名校
解题方法
1 . 如图,一个杯座圆
放置在水平桌面上且内壁光滑的酒杯,杯身的轴截面图形是顶点为O、焦点为
的抛物线,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0cd8f8361751af81c252ca0e80391f.png)
,
为杯口圆的圆心,
足够长,杯脚
.现有一根长![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
的细木棍
放在此酒杯的杯身内,
的中点
在桌面上的投影为
,则下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/00ccf503-2765-4eed-98ff-018bd3f0f772.png?resizew=169)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0cd8f8361751af81c252ca0e80391f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75de1947893e5c7a4d98d4458398fd6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d3576f3e5e11f33104acb737ba3ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddebabfa1569aeb6eb3484e0261ee86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/00ccf503-2765-4eed-98ff-018bd3f0f772.png?resizew=169)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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2021-07-27更新
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