如图,在三棱锥
,
平面
,点E、F(E与A、D不重合)分别在棱
、
上,且
.则下列结论中:正确结论的序号是______ .①
平面
;②
;③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd8a97f37156cec6592795da3941f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c394c03f93a8ee828e61832bce6e56b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35333abd7f02d663d15251bc5cbbf921.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd8a97f37156cec6592795da3941f87.png)
![](https://img.xkw.com/dksih/QBM/2020/11/8/2588699300102144/2588745498755072/STEM/88724134-2f0c-414d-9b04-30b3ea3217be.png)
19-20高一·浙江杭州·期末 查看更多[1]
(已下线)【新东方】杭州新东方高中数学试卷331
更新时间:2020-11-08 21:59:06
|
相似题推荐
填空题-单空题
|
适中
(0.65)
名校
【推荐1】在正方体
中,点
,
满足
,
,给出下列4个命题:
![](https://img.xkw.com/dksih/QBM/2021/11/8/2847094571835392/2847356345024512/STEM/fa726ef76df843c1b1b8a205f774df16.png?resizew=153)
①存在
,使
;
②存在
,使直线
与直线
共面;
③任意
,
的面积为定值;
④任意
,均有
.
其中,正确命题的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11819586164b4c8c61fc01199c65327a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6db8a3fe1c37e9eee6207541f9347d.png)
![](https://img.xkw.com/dksih/QBM/2021/11/8/2847094571835392/2847356345024512/STEM/fa726ef76df843c1b1b8a205f774df16.png?resizew=153)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ee20f80fb0a9524662ce03f48e8157.png)
②存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24006d28116bc097933cc90bcc0ea69f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
③任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
④任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99146aec0102a510f2357b7013e2d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142c742a4226a2a6873bd55ca8b1f021.png)
其中,正确命题的序号为
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
【推荐2】给出下列4个命题:
①过平面外一点,与该平面成
角的直线一定有无穷多条;
②一条直线与两个相交平面都平行,则它必与这两个平面的交线平行;
③过空间任意一点有且只有一个平面与两条异面直线都平行;
④与确定的两条异面直线所成的角相等的平面有无数个.
其中正确命题的序号有_____ (请把所有正确的序号都填上).
①过平面外一点,与该平面成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
②一条直线与两个相交平面都平行,则它必与这两个平面的交线平行;
③过空间任意一点有且只有一个平面与两条异面直线都平行;
④与确定的两条异面直线所成的角相等的平面有无数个.
其中正确命题的序号有
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐3】将边长为
,锐角为
的菱形
沿较短对角线
折成四面体
,点
分别为
的中点,则下列命题中正确的是__________ .(将正确的命题序号全填上)
①
;②
是异面直线
与
的公垂线;③
平面
;④
垂直于截面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed073c6918d6bfbcadd5e4b90ee050e.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d3f076d3f5a78fc081c252e9a55d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在正方体
中,点F是棱
上的一个动点,平面
交棱
于点E,则下列正确说法的序号是___________ .
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975700215357440/2976460194693120/STEM/9bff69cf-bf9a-4058-b628-46ffb165bbbb.png?resizew=152)
①存在点F使得
平面
;
②存在点F使得
平面
;
③对于任意的点F,都有
;
④对于任意的点F三棱锥
的体积均不变.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c241f900cb6ed341c137a3d71216a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975700215357440/2976460194693120/STEM/9bff69cf-bf9a-4058-b628-46ffb165bbbb.png?resizew=152)
①存在点F使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb96d9ea39bf7974143973559058dbec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6069dc466eec75bbeb3d5c9b51cb3a70.png)
②存在点F使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/390c15e3a73978e982688bbc8db12fbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6069dc466eec75bbeb3d5c9b51cb3a70.png)
③对于任意的点F,都有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c672f693a7e75a7bae4936dcb1920430.png)
④对于任意的点F三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97d99e8ae873d2dcaf0593a3287506c.png)
您最近一年使用:0次
填空题-单空题
|
适中
(0.65)
解题方法
【推荐2】已知直角三角形ABC中,
,
,P是三角形ABC所在平面外一点,
平面ABC,PB与平面ABC所成角为45°,则∠BPC的大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabecf66d94e4094f9cc46fd8ee050f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
您最近一年使用:0次