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单选题 在平面上,一动点到一定点的距离与它到一定直线的距离之比为1,则动点的轨迹是( )
学科：重修课程（数学五）2023
时间：2025-08-09 07:31:13
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题目1单选题
<img src="https://tihai-oss-cloud.itihey.com/img/255c3156713d86b549329e479e6b45d4.png">A. 8B. 6C. 5D. 9
题目2单选题
抛物线<img src="https://tihai-oss-cloud.itihey.com/img/a28fb04f589a205db995c38bcf63055a.webp">的准线方程为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/f2b27ba1f4b5035fb78ae3c60d71eee4.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/cec4829db67fc88805b05de90bca33e2.webp">C. y=-6D. <img src="https://tihai-oss-cloud.itihey.com/img/224eae015ce1223706293c9bec948fd4.webp">
题目3单选题
抛物线<img src="https://tihai-oss-cloud.itihey.com/img/e509885d8c1a747099702f6cba5a0769.webp">的焦点到准线的距离为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/3d72c03fc3983d2be6b63c7e3ab7025a.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/a7e430afd95d71b4eb7c0598f18934f5.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/8c7c0ff97df608eda3d71c688263e681.webp">D. 1
题目4单选题
准线方程为<img src="https://tihai-oss-cloud.itihey.com/img/5ddd35056b92c0d71cb2fb3231eab478.webp">的抛物线的标准方程为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/b2690af6d5f8989386deca5a5c3adb98.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/2d90bb0aadfde700139a87693be7f506.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/700acccd719bb7916b8be747e2ce4a64.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/05805eadc714f9b5b5660a7873f80ff9.webp">
题目5单选题
已知抛物线<img src="https://tihai-oss-cloud.itihey.com/img/b24bcc0f7b5ed0501bf0f55585c81370.webp">,则抛物线<img src="https://tihai-oss-cloud.itihey.com/img/465151b1cb68176c44c94db26badc632.webp">的焦点坐标为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/6ef725fe542dff19349d83dc9fa24be1.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/59d00308f84f678eceda1ab76b2ccb8f.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/f32c13bd4fb47c803b398de5bea3174d.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/57dc0d796fed142acd01ca152252b34c.webp">
题目6单选题
抛物线<img src="https://tihai-oss-cloud.itihey.com/img/67f9e2eff8916ced6d4437df5f3adf09.webp">的焦点坐标为( )A. <img src="https://tihai-oss-cloud.itihey.com/img/e86ed92071131c8c74910dfaee32fa94.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/dc7cd9b5b2e09f7756a573018673777b.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/b870337c8ab3ab8956a8c6babd14dbf3.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/e25b4f739d6ffae02bdfc95821606c51.webp">
题目7单选题
<img src="https://tihai-oss-cloud.itihey.com/img/01aef08caf2836337ddbcddd3a41ddb8.png"><img src="https://tihai-oss-cloud.itihey.com/img/d71a306db4ad707f18780e03ebcc5b09.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/8168f9ff1ce93a60f55940b3b60383ec.webp">B. <img src="https://tihai-oss-cloud.itihey.com/img/1c57b34f734518da453e29a6573bb170.webp">C. <img src="https://tihai-oss-cloud.itihey.com/img/0c803e28eca190cb62912b1a4ced0ea9.webp">D. <img src="https://tihai-oss-cloud.itihey.com/img/b2b26d2d1c89fd579b82f889091655dc.webp">
题目8单选题
点P是抛物线<img src="https://tihai-oss-cloud.itihey.com/img/00db3c371a5517e46792c7742216a8c4.webp">上一动点,则点P到点(0,1)的距离与到抛物线准线的距离之和的最小值是( )A. 0B. <img src="https://tihai-oss-cloud.itihey.com/img/a30267e871a399bbb271772cd839de79.webp">C. 1D. <img src="https://tihai-oss-cloud.itihey.com/img/38b9b9d40194b3d3282eca12daaa7e35.webp">
题目9单选题
在平面上,到点<img src="https://tihai-oss-cloud.itihey.com/img/383b5fc416f0accd76e72372a383fe09.webp">的距离等于到直线<img src="https://tihai-oss-cloud.itihey.com/img/85d6b15cf10403bbc3a1965c3918f661.webp">的距离的动点P的轨迹是( )A. 直线B. 圆C. 椭圆D. 抛物线
题目10单选题
在平面上,一动点到一定点的距离与它到一定直线的距离之比为1,则动点的轨迹是( )A. 抛物线B. 直线C. 抛物线或直线D. 以上结论均不正确
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