已知直线
与平面
平行,P是直线
上的一点,平面
内的动点B满足:PB与直线
成
.那么B点轨迹是
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189377703936/1571189383069696/STEM/40dfffb634b7445ab9da2e0076afd672.png)
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189377703936/1571189383069696/STEM/72563502e90040498a48bc55bdb4cf02.png)
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189377703936/1571189383069696/STEM/40dfffb634b7445ab9da2e0076afd672.png)
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189377703936/1571189383069696/STEM/72563502e90040498a48bc55bdb4cf02.png)
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189377703936/1571189383069696/STEM/40dfffb634b7445ab9da2e0076afd672.png)
![](https://img.xkw.com/dksih/QBM/2013/4/19/1571189377703936/1571189383069696/STEM/cb04502d27574ca6a1f24a1b6c212112.png)
A.双曲线 | B.椭圆 | C.抛物线 | D.两直线 |
2013·湖南长沙·一模 查看更多[2]
更新时间:2013-04-15 22:56:55
|
【知识点】 立体几何中的轨迹问题
相似题推荐
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【推荐1】在棱长为1的正方体
中,
分别为
的中点,点
在正方体的表面上运动,且满足
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329ebfb8770025d97127d51359ace297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32df475a4f2164dcecfe1bd57fa4d51e.png)
A.点![]() ![]() | B.线段![]() ![]() |
C.点![]() | D.点![]() ![]() |
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【推荐2】如图,在棱长为
的正方体
中,
、
分别是棱
、
的中点,
是侧面
上一点,若
平面
,则线段
长度的取值范围是( )
![](https://img.xkw.com/dksih/QBM/2022/8/18/3047049409667072/3048092800737280/STEM/43de03eeeb2d4c8e8fef33a7b5592827.png?resizew=187)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24579dca7ff1542ae019fc36110dddbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://img.xkw.com/dksih/QBM/2022/8/18/3047049409667072/3048092800737280/STEM/43de03eeeb2d4c8e8fef33a7b5592827.png?resizew=187)
A.![]() | B.![]() | C.![]() | D.![]() |
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