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1数学开放题的教学探讨1993A1A0A2A3A4A5A6A7A8A9A10A11A12A13A15A16A17A4A14A18A19A20A21A22A9A24A25A2A23A26A27A29A16A5A6A20A21A9A24A30A28A31A32A33A34A7A35A36A37A39A40A38A41A42A43A44A45A46A9A47A48A49A50A25A20A21A9A51A52A53A22A9A44A17A54A56A56A57A55A59A60A58A59A62A61A63A64A18A19A65A66A67A68A44A70A71A69A72A73A74A75A76A77A78A79A80A81A76A77A78A79A82A83A76A77A78A84A85A86A87A88A89A76A77A78A90A91A92A93A94A95A96A97A89A88A89A98A99A100A101A102A103A95A92A73A104A105A92A106A107A108A109A79A110A111A112A113A100A114A115A73A116A117A100A118A119A98A120A100A121A122A100A123A124A85A88A89A76A77A78A125A114A115A89A126A127A128A100A129A130A131A70A82A83A76A77A84A79A132A133A131A74A75A76A77A79A110A134A131A70A80A81A76A77A84A103A135A136A73A137A138A139A85A140A105A141A142A143A78A100A144A145A146A147A103A88A89A76A77A78A148A149A141A142A150A151A100A123A124A85A152A105A88A89A148A145A153A147A100A123A124A85A95A96A100A88A89A98A120A135A154A124A155A89A126A89A156A157A158A121A134A91A159A123A100A88A89A160A161A162A113A103A160A161A163A164A103A160A161A165A108A103A166A167A124A100A105A155A89A126A89A156A147A88A89A100A168A169A170A171A172A173A103A147A88A89A100A127A128A163A174A175A176A177A71A178A179A106A180A156A103A175A181A182A179A106A126A183A97A100A184A78A85A73A185A186A187A188A189A152A163A190A100A123A124A103A159A123A191A76A77A78A93A149A192A193A98A89A85A161A194A195A125A88A89A76A77A78A98A89A100A104A196A197A113A103A135A86A90A198A103A199A200A201A201A202A98A85A203A204A205A206A207A208A209A210A211A212A213A214A215A216A217A218A219A220A221A222A223A224A105A104A126A97A225A226A227A183A109A79A228A186A229A230A100A223A224A85A76A77A78A231A231A232A174A183A233A103A234A89A126A127A142A100A235A236A237A201A103A127A128A183A238A100A239A240A241A242A103A243A137A244A220A221A222A89A126A245A234A185A104A246A247A248A100A249A250A85A251A252A253A78A231A231A232A174A254A104A103A124A255A89A126A17A0A1A100A2A3A4A149A5A1A145A127A128A85A210A211A146A6A7A8A9A174A100A127A128A10A11A103A89A126A100A127A128A97A191A12A94A104A13A13A14A92A15A16A100A18A19A85A6A212A100A98A89A183A238A103A135A154A67A227A20A149A89A126A149A104A21A76A77A22A23A103A231A251A24A25A185A26A96A100A127A229A85A235A27A76A77A174A98A89A103A237A92A155A89A126A28A29A6A196A30A31A127A229A100A18A19A103A247A76A229A230A100A248A197A103A22A229A32A129A245A22A33A34A35A85A249A36A95A37A38A39A87A40A227A104A41A42A43A123A124A44A134A6A104A106A45A103A95A96A46A47A48A49A50A51A52A82A53A54A55A56A57120A58A59A191100A58A60A61A62A63A64A112A65A66A59A170A68A69A70A71A72A65A66A182A73A59A105A74A75A76A77A78A79A80A81A83A84A85A86A87A88A89A90A912A92A93A219A94A219A95122A96A97A98A94A219A121A99A100A101A102A103A104A106A97A107A94A219A108A109A219A110A208A111A113300A96A91A135A114A115A116A117A118A113A119A75A77A78A79A80A120A122A86A89A90A123A234A118A113A89A90A127A124A125A196A126A102A128A129A196A130A88A131A132A133A134A136A137A138A123A139A140A141A123A94A219A208A111A142A143A134A144A145A119A146300A96A86A120A122A91A147A115A116A117A118A113A75A77A78A79A80A120A122A86A89A90A123A148A149A89A90A150A140A132A134A136A151A123A124A152A196A152A153A154A129A102A103A155A156A196A130A88A131A132A91A157A115A116A117A149A89A90A150A140A132A134A136A158A123A159A219A160A153A124A161A162A102A103A163A132A123A234A164A118A113A167A165A166A168A89A90A91A169A115A116A117A149A89A90A150A140A132A171A172A173A133A134A136A174A138A123A94A219A175A160A124A102A103A163A132A123A234A164A118A113A167A165A86A89A90A169A176A91A177A178A1792A180A181A183A1842A185A186A18716A185A188A189A190A192A193A194A195A198A199A200A201A202A200A203A204A205A206A188A181A207A209A213A214A215A216A200A203A203A217A218A220A186A221A222A223A224A225A226A227A228A230A232SA233ABPIA236A238A239A240A241A242A243A244A246A222A223A247A248A250A251A252A253A254A244A246A255A95A75A89A0A236A237A1A2A76A3A4A175A79A5A6A252A129A244A246A80A75A247A19A247A252A95A75A7A19A17A236A244A246A82A173A237A83A1A17A8A196A9A10A11A12A242A13A14A218A85A15A16A252A88A248A18A20A21A35A22A23A69A24A91A35A252A210A92A210A252A243A93A19A24A94A25A26A22A31A2A121A151A8A223A163A238P116A250A251A66A27A18A20A255A24A94A22A97A2A250A251A28A227A120A99A29P124A236A30A32A33A34A36A37A38A39A40A41A42A43A44A45A46A47A48A49A50A51A52A53A54A55A56A57A58A101A59A57A60A61A102A152A62A62A103A63A64A65A104A67A114A105A59A106A68A70A107A71A117A65A106A68A72A73A59A74A77A78A81A168A53A84A86A212A87A90A203A96A98A56A100A110A108A64A109A112A111A49A50A51A61A203A113A115A116A59A118A57A60A119A122A123A57A61A115A124A125A126A86A127A128A130A131A132A133A134A135A136A137A138A139A136A137A1383A140A141A142A143A144ABCDDCBA1111A145A146A147A148A149A150A153A154A155A162A156A157A182ABCDA158A159A160A161A174A153A164111DBCAA146A165A166A167A169A170A171A172A176A177A178A160A161A179A180A153A181A183A184A185A186A164A180A187A176A188A182A189A190A190A191A192A184A193A194A189A191A195A150A197A198A199A195A200A153A201A202A204A205A187A206A207A208A209A211A176A177A213A214A215A160A161A179A180A153A216A181A183A217A219A204A207A208A209A211A176A214A220A160A161A197A198A199A221A195A176A220A222A223A181A192A153A180A184A185A224A225A226A227A228A229A188A182A153A230A216A204A231A214A215A160A161A197A198A177A232A153A233A234A177A235A236A238A238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