已知a,b为异面直线,AB为a,b公垂线,E,F分别为AB,CD中点,求证AB垂直EF (2)AB=m,CD=n证EF定值图有点畸形请见谅,7.19 7.00前解决给100财富以上
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![已知a,b为异面直线,AB为a,b公垂线,E,F分别为AB,CD中点,求证AB垂直EF (2)AB=m,CD=n证EF定值图有点畸形请见谅,7.19 7.00前解决给100财富以上](/uploads/image/z/8690843-11-3.jpg?t=%E5%B7%B2%E7%9F%A5a%2Cb%E4%B8%BA%E5%BC%82%E9%9D%A2%E7%9B%B4%E7%BA%BF%2CAB%E4%B8%BAa%2Cb%E5%85%AC%E5%9E%82%E7%BA%BF%2CE%2CF%E5%88%86%E5%88%AB%E4%B8%BAAB%2CCD%E4%B8%AD%E7%82%B9%2C%E6%B1%82%E8%AF%81AB%E5%9E%82%E7%9B%B4EF+%282%29AB%3Dm%2CCD%3Dn%E8%AF%81EF%E5%AE%9A%E5%80%BC%E5%9B%BE%E6%9C%89%E7%82%B9%E7%95%B8%E5%BD%A2%E8%AF%B7%E8%A7%81%E8%B0%85%EF%BC%8C7.19+7.00%E5%89%8D%E8%A7%A3%E5%86%B3%E7%BB%99100%E8%B4%A2%E5%AF%8C%E4%BB%A5%E4%B8%8A)
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