如图竖立在点B处的标杆AB=2.5米,某观察者站立在点F处,从点E处看到杆顶A,树顶C在一直线上(点F,B,D也在一竖立在点B处的标杆AB=2.5米,某观察者站立在点F处,从点E处看到杆顶A,树顶C在一直线上(
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![如图竖立在点B处的标杆AB=2.5米,某观察者站立在点F处,从点E处看到杆顶A,树顶C在一直线上(点F,B,D也在一竖立在点B处的标杆AB=2.5米,某观察者站立在点F处,从点E处看到杆顶A,树顶C在一直线上(](/uploads/image/z/11505234-66-4.jpg?t=%E5%A6%82%E5%9B%BE%E7%AB%96%E7%AB%8B%E5%9C%A8%E7%82%B9B%E5%A4%84%E7%9A%84%E6%A0%87%E6%9D%86AB%3D2.5%E7%B1%B3%2C%E6%9F%90%E8%A7%82%E5%AF%9F%E8%80%85%E7%AB%99%E7%AB%8B%E5%9C%A8%E7%82%B9F%E5%A4%84%2C%E4%BB%8E%E7%82%B9E%E5%A4%84%E7%9C%8B%E5%88%B0%E6%9D%86%E9%A1%B6A%2C%E6%A0%91%E9%A1%B6C%E5%9C%A8%E4%B8%80%E7%9B%B4%E7%BA%BF%E4%B8%8A%EF%BC%88%E7%82%B9F%2CB%2CD%E4%B9%9F%E5%9C%A8%E4%B8%80%E7%AB%96%E7%AB%8B%E5%9C%A8%E7%82%B9B%E5%A4%84%E7%9A%84%E6%A0%87%E6%9D%86AB%3D2.5%E7%B1%B3%2C%E6%9F%90%E8%A7%82%E5%AF%9F%E8%80%85%E7%AB%99%E7%AB%8B%E5%9C%A8%E7%82%B9F%E5%A4%84%2C%E4%BB%8E%E7%82%B9E%E5%A4%84%E7%9C%8B%E5%88%B0%E6%9D%86%E9%A1%B6A%2C%E6%A0%91%E9%A1%B6C%E5%9C%A8%E4%B8%80%E7%9B%B4%E7%BA%BF%E4%B8%8A%EF%BC%88)
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