相关.AC的文学知识

问题详情：如图．PA、PB是⊙O的切线．AC是⊙O的直径．∠P=50°，则∠BOC的度数为 A．50°   B．25° C．40°   D．60°  【回答】A知识点：点和圆、直线和圆的位置关系题型：选择题...

问题详情：如图，△ABC和△A′B′C′关于直线m对称．(1)结合图形指出对称点；(2)延长线段AC与A′C′，它们的交点与直线m有怎样的关系？其他对应线段(或其延长线)的交点呢？你发现了什么规律，请叙述出来并与同伴交流．【回答】(1)C′与...

问题详情：如图示，三根长度均为L的细杆AB、AC、AD下端固定在A点．AC杆竖直．α＞β，杆的端点连接有光滑金属丝BC、CD．金属丝上套有光滑小环*、乙．使小环*、乙分别从C点沿金属丝CB、CD下滑到B和D点，下滑时间分别为t*、t乙．下列正确的...

1、AC/DCandDC/ACConvertyCircuitsinPowerSupplyEquipment;2、StudyonDoubly-fedInductionGenerationSystemwithAC/DC/ACExcitationConverter;3、ElectroMagneticCompatibilityDesignofAC/DC/ACConverterUsedinWindPo...

问题详情：如图，在△ABC中，AB=AC，AC的垂直平分线分别交BC、AC于点D、E.   (1)若AC=12，BC=15，求△ABD的周长；（2）若∠B=20°，求∠BAD的度数. 【回答】知识点：画轴对称图形题型：解答题...

HXN5High-powerACDriveDieselLocomotiveCarbodyofNXN3high-powerACdiesellocomtoveThepaperintroducesanovelmicrocomputer-basedwithnon-contacttechnicalityofthehighpowerACcompensatedstabilizer....

问题详情：已知：如图，DE⊥AC，BF⊥AC，AD=BC，DE=BF，.求*：AB∥DC【回答】.∵DE⊥AC,BF⊥AC,∴∠AED=∠CFB=90°∠AFB=∠CED=90°…………1分在Rt△ADE和Rt△BCF中∴Rt△ADE≌Rt△BCF(HL)…………3分∴AE=CF…………4分∴AE+EF=CF+...

问题详情：已知:如图,四边形ABCD的对角线AC,BD交于点O,BE⊥AC于E,DF⊥AC于F,点O既是AC的中点,又是EF的中点.(1)求*:△BOE≌△DOF.(2)若OA=BD,则四边形ABCD是什么特殊四边形?说明理由.【回答】【解析】(1)∵BE⊥AC,DF⊥A...

问题详情：已知点B在直线AC上，AB=8cm，AC=18cm，p、Q分别是AB、AC的中点,则PQ=____．【回答】5cm或9cm．知识点：直*、*线、线段题型：填空题...

问题详情：已知：AB=AC，且AB⊥AC，D在BC上，求*：．【回答】*见解析【分析】作AE⊥BC于E，由于∠BAC=90°，AB=AC，得到△BAC是等腰直角三角形，再由等腰直角三角形的*质得到BE=AE=EC，进而得到BD=AE－DE，DC=AE+DE，代入BD2+CD2计算，结合勾股定理，即...

1、90-wattACadapterandpowercord2、"RechangethebatteryorplugtheACadapteroutputintotheACadapter3、PlugtheACadapterinandprintagain.4、ThebalanceispoweredbyanACadapter.5、PlugintheACadapterandrestartyour...

问题详情：如图，∠A=∠E，AC⊥BE，AB=EF，BE=10，CF=4，则AC=．【回答】6．【考点】全等三角形的判定与*质．【分析】由AAS*△ABC≌△EFC，得出对应边相等AC=EC，BC=CF=4，求出EC，即可得出AC的长．【解答】解：∵AC⊥BE，∴∠ACB=∠ECF=90°，在△ABC和...

问题详情：如图，AD⊥AE，AB⊥AC，AD＝AE，AB＝AC.求*：△ABD≌△ACE.                                              【回答】*：∵AD⊥AE，AB⊥AC，∴∠CAB＝∠DAE＝90°.∴∠CAB＋∠CAD＝∠DAE＋∠...

问题详情：DoyouknowwhatschoollifeislikeinSingapore?InSingapore,aclassonlylastshalfanhour,buttherearenobreaksbetweenclasses.Thestudentsonlyhavea30-minuteteabreakafter3or4classes.Theydonotdoeyeexercises.Y...

UsingACcontactorformotor’sphasebreakprotectionisimproperInsideisinstalledACcontactor,thermalreplay,self-settableconversionswitch.FuzzyComprehensiveEvaluationandControlofBestClosingMakingAngleofRotati...

FouriertransformACvoltammetrysiliconcontrolledvoltagestabilizedAClightadjusterAC,DCorAirmotorpoweroptions.ResearchonSinglePhaseAC/ACOnvertersBasedonSimpleTopologies;ThevariablefrequencyACcontrollermou...

问题详情：如图，AB＝AC，AB⊥AC，AD⊥AE，且∠ABD＝∠ACE．求*：BD＝CE．【回答】*：∵AB⊥AC，AD⊥AE，∴∠BAE+∠CAE＝90°，∠BAE+∠BAD＝90°，∴∠CAE＝∠BAD．又AB＝AC，∠ABD＝∠ACE，∴△ABD≌△ACE（ASA）．∴BD＝CE．知识点：各地中考题型：解答题...

Two-waypowersupplyletsyouuseeitherbatteriesorACadaptor(soldseparately).ConsumablessuchasACadaptorarecoveredforupto3monthsfromthedateofpurchase....

问题详情：如图，D、E分别是AB、AC的中点，CD⊥AB于D，BE⊥AC于E，求*：AC=AB．【回答】【考点】轴对称的*质；全等三角形的判定．【专题】*题．【分析】作辅助线：连接BC，由CD垂直于AB，且D为AB中点，即CD所在直线为AB的垂直平分线，根据线段垂直...

问题详情：题面：如图，已知AC⊥BC，BD⊥AD，AC与BD交于O，AC=BD．求*：(1)BC=AD；     (2)△OAB是等腰三角形．【回答】详解：(1)∵AC⊥BC，BD⊥AD，∴△ABC与△BAD是直角三角形，在△ABC和△BAD中，∵AC=BD，AB=BA，∠ACB=∠BDA=90°，∴△ABC≌△B...

问题详情：MoreAmericanpeopletaketheirtroubleswiththemonholiday,accordingtoanewsurvey.Although40percentsaidthatthemainreasonforgoingawayistoescapepressure(压力)fromwork,almostallsaidtheyworrymorethanthey...

问题详情：OneOctobermorning,Igotofftheall-nighttraininMandalay,acityinMyanmar.Aroughmancameupandofferedtoshowmearound.ThepriceheaskedwaslessthanIwouldpayforabarofchocolateathome.SoIclimbedintohistrishaw...

问题详情：TheaverageFacebookuserintheUnitedStateshas245friends,accordingtoastudy________inFebruary.A．publishing B．publishedC．publish D．topublish【回答】B知识点：非谓语动词题型：选择题...

1、AutomaticexchangeforDCandACsupply.2、DisconnecttheACsupplyleadplugfromtheACoutletwhentheunitinnotituseforextendedperiods.3、RemovetheACsupplyleadbeforeservicingorcleaningheads,rolleretc.4、Insertin...

问题详情：如图，在△ABC中，AC=BC，∠ACB=90°，AE平分∠BAC交BC于E，BD⊥AE于D，DF⊥AC交AC的延长线于F，连接CD，给出四个结论：①∠ADC=45°；②BD=AE；③AC+CE=AB；④AB﹣BC=2FC；其中正确的结论有(    )A．1个 B．2个  C．3个 D．4个【回答】D...