正方形ABCD和四边形ACEF所在的平面互相垂直,CE⊥AC,EF‖AC,AB=根号2,CE=EF=1,(1)求证CF⊥平面BDE,(2)求二面角A-BE-D的大小急求过程在线等答案
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![正方形ABCD和四边形ACEF所在的平面互相垂直,CE⊥AC,EF‖AC,AB=根号2,CE=EF=1,(1)求证CF⊥平面BDE,(2)求二面角A-BE-D的大小急求过程在线等答案](/uploads/image/z/477941-5-1.jpg?t=%E6%AD%A3%E6%96%B9%E5%BD%A2ABCD%E5%92%8C%E5%9B%9B%E8%BE%B9%E5%BD%A2ACEF%E6%89%80%E5%9C%A8%E7%9A%84%E5%B9%B3%E9%9D%A2%E4%BA%92%E7%9B%B8%E5%9E%82%E7%9B%B4%2CCE%E2%8A%A5AC%2CEF%E2%80%96AC%2CAB%3D%E6%A0%B9%E5%8F%B72%2CCE%3DEF%3D1%2C%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81CF%E2%8A%A5%E5%B9%B3%E9%9D%A2BDE%2C%EF%BC%882%EF%BC%89%E6%B1%82%E4%BA%8C%E9%9D%A2%E8%A7%92A-BE-D%E7%9A%84%E5%A4%A7%E5%B0%8F%E6%80%A5%E6%B1%82%E8%BF%87%E7%A8%8B%E5%9C%A8%E7%BA%BF%E7%AD%89%E7%AD%94%E6%A1%88)
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