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1 . “石龙对石虎,金银万万五,谁能识得破,买进成都府”.这个民谣在彭山地区流传了三百多年,2020年彭山江口沉银遗址水下考古取得重大突破,出水文物超过10000件,实证确认了“张献忠江口沉银”以及“木鞘藏金”的传说“木鞘藏金”指的是可视为圆柱的木料内放置了一个可视为球体的金疙瘩,这个金疙瘩与木料的底面和侧面都相切,则这个金疙瘩的体积与该木鞘(这个圆柱体)的体积之比为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:四川省成都市实验外国语学校2022-2023学年高一下学期期末数学试题
2 . 某种冰淇淋是用球形塑料壳包装的,有80g装和200g装的两种规格,假设冰淇淋售价=(冰淇淋成本+包装成本)×(1+利润率),并且包装成本与球形外壳表面积成正比.已知80g装冰淇淋售价是1.50元,其中冰淇淋成本为每克1分,利润率为
,则在利润率不变的情况下,200g装冰淇淋售价是__________ 元.(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1a99cda8d5479bf7dcad4ada2b0b411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892b18d77c062285bba4b1c3ae6ccb1d.png)
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3 . 如图,
,
分别是圆台上下底面的圆心,
是下底面圆的直径,
,点
是下底面内以
为直径的圆上的一个动点(点
不在
上).
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720310018605056/2720901185110016/STEM/4ef06bd6-47d9-485d-919c-6f787b33f55c.png?resizew=286)
(Ⅰ)求证:平面
平面
;
(Ⅱ)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d40a9e1d9a88d1045731e8dbc16b78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6973bc602348065901b58bb1b4e6bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6973bc602348065901b58bb1b4e6bb3.png)
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720310018605056/2720901185110016/STEM/4ef06bd6-47d9-485d-919c-6f787b33f55c.png?resizew=286)
(Ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b53e60ab704a67ecabda3d3166a59a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4ea944027f8d8edcdf305c41f36c1f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9849ca2978032a5af95c7f9ce419b594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bab906d4fc26acb1a7f681a3bb2981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaed3f5ee2d7e2831a695d0953fb9567.png)
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10卷引用:四川省泸州市泸县第四中学2022-2023学年高三下学期第二次诊断性模拟考试数学(理)试题
四川省泸州市泸县第四中学2022-2023学年高三下学期第二次诊断性模拟考试数学(理)试题四川省成都玉林中学2023届高三下学期二诊考试理科数学模拟试题四川省泸县第四中学2023届高三第二次诊断性模拟考试数学(理科)试题四川省绵阳南山中学2023届高三下学期高考热身考试理科数学试题山西省太原市2021届高三三模数学(理)试题江苏省南京市金陵中学2021-2022学年高三上学期学情检测考前热身数学试题(已下线)一轮复习大题专练54—立体几何(二面角3)-2022届高三数学一轮复习黑龙江省佳木斯市第二中学2021-2022学年高三第三次月考数学(理)试题江苏省宿迁市泗阳县实验高级中学2021-2022学年高二下学期第一次月考数学试题上海市高桥中学2023届高三上学期9月月考数学试题
4 . 已知三棱柱
,
面
,
为
内的一点(含边界),且
为边长为2的等边三角形,
,
、
分别为
、
的中点,下列命题正确的有______ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/b0c95145-f581-4f14-b5ea-0e2d92175657.png?resizew=187)
①若
为
的中点时,则过
、
、
三点的平面截三棱柱表面的图形为等腰梯形;
②若
为
的中点时,三棱锥
的体积
;
③若
为
的中点时,
;
④若
与平面
所成的角与
的二面角相等,则满足条件的
的轨迹是椭圆的一部分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ced1d47b8244d17b506f9b9fff85fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146f8c5491f5c6226f67b20f1e340320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04a2f09a6d56ce328f0fa843ef8fa89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc8fb75e1e8510448e569d865bd98a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ff9d4fdd0d176042505b7aac016852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e4270e65d0e32556fa14fcd55fa1da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bcdd8c05cd04f46c6f4ba8aa3cb1d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad135b14c9dcd83eab6618d7694c7b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82d6b83a5dc6b15f3d5feff1a2d73faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fcb360984721a5600d426949ccdb14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/b0c95145-f581-4f14-b5ea-0e2d92175657.png?resizew=187)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c27eda162792128da25f541303a3088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745bb2828e2ef0ae89cf33ae00ceea59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745bb2828e2ef0ae89cf33ae00ceea59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbe7a5a0f1e0d33eb373c2f56bd4ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd787f68f292ee0f4dae976fcd72ddd6.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745bb2828e2ef0ae89cf33ae00ceea59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10328529578117dfdbb91c96ed2ce40.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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4卷引用:四川省凉山州2021届高三二模数学(文科)试题
5 . 有一个装有水且底面直径为12cm的圆柱形容器,水面与容器口的距离为
cm.现往容器中放入一个半径为r(单位:cm)的小球,该小球放入水中后直接沉入容器底部,若使该容器内的水不溢出,则小球半径r的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
A.1 | B.2 | C.3 | D.4 |
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4卷引用:四川省巴中市恩阳区2021-2022学年高二上学期期中考试数学试题
四川省巴中市恩阳区2021-2022学年高二上学期期中考试数学试题湖南省永州市2021届高三下学期三模数学试题(已下线)第3题 单选题中空间几何体元素的数量关系-2021年高考数学真题逐题揭秘与以例及类(新高考全国Ⅰ卷)湖南省株洲市第一中学2022届高三上学期期末数学测试卷
6 . 图1中的机械设备叫做“转子发动机”,其核心零部件之一的转子形状是“曲侧面三棱柱”,图2是一个曲侧面三棱柱,它的侧棱垂直于底面,底面是“莱洛三角形”,莱洛三角形是以正三角形的三个顶点为圆心,正三角形的边长为半径画圆弧得到的,如图3.若曲侧面三棱柱的高为10,底面任意两顶点之间的距离为20,则其侧面积为( )
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712183899488256/2712224098320384/STEM/5d769bbfd1b74aef97963609fb6f4d1a.png?resizew=360)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712183899488256/2712224098320384/STEM/5d769bbfd1b74aef97963609fb6f4d1a.png?resizew=360)
A.![]() | B.600 | C.![]() | D.![]() |
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3卷引用:四川省内江市资中县第二中学2022-2023学年高二下学期入学考试数学(理)试题
7 . 如图(1),平面四边形
中,
,
,
,将
沿
边折起如图(2),使________,点
,
分别为
,
中点.在题目横线上选择下述其中一个条件,然后解答此题.①
.②
为四面体
外接球的直径.③平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708173069008896/2710350918230016/STEM/1fe61260-ca66-4348-a818-c0c4e41ee4b1.png?resizew=447)
(1)判断直线
与平面
的位置关系,并说明理由;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81939c1f23fa5fb48a3a270bbf52d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037b342a682cbd4241855a243da3c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7650cede07c4758a9b3bb1da4553acc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520f8abda6a85e7ef6f281fc2df853fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/2021/4/26/2708173069008896/2710350918230016/STEM/1fe61260-ca66-4348-a818-c0c4e41ee4b1.png?resizew=447)
(1)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e82346a63d015b21ee11cbcd025c682.png)
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6卷引用:四川省泸州市泸县第二中学2022届高三上学期第四学月考试数学(文)试题
四川省泸州市泸县第二中学2022届高三上学期第四学月考试数学(文)试题四川省射洪中学校2022-2023学年高二上学期1月月考数学(文)试题慕华优策联考2021届高三第三次联考文科数学试卷(已下线)押新高考第19题 立体几何-备战2021年高考数学临考题号押题(新高考专用)江苏省淮安市六校联盟2020-2021学年高一下学期第七次学情调查数学试题(已下线)押新高考第19题 立体几何-备战2022年高考数学临考题号押题(新高考专用)
名校
8 . 如图,正方体
中,点
,
是
上的两个三等分点,点
,
是
上的两个三等分点,点
,
,
分别为
,
和
的中点,点
是
上的一个动点,下面结论中正确的是___________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1b7863af-c10b-4615-88d2-f0ace81ee153.png?resizew=170)
①
与
异面且垂直;
②
与
相交且垂直;
③
平面
;
④
,
,
,
四点共面.
![](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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/1b7863af-c10b-4615-88d2-f0ace81ee153.png?resizew=170)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fada3d4674aa1e2ea349a053942212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecf35bb2453db07d66391f501fa7a1a.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8346fe1768259532eab949b0ac52c79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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4卷引用:四川省绵阳市2021届高三三模数学(理)试题
四川省绵阳市2021届高三三模数学(理)试题四川省泸县第一中学2023届高三二诊模拟考试数学(理)试题(已下线)押第16题 立体几何综合-备战2021年高考数学(理)临考题号押题(全国卷2)(已下线)解密12 空间向量在空间几何体中应用(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(新高考专用)
20-21高一·全国·课后作业
9 . 已知平面
平面
,
,
,且直线
与
不平行.记平面
、
的距离为
,直线
、
的距离为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60be170a52db82cf37b30db0cde26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539a38ada26356d73024fb8533449c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209323a7a4d015f7e570ec578c1731f7.png)
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