名校
解题方法
1 . 某正四棱锥的侧棱与底面所成的角为
,则该正四棱锥的一个侧面与底面的面积之比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:山西省运城市2021届高三下学期高考模拟(5月)数学(理)试题
山西省运城市2021届高三下学期高考模拟(5月)数学(理)试题(已下线)7.3 空间几何体积及表面积(精讲)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)黑龙江省牡丹江市第三高级中学2023-2024学年高二上学期期末数学试题
名校
解题方法
2 . 大摆锤是一种大型游乐设备(如图),游客坐在圆形的座舱中,面向外,通常大摆锤以压肩作为安全束缚,配以安全带作为二次保险,座舱旋转的同时,悬挂座舱的主轴在电机的驱动下做单摆运动.假设小明坐在点
处,“大摆锤”启动后,主轴
在平面
内绕点
左右摆动,平面
与水平地面垂直,
摆动的过程中,点
在平面
内绕点
做圆周运动,并且始终保持
,
.设
,在“大摆锤”启动后,下列结论错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/e7960b1a-fe97-4314-afb2-5be698216bc4.png?resizew=247)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a79ef827360981a3cbcbf5808ee5db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16acea101c98a280a70c2fa0b2c04dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34795a1bf33347bdbc093802e1be6b9a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/e7960b1a-fe97-4314-afb2-5be698216bc4.png?resizew=247)
A.点![]() |
B.![]() ![]() ![]() ![]() ![]() |
C.可能在某个时刻,![]() |
D.直线![]() ![]() ![]() |
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2020-12-02更新
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6卷引用:山西省运城市高中联合体2021届高三下学期4月模拟数学(文)数学试题
山西省运城市高中联合体2021届高三下学期4月模拟数学(文)数学试题福建省厦门集美中学2021届高三12月适应性考试数学试题湖南省湖湘名校教育联合体2021届高三入学考试数学试题广东省中山市2021届高三上学期期末数学试题甘肃省白银市第十中学2020-2021学年高二上学期期末考试数学(理)试题(已下线)卷03 空间向量与立体几何-单元检测(难)-2021-2022学年高二数学单元卷模拟(易中难)(2019人教A版选择性必修第一册+第二册)
3 . 如图,三棱锥
中,
平面
,
,
分别在棱
上,且
于
,
于
,则下列说法正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/654beaf7-4b38-4755-92c8-5355d9e25748.png?resizew=196)
①
是直角
②
是异面直线
与
所成角
③
是直线
与平面
所成角
④
是二面角
的平面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97bde5efa645a4c1ed6874088400d6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d0c688e55286443c9974797fc647f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/654beaf7-4b38-4755-92c8-5355d9e25748.png?resizew=196)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29cc627d76412c236aac6b29fa0fdf.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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2020-01-20更新
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