名校
1 . 如图,已知抛物线
的焦点为
,过直线
上一点
(点
不在
轴上)作抛物线的两条切线,切线分别交
轴于点
的中点为
,则下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/636a29cd-f558-4b77-a2cc-9f8c742c1138.png?resizew=295)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235d7dd12f948f5ffb2e5afddc95612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79529ddfb08945e9b736f42088072159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/636a29cd-f558-4b77-a2cc-9f8c742c1138.png?resizew=295)
A.当![]() ![]() ![]() |
B.当![]() ![]() |
C.![]() |
D.![]() ![]() |
您最近一年使用:0次
A.当![]() ![]() ![]() |
B.当![]() ![]() |
C.![]() |
D.![]() ![]() |