Downsizethedishes.Bigservingbowlsandplatescaneasilymakeusfat.Weeatabout22percentmorewhenusinga12﹣inchplateinsteadofa10﹣inchplate.Whenwechoosealargespoonoverasmalleronetotalintake摄入jumpsby14percent.Andwe'llpourabout30percentmoreliquidintoashortwideglassthanatallskinnyglass. 1.Thetextisespeciallyhelpfulforthosewhocareabout. A.theirhomecomforts B.theirbodyshape C.housebuying D.healthydiets 2.Ahomeenvironmentinbluecanhelppeople. A.digestfoodbetter B.regaintheirappetites C.burnmorecalories D.reducefoodintake 3.Whatarepeopleadvisedtodoatmealtimes? A.Fatquickly. B.Playfastmusic. C.Usesmallerspoons. D.Turndownthelights. 4.Whatcanbeasuitabletitleforthetest?A.IsYourHouseMakingYouFat?B.WaysofServingDinnerC.EffectsofSelf﹣ConsciousnessD.IsYourHomeEnvironmentRelaxing?
25分假定你是李华计划和同学去敬老院nursinghome陪老人们过重阳节theDoubleNinthFestival.请给外教露西写封邮件邀她一同前往内容包括 1.出发及返回时间; 2.活动包饺子表演节目等. 注意1.词数100词左右; 2.可以适当增加细节以使行文连贯; 3.结语已为你写好. Lookingforwardtoyourreply. Yours LiHua.
已知i是虚数单位若复数为纯虚数ab∈R则|z|=
函数fx=x﹣3ex的单调递增区间是
已知函数a>0的最小值为2则实数a=
6分ChooseYourOne﹣DayTours TourA﹣Bath&StonchengeincludingentrancefeestotheancientRomanbathroomsandStonehenge﹣£until26Marchand£39thereafter. Visitthecitywithover2000yearsofhistoryandBathAbbeytheRoyalCrescentandtheCostumeMuseum.Stonehengeisoneoftheworld'smostfamousprehistoricmonumentsdatingbackover5000years. TourB﹣Oxford&StratfordincludingentrancefeestotheUniversityStMary'sChurchTowerandAnneHathaway'shouse一32until12Marchand36thereafter. OxfordIncludesaguidedofEngland'soldestuniversitycityandcolleges.Lookoverthecityofdreamingspires尖顶formStMary'sChurchTower.StratfordIncludesaguidedtourexploringmuchoftheShakespearewonder. TourC﹣WindsorCastle&HamptonCourtincludingentrancefeestoHamptonCourtPalace﹣﹣£34untilMarchand£37thereafter. IncludesaguidedtourofWindsorandHamptonCourtHenryMill'sfavouritepalace.FreetimetovisitWindsorCastleentrancefeesnotincluded.With500yearsofhistoryHamptonCourtwasoncethehomeoffourKingsandoneQueen.Nowthisformerroyalpalaceisopentothepublicasamajortouristattraction.Visitthepalaceanditsvarioushistoricgardenswhichincludethefamousmaze迷宫whereitiseasytogetlost! TourD﹣CambridgeincludingentrancefeestotheTowerofSaintMarytheGreat﹣£33.until18Marchand£37thereafter. IncludesaguidedtourofCambridgethefamousuniversitytownandthegardensofthe18thcentury. 33.WhichtourwillyouchooseifyouwanttoseeEngland'soldestuniversitycity? A.TourAB.TourBC.TourCD.TourD 34.Whichofthefollowingtourschargesthelowestfeeon17March? A.WindsorCastle&HamptonCourt. B.Oxford&Stratford C.Bath&Stonehenge. D.Cambridge. 35.WhyisHamptonCourtamajortouristattraction? A.Itusedtobethehomeofroyalfamilies. B.Itusedtobeawell﹣knownmaze C.ItistheoldestpalaceinBritain D.Itisaworld﹣famouscastle.
已知过抛物线Cy2=8x的焦点F的直线l交抛物线于PQ两点若R为线段PQ的中点连接OR并延长交抛物线C于点S则的取值范围是
流行性感冒流感由流感病毒引起传播速度快波及范围广严重时可致人死亡. 1流感病毒必须在内增殖当侵染人呼吸道上皮细胞时会经过穿入脱壳生物合成和成熟释放等几个阶段. 2流感病毒的抗原刺激人体免疫系统使B细胞增殖分化为细胞后者能产生特异性抗体. 3HA和NA是流感病毒表面的两种糖蛋白甲型流感病毒的HANA氨基酸序列的变异频率非常高导致每年流行的病毒毒株可能不同.每年要根据流行预测进行预防接种的免疫学原理是. 4研究者通过实验观察NA抗体对病毒侵染细胞的抑制作用.主要实验材料包括感染流感病毒后63天21天的两位康复者的NA抗体分别为D63D21对照抗体流感病毒和易感细胞. ①实验的主要步骤依次是培养易感细胞选择并排序等. a.将抗体分别与流感病毒混合 b.将各混合物加入同一细胞培养瓶 c.将各混合物分别加入不同细胞培养瓶 d.检测NA抗体与易感细胞的结合率 e.检测培养物中病毒的增殖量 f.检测细胞对病毒的损伤程度 ②图中实验结果表明这两位康复者均产生了抗NA的抗体其中对流感病毒抑制效果较好的抗体是.选用的对照抗体应不能与特异性结合. ③依据本实验结果提出疫苗研制的思路. 5若你已被确诊为流感患者请例举具体的应对措施.①做好隔离防护措施防止传染他人 ②及时去医院治疗避免病情加重 ③多喝水多休息.
如图已知四棱锥P﹣ABCD的底面为直角梯形AD∥BC∠ADC=90°且AD=2BC=2CDPA=PB=PD. I求证平面PAD丄平面ABCD II设∠PAD=45°求二面角B﹣PD﹣C的余弦值.
已知角θ的顶点与原点重合始边与x轴正半轴重合终边过点P﹣12则tan2θ=
在等差数列{an}中若前10项的和S10=60且a7=7则a4=
已知F1F2是双曲线E﹣=1的左右焦点点M在E上MF1与x轴垂直sin∠MF2F1=则E的离心率为
已知过点0﹣1与曲线x>0相切的直线有且仅有两条则实数a的取值范围是.
10分Trainingforamarathonrequirescarefulpreparationandsteadygradualincreasesinthelengthoftheruns.36buythebest﹣fittingbest﹣builtrunningshoesyoucanfind.Noonecansaywhichbrandwillworkbestforyouorfeelbestonyourfeetsoyouhavetorelyonyourexperienceandonthefeelofeachpairasyoushop.Whenyouhavefoundshoesthatseemrightwalkinthemforafewdaystodouble﹣checkthefit.37.Asalwaysyoushouldstretch伸展atleasttenminutesbeforeeachruntopreventinjuries. Duringthefirstweekdonotthinkaboutdistancebutrunfiveminuteslongereachday.38itiswisetotakeadayofftorest.Butduringthenextweeksetagoalofatleastamileandahalfperrun.39.Aftertwoweeksstarttimingyourself.40.Dependingonthekindofraceyouplantoenteryoucansetupatimetablefortheremainingweeksbeforetherace. A.Aftersixdays B.Foragoodmarathonrunner C.Beforeyoubeginyourtraining D.Witheachdayincreasethedistancebyahalfmile E.Iftheystillfeelgoodyoucanbeginrunninginthem F.Timespentforpreparationraisesthequalityoftraining G.Nowyouarereadytofigureoutagoalofimprovingdistanceandtime. 36. 37. 38. 39. 40.
某商场为了了解毛衣的月销售量y件与月平均气温x℃之间的关系随机统计了某4个月的月销售量与当月平均气温其数据如表 由表中数据算出线性回归方程=bx+a中的b=﹣2气象部门预测下个月的平均气温约为6℃据此估计该商场下个月毛衣销售量约为件.
8分Morestudentsthaneverbeforearetakingagap﹣year间隔年beforegoingtouniversity.Itusedtobecalledtheyearoffbetweenschoolanduniversity.Thegap﹣yearphenomenonoriginated起源withthemonthsleftovertoOxbridgeapplicantsbetweenentranceexamsinNovemberandthestartofthenextacademicyear. Thisyear25310studentswhohaveacceptedplacesinhighereducationinstitutionshaveputofftheirentryuntilnextyearaccordingtostatisticsonuniversityentranceprovidedbyUniversityandCollegeAdmissionsSerbiceUCAS. Thatisarecord14.7%increaseinthenumberofstudentstakingagapyear.TonyHigginsfromUCASsaidthatthestatisticsaregoodnewsforeveryoneinhighereducation.Studentswhotakeawell﹣plannedyearoutaremorelikelytobesatisfiedwithandcompletetheirchosencourse.Studentswhotakeagapyearareoftenmorematureandresponsiblehesaid. Butnoteveryoneishappy.OwainJamesthepresidentoftheNationalUnionofStudentsNUSarguedthattheincreaseisevidenceofstudenthadship﹣youngpeoplearebeingforcedintoearningmoneybeforefinishingtheireducation.Newstudentsarenowawarethattheyarelikelytoleaveuniversityupto£15000indebt.Itisnotsurprisingthatmoreandmorestudentsaretakingagapyeartoearnmoneytosupporttheirstudyforthedegree.NUSstatisticsshowthatover40%ofstudentsareforcedtoworkduringtermtimeandthefigureincreasesto90%duringvacationperiodshesaid. 29.Whatdowelearnaboutthegapyearfromthetext? A.Itisflexibleinlength. B.Itisatimeforrelaxation. C.Itisincreasinglypopular. D.Itisrequiredbyuniversities. 30.AccordingtoTonyHigginsstudentstakingagapyear. A.arcbetterpreparedforcollegestudies B.knowalotmoreabouttheirfuturejobs C.aremorelikelytoleaveuniversityindebt D.haveabetterchancetoentertopuniversities 31.HowdoesOwainJamesfeelaboutthegap﹣yearphenomenon? A.He'spuzzled. B.He'sworried. C.He'ssurprised. D.He'sannoyed. 32.WhatwouldmoststudentsdoontheirvacationaccordingtoNUSstatistics? A.Attendadditionalcourses. B.Makeplansforthenewterm. C.Earnmoneyfortheireducation. D.Preparefortheirgraduatestudies.
用a1a2…a10表示某培训班10名学员的成绩其成绩依次为85689575889290807887.执行如图所示的程序框图若分别输入a1的10个值则输出的的值为
甲乙是严重危害某二倍体观赏植物的病害.研究者先分别获得抗甲乙的转基因植株再将二者杂交后得到F1结合单倍体育种技术培育出同时抗甲乙的植物新品种.以下对相关操作及结果的叙述错误的是
已知实数xy满足则的取值范围为.
15分Theadobedwellings土坯房61buildbythePuebloIndiansoftheAmericanSouthwestareadmiredbyeven62mostmodernofarchitectsandengineers.Inadditiontotheirsimplebeautywhatmakestheadobedwellingsadmirableistheir63abletoairconditionahousewithout64useelectricequipment.Wallsmadeofadobetakeintheheatfromthesunonhotdaysandgiveoutthatheat65slowduringcoolnightsthuswarningthehouse.Whenanewdaybreaksthewallshavegivenuptheirheatandarenowcoldenough66coolthehouseduringthehotday67thesametimetheywarmupagainforthenightThiscycle68godayafterdayThewallswarmupduringthedayandcooloffduringthenightandthusalwaysatimelyoffset抵消fortheoutsidetemperatures.As69naturearchitectsthePuebloIndiansfiguredoutexactly70thicktheadobewallsneededtobetomakethecycleworkonmostdays. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70.
10分假如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的以下作文.文中共有10处错误每句中最多有两处.错误涉及单词的增加删除或修改. 增加在缺词处加一个漏词符号∧并在此符号下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错词下面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. OnedaylittleTonywenttoashoppingcenterwithhisparent.Itwasverycrowded.Tonysawatoyonashopwindow.Helikeditsoverymuchthathequicklywalkedintotheshop.Afterlooksatthetoyforsometimeheturnedaroundandfoundwherehisparentsweremissing.Tonywasscaredandbeguntocry.Awomansawhimcryingandtellinghimtowaitoutsideashop.Fiveminuteslater.Tonysawparents.MomsaidHownicetoseeyouagain!DadandIwereterribleworried.Tonypromisedherthatthiswouldneverhappenagain.
30分Wheredoyougowhenyouwanttolearnsomething?Afriend?Atutor?Theseareall41acesoflearning.Butitmaywellbethatthelearningyoureallywant42somewhereelseinstead.Ihadthe43ofseeingthisfirsthandona44. Mydaughterplaysonarecreationalsoccerteam.Theydidverywellthisseasonandso45atournamentwhichnormallywasonlyformoreskilledclubteams.Thisledtosome46experiencesonSaturdayastheyplayedagainstteams47trained.Throughthefirsttwogamesher48didnotgetonseriousshotongoal.AsapparentI49seeingmydaughterplayingherbest50stilldefeated. ITseemedthatsomethingclickedwiththe51betweenSaturdayandSunday.Whenthey52fortheirSundaygametheywere53different.Theyhadbegunintegrate融合thekindsofplayandteamworktheyhad54thedaybeforeintotheir55.Theyplayedaggressivelyand56scoredagoal. It57methatplayingagainsttheotherteamwasagreat58momentforallthegirlsontheteam.Ithinkitisageneralprinciple.59isthebestteacher.Thelessonstheymaynotbe60whattheywouldhavegotteninschool.Butarecertainlymorepersonalandmeaningfulbecausetheyhadtoworkthemoutontheirown. 41.A.public B.traditional C.official D.special 42.A.passes B.works C.lies D.ends 43.A.dream B.idea C.habit D.chance 44.A.trip B.holiday C.weekend D.square 45.A.won B.entered C.organized D.watched 46.A.painful B.strange C.common D.practical 47.A.less B.poorly C.newly D.better 48.A.fans B.tutors C.class D.team 49.A.imagined B.hated C.avoided D.missed 50.A.if B.or C.but D.as 51.A.girls B.parents C.coaches D.viewers 52.A.dressed B.showedup C.madeup D.planned 53.A.slightly B.hardly C.basically D.completely 54.A.seen B.known C.heard D.read 55.A.styles B.training C.game D.rules 56.A.even B.still C.seldom D.again 57.A.confused B.struck C.reminded D.warned 58.A.touching B.thinking C.encouraging D.learning 59.A.Experience B.Independence C.Curiosity D.Interest 60.A.harmfulto B.mixedwith C.differentfrom D.appliedto.
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高一上学期英语
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