用“OBE”造句大全，OBE造句
AstralProjection:anOBE,wheretheprojectorentersandoperateswithintheastraldimension,orastralplanes.Alsosee:RealTimeProjection,astralplanes,OBE.EnglandcaptainDavidBeckhamhasreceivedanOBEfromtheQueenatBuc...
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...
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...