下列曲面的结论中，错误的是（）<br>A:2<img src="/Image1/3d/3dd019a70475357568fcc53c3bff5343.png" />2-3<img src="/Image1/20/204ead39233a1494e3ee155796a2e9f9.png" />2-2＝<img src="/Image1/8a/8ab1d26808d65959c67702a712d6ff68.png" />1表示双叶双曲面<br>B:2<img src="/Image1/3d/3dd019a70475357568fcc53c3bff5343.png" />2+3<img src="/Image1/20/204ead39233a1494e3ee155796a2e9f9.png" />2-2＝<img src="/Image1/8a/8ab1d26808d65959c67702a712d6ff68.png" />1表示单叶双曲面<br>C:2<img src="/Image1/3d/3dd019a70475357568fcc53c3bff5343.png" />2+3<img src="/Image1/20/204ead39233a1494e3ee155796a2e9f9.png" />2-＝<img src="/Image1/8a/8ab1d26808d65959c67702a712d6ff68.png" />1表示椭圆抛物面<br>D:2（<img src="/Image1/3d/3dd019a70475357568fcc53c3bff5343.png" />2+<img src="/Image1/20/204ead39233a1494e3ee155796a2e9f9.png" />2）-<img src="/Image1/8a/8ab1d26808d65959c67702a712d6ff68.png" />2＝1表示锥面