1/5单选题
难度：
1.
若ax2＋by2＝b(ab<0)，则这个曲线是( )
| A | 双曲线，焦点在x轴上 |
| B | 双曲线，焦点在y轴上 |
| C | 椭圆，焦点在x轴上 |
| D | 椭圆，焦点在y轴上 |
- 提示1：
- PHA+5YyW5Li65qCH5YeG5pa556iLPC9wPg==
正确答案：Qg==
PHA+5Y6f5pa556iL5Y+v5YyW5Li6PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0I4LzZFL3JCQUNGRlRaYnVYUWRyWkhBQUFCOUZmX2RwZzA4OS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQjgvNkUvckJBQ0ZGVFpidVhRZHJaSEFBQUI5RmZfZHBnMDg5LnBuZyIgaGVpZ2h0PSI2MyIgd2lkdGg9IjEyIj7vvIs8aT55PC9pPjxzdXA+Mjwvc3VwPu+8nTHvvIw8YnI+5Zug5Li6PGVtPmFiPC9lbT4mbHQ7MO+8jOaJgOS7pSZsdDsw77yM5omA5Lul5puy57q/5piv54Sm54K55ZyoPGVtPnk8L2VtPui9tOS4iueahOWPjOabsue6v++8jOaVhemAiUIuPC9wPg==
2/5单选题
难度：
2.
焦点分别为(－2,0)，(2,0)且经过点(2,3)的双曲线的标准方程为( )
| A | x2－ |
| B |
|
| C | y2－ |
| D |
|
＝1
－y2＝1
－
＝1- 提示1：
- PHA+5b6F5a6a57O75pWw5rOV77yM5oiW6ICF5pWw5a2X54m55b6B5rOVPC9wPg==
正确答案：QQ==
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
3/5单选题
难度：
3.
双曲线
－
＝1的一个焦点为(2,0)，则m的值为( )
| A |
|
| B | 1或3 |
| C |
|
| D |
|
- 提示1：
- PHA+5Yip55So5Y+M5puy57q/5qCH5YeG5pa556iL5Lit77yMPGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0I4LzZFL3JCQUNGRlRaYnZYeVlyZmNBQUFCNlVWZzkxTTExMy5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQjgvNkUvckJBQ0ZGVFpidlh5WXJmY0FBQUI2VVZnOTFNMTEzLnBuZyIgaGVpZ2h0PSIyMSIgd2lkdGg9Ijc3Ij48L3A+
正确答案：QQ==
PHA+4oi15Y+M5puy57q/55qE54Sm54K55Li6KDIsMCnvvIzlnKg8aT54PC9pPui9tOS4iuS4lDxpPmM8L2k+77ydMu+8jDxicj7iiLQ8aT5tPC9pPu+8izPvvIs8aT5tPC9pPu+8nTxpPmM8L2k+PHN1cD4yPC9zdXA+77ydNC7iiLQ8aT5tPC9pPu+8nTxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9COC82RS9yQkFDRkZUWmJ2V3o5ZnlsQUFBQk1CZkZ4NVkyMjcucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0I4LzZFL3JCQUNGRlRaYnZXejlmeWxBQUFCTUJmRng1WTIyNy5wbmciIGhlaWdodD0iNDMiIHdpZHRoPSI4Ij4uPC9wPg==
4/5单选题
难度：
4.一动圆与两圆：x2＋y2＝1和x2＋y2－8x＋12＝0都外切，则动圆圆心的轨迹为( )
| A | 抛物线 |
| B | 圆 |
| C | 双曲线的一支 |
| D | 椭圆 |
- 提示1：
- 5Lik5ZyG5aSW5YiH77yM5YiZ5ZyG5b+D6Led5Li65Y2K5b6E5LmL5ZKM
正确答案：Qw==
55Sx6aKY5oSP5Lik5a6a5ZyG55qE5ZyG5b+D5Z2Q5qCH5Li6PGk+TzwvaT48c3ViPjE8L3N1Yj4oMCwwKe+8jDxpPk88L2k+PHN1Yj4yPC9zdWI+KDQsMCnvvIw8YnI+6K6+5Yqo5ZyG5ZyG5b+D5Li6PGk+TzwvaT7vvIzliqjlnIbljYrlvoTkuLo8aT5yPC9pPu+8jOWImXw8aT5PTzwvaT48c3ViPjE8L3N1Yj5877ydPGk+cjwvaT7vvIsx77yMfDxpPk9PPC9pPjxzdWI+Mjwvc3ViPnzvvJ08aT5yPC9pPu+8izLvvIw8YnI+4oi0fDxpPk9PPC9pPjxzdWI+Mjwvc3ViPnzvvI18PGk+T088L2k+PHN1Yj4xPC9zdWI+fO+8nTE=
5/5单选题
难度：
5.已知双曲线中心在坐标原点且一个焦点为F1(－
，0)，点P位于该双曲线上，线段PF1的中点坐标为(0,2)，则该双曲线的方程是( )
，0)，点P位于该双曲线上，线段PF1的中点坐标为(0,2)，则该双曲线的方程是( ) | A |  －y2＝1 |
| B | x2－ ＝1 |
| C |  － ＝1 |
| D |  － ＝1 |
- 提示1：
- 5b6F5a6a57O75pWw5rOV
正确答案：Qg==
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