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發表於:2021-03-09
問題詳情:在△ABC中,∠C=90°,∠B=∠22.5°,DE垂直平分AB交BC於E,BC=2+2,則AC=( )A.1 B.2 C.3 D.4【回答】B.【解析】∵DE垂直平分AB,∴∠B=∠DAE,BE=AE...
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發表於:2020-08-09
問題詳情:已知:如圖1,點A是線段DE上一點,∠BAC=90°,AB=AC,BD⊥DE,CE⊥DE,(1)求*:DE=BD+CE.(2)如果是如圖2這個圖形,我們能得到什麼結論?並*.【回答】*:(1)∵BD⊥DE,CE⊥DE,∴∠D=∠E=90°,∴∠DBA+∠DAB=90°...
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發表於:2019-04-13
問題詳情:如圖1,點A是線段DE上一點,∠BAC=90°,AB=AC,BD⊥DE,CE⊥DE,(1)求*:DE=BD+CE.(2)如果是如圖2這個圖形,BD、CE、DE有什麼數量關係?並*.【回答】*:(1)∵BD⊥DE,CE⊥DE,∴∠D=∠E=90°,∴∠DBA+∠DAB=90°,∵∠...
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發表於:2016-12-22
DEPOSADASMONTERO,LuisM.CyranoDEBergeracmeetsCinderella.WashedCrepeDEChine:Silk.DEdaphne'ssilkyheartilyforwho?ThisisMadameDERothschild'sprivateroom.SoweusetheDEBrogliefo...
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發表於:2021-11-17
問題詳情:如圖,在△ABC中,AB=AC,DE是過點A的直線,BD⊥DE於D,CE⊥DE於E.(1)若BC在DE的同側(如圖1)且AD=CE,請寫出:BA和AC的位置關係 .(不必*)(2)若BC在DE的兩側(如圖2)其他條件不變,...
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發表於:2021-07-12
問題詳情:如圖,在△ABC中,DE∥BC,且DE=3cm,=,則BC=______cm,=______.【回答】9知識點:相似三角形題型:未分類...
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發表於:2021-04-25
問題詳情:如圖,已知:AB=DE且AB∥DE,BE=CF.求*:∠A=∠D.【回答】解:*:∵AB∥DE,∴∠B=∠DEF,∴BE=CF,∴BC=EF,在△ABC和△DEF中,AB=DE,∠B=∠DEF,BC=EF∴△ABC≌△DEF(SAS),∴∠A=∠D.知識點:三角形全等的判定題...
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發表於:2024-02-10
1、Noustrouvonsdetoutdansnotremémoire.Elleestuneespècedepharmacie,delaboratoiredechimie,oùonmetauhasardlamaintant??tsurunedroguecalmante,tant??tsurunpoisondangereux.-...
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發表於:2020-01-19
問題詳情:如圖,AB=DE,AC=DF,BE=CF.求*:AB∥DE.【回答】【考點】全等三角形的判定與*質;平行線的判定.【分析】求出BC=EF,根據SSS*△ABC≌△DEF,推出∠B=∠DEF,根據平行線判定推出即可.【解答】*:∵BE...
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發表於:2022-09-03
問題詳情:已知,如圖,在△ABC和△EDB中,∠ACB=∠EBD=90°,點E在BC上,DE⊥AB交AB於F,且AB=ED.求*:DB=BC.試題*練習冊*在線課程分析:由題意得∠D+∠DEB=90°,∠ABC+∠DEB=90°,則∠ABC=∠D,則△ABC≌△E...
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發表於:2021-12-12
Andsuchaninhibitionmightnecessitatedenovoproteinsynthesis.Performingdenovosequencingwithoutknowingaminoacidmassesisverynovel.Adenylosuccinatelyase(ADSL)isabifunctionalenz...
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發表於:2020-04-19
問題詳情:已知:如圖,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...
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發表於:2020-12-07
問題詳情:如圖,點A在DE上,AC=CE,∠1=∠2=∠3,則AB與DE的數量關係為( )A.AB>DE B.AB=DEC.AB<DE D.無法確定【回答】B知...
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發表於:2024-01-28
1、Thegoalofnavigatingconflictistode-escalate.2、Afterward,gobackovertheprocesswithyourteamandlearnfromyourmistakes.Andrememberthattherewillbesomepeopleyoucannotde-escala...
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發表於:2018-05-10
Financingdejuretoupgradethelevelofschoolfinancialmanagement;Mostofthemasdejurepopulation,whoseagestructureandsexstruc-turewereofimbalance,haddevelopedtheNortheasternfront...
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發表於:2020-10-12
問題詳情:﹣22÷﹣[22﹣(1﹣×)]×12【回答】解:原式=------------------2分 =---------3分 =------4分 =--------------5分 =-3-38--------...
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發表於:2018-05-19
WorkareaII:includes2subgradeconstructionteams,1structureconstructionteamand1drainsconstructionteam.Newcountrysideconstructionofthecontentsofwhatisit?...
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發表於:2020-01-27
問題詳情:如圖,在△ABC中,DE∥BC,若,DE=2,則BC的長為 。【回答】6知識點:相似三角形題型:填空題...
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發表於:2019-01-22
EveningdressisderigueurattheCasino.KatimexplainedthatthiskindofbehaviourisderigueurinGambia.instructionastowhenandwhereasilkhatisderigueur....
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發表於:2019-09-23
問題詳情:已知:如圖,AB∥DE,AC∥DF,BE=CF.求*:AB=DE.【回答】*:∵AB‖DE,AC‖DF∴∠ABC=∠DEF,∠ACB=∠DFE(同位角相等)∵BE=CF∴BC=BE+EC=CF+EC=EF∴ΔABC≌ΔDEF∴AB=DE(全等三角形對應邊相等)...
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發表於:2018-07-05
[Latin]defactorecognitiondefactosegregationisasrealassegrationimposedbylaw;adefactostateofwar.Thegeneraltookdefactocontrolofthecountry.Theywillbedefactoinastateofwar.Theb...
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發表於:2018-11-23
Teamspirit;espritdecorpsTheregimenthadastrongespritdecorps.Theregimenthadastrongespritdecorps.theespritdecorpsofafootBallteam.LeRougeetleNoiretlespritdelutteindividuellec...
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發表於:2020-02-22
問題詳情:Infact,mostofuswould theconsequencesofstupid decisionstakenbyothers.A.handle B.solveC.suffer D.follo...
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發表於:2019-01-29
DE值不同的麥芽糊精替代變*澱粉,對其微膠囊化有很大影響;在費林氏法測定還原糖的條件下,比較了果糖和葡萄糖的還原力;分別用葡萄糖和澱粉水解糖為原料,研究了異構化過程中DE值與果糖含量的...
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發表於:2022-04-16
einsteindebroglieformuladebrogliewavelength...