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发表于:2019-07-17
问题详情:如图,将□ABCD的边AB延长至点E,使AB=BE,连接DE,EC,DE交BC于点O.(1)求*:四边形BECD是平行四边形;(2)连接BD,若∠BOD=2∠A,求*:四边形BECD是矩形. ...
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发表于:2019-12-20
问题详情:如图,点D、E分别是△ABC的边AC、BC上的点,AD=DE,AB=BE,∠A=80°,则∠BED= °.【回答】80°.【解答】解:在△ABD与△EBD中,,∴△ABD≌△EBD,∴∠BED=∠A=80°.故*为80.知识点:三角形全等的...
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发表于:2017-01-27
经典语录Themorealternative,themoredifficultthechoice.选择越多越难抉择。...
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发表于:2019-07-04
问题详情:如图,CD⊥AB,BE⊥AC,垂足分别为点D,点E,BE、CD相交于点O.∠1=∠2,则图中全等三角形共有( ) A.2对 B.3对 ...
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发表于:2017-10-15
INTHEsmallworldoftraditionalFrenchCatholicism,everybodyknowsaboutabbeFrancisMichel.TheabbesankuponEdmond'sbed.whileEdmondhimselfremainedstanding.Mostvillagersfollowedabb...
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发表于:2024-02-05
1、Outofthedilemma:themeofNorthangerAbbey2、NorthangerAbbeyisthefirstmaturenovelwrittenbyJaneAusten.3、Hernovels,publishedfrom1811onwards,include"SenseandSensibility",...