1 . 某三棱锥的三视图如图所示,则该三棱锥最长棱的长度为
![](https://img.xkw.com/dksih/QBM/2020/2/8/2394514861137920/2395411624894464/STEM/eda29fb001ca41219bc3436e08a9b6c8.png?resizew=354)
![](https://img.xkw.com/dksih/QBM/2020/2/8/2394514861137920/2395411624894464/STEM/eda29fb001ca41219bc3436e08a9b6c8.png?resizew=354)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知
是平面,
是直线,下列命题中不正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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名校
3 . 如图,在边长为2正方体
中,
为
的中点,点
在正方体表面上移动,且满足
,则点
和满足条件的所有点
构成的图形的面积是_______ .
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d3de94a397fd3c07a69f6875a18e6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/df6b0328-1086-4229-a8e9-a879345ba8bd.png?resizew=155)
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2019-09-07更新
|
1228次组卷
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7卷引用:北京市通州区2018-2019学年高二第二学期期末数学试题
4 . 设点
为
上任意一点,
垂直于
所在的平面,且
,对于
所在的平面内任意两条相互垂直的直线
,有下列结论:
①当直线
与
成
角时,
与
成
角;
②当直线
与
成
角时,AB与
成
角;
③直线
与
所成角的最小值为
;
④直线
与
所成角的最小值
为
.
其中正确结论的序号为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066a737ec107f72b7da74c7d717e5872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
①当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
②当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
④直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2019/9/2/2282055250231296/2285799515693057/STEM/696d0cd16388421eab8f29c6772c354c.png?resizew=2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
其中正确结论的序号为
A.① ③ | B.②④ | C.② ③ | D.① ④ |
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5 . 如图,网格纸上小正方形的边长为1,粗线画出的是某几何体的三视图,则此几何体的体积为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/3aa8c526-53e0-48d0-8237-d7ffd456092d.png?resizew=188)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/3aa8c526-53e0-48d0-8237-d7ffd456092d.png?resizew=188)
A.6 | B.9 |
C.12 | D.15 |
您最近一年使用:0次
2019-09-07更新
|
397次组卷
|
3卷引用:北京市通州区2018-2019学年高二第二学期期末数学试题
名校
6 . 在空间中,若直线
与
无公共点,则直线
的位置关系是________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
您最近一年使用:0次
2019-04-13更新
|
912次组卷
|
12卷引用:北京市通州区2019-2020学年高一(下)期末数学试题
北京市通州区2019-2020学年高一(下)期末数学试题江苏省清江中学2017-2018学年高二上学期期中考试数学试题上海市曹杨二中2018-2019学年高二上学期期末数学试题吉林省吉林市吉化一中2019-2020学年高一上学期第二次月考数学试题上海市闵行区2015-2016学年高二下学期期末数学试题(已下线)【新东方】新东方高二数学试卷302浙江省金华市东阳中学2020-2021学年高二上学期10月段考数学试题吉林油田高级中学2019-2020学年第二学期高一期末考试数学(理)试题四川省遂宁中学校2020-2021学年高二下学期第一次月考数学(文)试题四川省遂宁中学校2020-2021学年高二下学期第一次月考数学(理)试题沪教版(2020) 必修第三册 新课改一课一练 期中测试B上海市曹杨第二中学2023-2024学年高二上学期10月月考数学试题
7 . 如图,在三棱柱
中,
底面
,△ABC是边长为
的正三角形,
,D,E分别为AB,BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/0289f101-c4d2-478d-9fdf-637e2ad060e6.png?resizew=206)
(Ⅰ)求证:
平面
;
(Ⅱ)求二面角
的余弦值;
(Ⅲ)在线段
上是否存在一点M,使
平面
?说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326a3339175592bd1e793a9054d57fe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c47b3e7435856bedf495e1e859be631.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/0289f101-c4d2-478d-9fdf-637e2ad060e6.png?resizew=206)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28fa14d4841ca3f2fe226688c25c8160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d55f92fba01d16c84c9a6b48b64c14.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e406e7abcd86ecfa0c1aefbbaa9820a.png)
(Ⅲ)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846a84e40de724b4c60a20c4faa194b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce53ab3d9bdf2b266d6d5681e6c77bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a577bbf70ec85a95d1e077f9e29a9eef.png)
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8 . 直线
为参数
与曲线
为参数
的公共点的个数为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f74e7994b2ced0837665b6ea2ee9d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a7ceb68ea027d2baacd428a47baaf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
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9 . 某四棱锥的三视图如图所示,在此四棱锥的侧面中,面积最小的侧面面积为
![](https://img.xkw.com/dksih/QBM/2019/1/22/2124437011857408/2126900885626880/STEM/a3d6c04d0bdb45858c19e0584816719a.png?resizew=265)
![](https://img.xkw.com/dksih/QBM/2019/1/22/2124437011857408/2126900885626880/STEM/a3d6c04d0bdb45858c19e0584816719a.png?resizew=265)
A.1 | B.![]() | C.2 | D.![]() |
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10 . 如图,在正方体ABCD﹣A1B1C1D1中,点P在面对角线AC上运动,给出下列四个命题:
①D1P∥平面A1BC1;
②D1P⊥BD;
③平面PDB1⊥平面A1BC1;
④三棱锥A1﹣BPC1的体积不变.
则其中所有正确的命题的序号是_____ .
①D1P∥平面A1BC1;
②D1P⊥BD;
③平面PDB1⊥平面A1BC1;
④三棱锥A1﹣BPC1的体积不变.
则其中所有正确的命题的序号是
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095992765210624/2097427692191744/STEM/d4559c1f45b34c598cf5414bb48930b7.png?resizew=178)
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2018-12-15更新
|
578次组卷
|
3卷引用:北京市通州区2020-2021学年高一下学期期末数学试题