- 问题详情:已知:如图,AB是⊙O的直径,AD是弦,OC垂直AD于F交⊙O于E,连接DE、BE,且∠C=∠BED.(1)求*:AC是⊙O的切线;(2)若OA=10,AD=16,求AC的长. 【回答】(1)*:∵∠BED=∠BAD,∠C=∠BED,∴∠BAD=∠C.(1分)∵OC⊥AD于点F,∴∠BAD+∠AOC=90°.(2分)∴∠C+∠AOC=90°.∴∠OAC=90°.∴OA⊥AC.∴AC是⊙O的切线.(4分)(2...
- 4708
- 问题详情: 如图,AB是⊙O的直径,点E是上的一点,∠DBC=∠BED.⑴.求*:BC是⊙O的切线;⑵.已知AD=3,CD=2,求BC的长.【回答】1)AB是⊙O的直径,得∠ADB=90°,从而得出∠BAD=∠DBC,即∠ABC=90°,即可*BC是⊙O的切线;(2)可*△ABC∽△BDC,则=,即可得出BC=;知识点:点和圆、直线和圆的位置关系题型:解答题...
- 30564
- Thankgod,weboughtaverygoodairbed.Charactersandmainuse:lightweighted,flexible,goodlowtemperatureresistance,airtightnessandheatwelt.suitableformakinglifejacket,airbag,airbed,aircushionandwaterbag.Ahardday'sworkmayleaveyousorebutanight'sontheairbedwil...
- 19774
- 1、Hesaidthemoderntraditionofthemaritalbedonlybeganwiththeindustrialrevolution,whenpeoplemovingtoovercrowdedtownsandcitiesfoundthemselvesshortoflivingspace.2、Themaritalbed,oncethesymbolofAmericanmatrimonyonaparwiththediamondring,thetieredweddingcake...
- 4612
- simulatedmovingbedseparatoranalogmovingbedadsorptionseparationabed-cum-sittingroomTherivetsbedagainsttheflatplate.I'llbeddownonthesofa.Shetuckedtheboyinbed.Thecoinrolledunderthebed.Dear,gotobed.You'reslumbering.Theroomwasneat,thebedmade—arusticlog...
- 6649
- Theypassedthedrybedofarivulet.Isankgratefullyintothewarm,drybed.Accordingtothethermolysisassessmentstandardofreservoiroilpotentialwhichisbasedonthethermolysisdataofacertainbasin,areservoircouldbequalitivelyclassifiedintooilbed,oil-waterbed,water-bear...
- 19304
- 1、makingofseedlingbed2、seedlingbedtemperature3、Studyoneffectofdrenchfulvicfertilizertopaddyseedlingbed4、Itisconcludedthat90%istheoptimisticsoilmoisturecontentfortomatoseedlingbedirrigation.5、Thestudyonvariousformofseedlingbedandseedlingshedwasca...
- 10638
- Weredesignboardoflathebedanddoorderoptimization.Thelathebedismadeofcastiron.Nowlathebedlackseffectivedesignofrationalbasis;structuraldesignbedisnotenoughreasonable.Parametersrecognition,opitimizationandFEMmodelingforjointingsurfaceofaCNClathebedAflex...
- 28604
- Thesecondandninthelectrichorizonsarelowresistivitymarkerbedsinthisarea.Oneormorekeymarkerbedswereidentifiedforthepurposeofleasinganddrilling....
- 5391
- Whynotchooseabunkbedforyourchildren?Isthatasofaorabunkbed?Ourproductsare:largesolidwoodbeds,solidwoodbunkbeds,andsolidwoodbedcluster.BaikickedoffhersandalsandsprawledoutonaTromsobunkbed.Motherboostedtheyoungsterintothetopofhisbunkbed.Fromundertheduve...
- 28340
- bedsoresareacommoncomplicationincasesofparalysis."Inactivityandbedsoreswerepushingthemtowarddeath…heredeathissoclose,"hesaid.ObjcetiveTostudytheadvantagesoftreatinglargeseriousbedsoresbygentamicinandinfraredrays.Heusedtodonothingbutlieinbed,listen...
- 16875
- DynamicsimulationofanexpandedbedreactorforMTBEsynthesisSeparationoflactoferrinfromwheybyexpandedbedadsorptionwithmixed-modeadsorbentDuetofluidization,thestaticbedofsandparticlesexpandsandtheheightoftheexpandedbeddependsuponthefluidizingvelocity....
- 28439
- Shethoughtwewereofftosearchthedrycreekbed,andIdidn'tcorrecther.Arching275feet(84meters)acrossand290feet(88meters)abovethecreekbedbelow,RainbowBridgeintheUtahdeserthasbeenasourceofinspirationandwondermentformillennia.Theconstructionworkerenlistedhise...
- 11259
- 1、Afterurinating,hecarefullyputthetilebasinbackonthestoolandslippedintothehotbed.2、Steelcoatedwithalayerofzinc.Usuallyprocessedbydippingthesteelintoahotbedofzinc.3、Inthewintermorning,whenitwasdarkoutsidethewindow,mymotherkickedmeoutofthehotbedandt...
- 21327
- AttackingchelatingacidcompletionfluidforimprovingreservoirbedSaertuoil-bearinglayerinDabeiOilfieldisanextra-lowpermeablereservoirbed.Accordingthethedistributionofancienthydrodynamicpotentialinreservoirbed,the...Afarmerandhishorsewalkonadryreservoirbe...
- 20263
- ANNmodelforflowresistanceofmovablebedformedbyuniformsedimentChooseabedwithmovablebedside,thenacomfortableanglecanbeadjustedbyyou.TheeffectsofpermeablepilegroyneslaidoutalongthethalwegincontrolandguidetheregimeofthelowerYellowRiverhavebeenstudiedthrou...
- 22685
- Thewholebreast,chestwallandregionallymphnodeswereirradiated,followedbytumorbedboostforallpatients.Interstitialbrachytherapy,theplacementoftheisotopeintoatumorbedwherenolumenexists,hasbeendescribedbutisutilizedinfrequentlyinclinicalpractice....
- 15512
- Thefourthoilshalebeddevelopedinlacustrinebogdistributesunsteadilywithsmallthickness.Itisbelongtotheoilshaleofmiddleashandoilyield.Theshalebedsinbetweengenerallydeformplastically....
- 13333
- OurmainproductsareLeisurefunctionsofa,singlesofa,kidssofa,sofabed,benchandottoman.Theyofferalounge-diningroomwithdoublesofabed.Thekitchenhasanelectriccookerandanoven.Forexample,thiskindofsofabedoflargefurnitureisnowaytomovethroughartificial.AssoonasA...
- 9603
- Napoleondiesonhisdeathbed,wakesupinheavensayingJesuisNapoleon.Citi’sbossdivulgedtheinformationinaninternalmemothatwasleaked,causingCiti’ssharepricetorisefromitsdeathbed,havingfallentoaround$1.ItwasBoleslawIIIWrymouththatunifiedPolandanditwashethatw...
- 6715
- 1、Energyevolutiongeneratedbywavespropagateoversubmergedbreakwateronaslopingbed2、WavepropagationoverasubmergedbreakwateronaslopingbedusingalayeredBoussinesqequation3、Florencewascarriedinsideandlaidonaslopingbedinthetreatmentroom.Peoplegatheredaroun...
- 17703
- Howfragranttheflowersareintheflowerbed!Shekneltdowntopullaweedfromtheflowerbed.We'llHelpYouGrow-Whetherit'swateringasingleflowerbedinyouryardordevelopingyourirrigationbusiness.Weworkedinthegardenfortwohoursandthesumtotalofalloureffortswasonlyoneflo...
- 8842
- 问题详情:---WhereisTom? ---Ithinkhe’sstillin bed,buthemightjustbein bathroom. A./,/ B./,the C.the,the ...
- 26505
- 1、Rectangularspoutedbedhadbetterhydrodynamicsanddesulfurizationcharacteristicthanconical-cylindricspoutedbed.2、Anewsemi-drydesulfurizationtechniqueusingsprayspoutedbedwasproposedwhichconnectedwithfluidizationofspoutedbedandspray-dryingtechnique.3、...
- 28579
- Icannotcomposeanything,Iamclosertothecoffinthanthemarriagebed.-fromGlasgowThuschildrenwhowerenotconceivedinthemarriagebed,weresaidtobeconceived“onthebast”andwerethereforebastards.Theseancientbedsaresodelicatethattheycan'tbeadded.Anewmarriagebedhas...
- 25081