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求知2
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515084627






Joined: 02 Jul 2010
Posts: 2
PostPosted: 2010-Jul-02, 16:43    Post subject: 求知2
四边形ABCD AB∥CD AB<CD BC⊥CD BC=CD=2 点E在BC上，求正△AED的面积
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  No new posts 求知2  (83)   » 515084627 » 2010-07-02 16:43   Post a reply
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