1 . 某校高一(1)班有30名男生和20名女生,采用分层随机抽样的方法从中抽取10名学生进行学习习惯调查,则抽取的男生人数为 ( )
A.2 | B.3 | C.4 | D.6 |
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2 . 投掷两枚质地均匀的骰子,则向上的点数之和为11的概率是( )
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 设
是两个不同的平面,
是两条不同的直线,下列命题中真命题的个数是( )
(1)若
,则
;
(2)若
,则
;
(3)若
,则
;
(4)若
,
,则
;
(5)若
,
,
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85412e0569fef68744f32f3fc084b9fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a59cb61d21ac9da8940ed8e18c50a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a4c549e7ea8776ec821c467bc1a913.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ed0b3904c9853f2e97bfb1c8501fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80645381feb9746cc149da61d553974a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428d3f3dd5edace9275b07da6b8ca482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0d37b44de48de51555fa95d94e33f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
(5)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe920cd78db25f5b4df37d066e57800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53cd751c44ad4d9ebd8e3243e751321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
A.1 | B.2 | C.3 | D.4 |
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解题方法
4 . 如图,已知长方体
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac7d13b959d8b71927121eb529da41b.png)
,点E是
的中点,则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/2023/6/29/3270194410397696/3274676413661184/STEM/4163071004c64c7289a3d472ed49fc95.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac7d13b959d8b71927121eb529da41b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2023/6/29/3270194410397696/3274676413661184/STEM/4163071004c64c7289a3d472ed49fc95.png?resizew=111)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 设
为虚数单位,已知复数
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579743813856e2a9183f5ec6eaaefbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc933d8e17ad3edfe04a3d4a2d0716d.png)
A.![]() ![]() |
B.![]() |
C.![]() ![]() |
D.![]() |
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6 . 若向量
与
垂直,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b6e99d71eaa7784dab1e3808a2ad4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d889e501d7c2eaa7d96c80989c242e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.-4 | B.4 | C.-9 | D.9 |
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7 . 在
中,内角
所对的边长分别是
,
.
(1)若
,求c;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86affd0730e8430d59ff49c930b8e2d9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e207b2baf056a7d6a6bde1f23bf12bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
8 . 为了落实习主席提出“绿水青山就是金山银山”的环境治理要求,长寿区政府积极鼓励居民节约用水.计划调整居民生活用水收费方案,拟确定一个合理的月用水量标准x(吨),一位居民的月用水量不超过x的部分按平价收费,超出x的部分按议价收费.为了了解居民用水情况,通过抽样,获得了某年200位居民每人的月均用水量(单位:吨),将数据按照[0,1),[1,2),⋯,[8,9]分成9组,制成了如图所示的频率分布直方图.
(1)直方图中a的值;
(2)由频率分布直方图估计长寿区居民月用水量的平均数是多少?(每组数据用该组区间中点值作为代表);
(3)若长寿区政府希望使
的居民每月的用水量不超过标准
(吨),求
的估计值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/6cb3fb62-7005-489b-b976-14fb6da2fe49.png?resizew=284)
(1)直方图中a的值;
(2)由频率分布直方图估计长寿区居民月用水量的平均数是多少?(每组数据用该组区间中点值作为代表);
(3)若长寿区政府希望使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354484062fc9b6d3d9beb0dfa7a5c1af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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9 . 已知向量
在平面直角坐标系中的位置如图所示.若网格中每个小正方形的边长均为1,则向量
在向量
方向上的投影向量的坐标为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e8b95a61af300412fc65f846089028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/6a8b6651-452e-465a-8186-1e357e8c5aa4.png?resizew=169)
您最近一年使用:0次
名校
解题方法
10 . 如图,在棱长为2的正方体
中,点
分别为棱
的中点, 求证:
(1)
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631a833b17c2071f6c3add54d8eaefde.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/4bb36650-59f3-4d5e-befa-ecaa0ba0b88d.png?resizew=156)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee076fe7dbca5616c4e8a6869a355f4.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f73a0ca4e6c794242489066fddb6c5.png)
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2023-07-06更新
|
512次组卷
|
2卷引用:重庆市长寿区2022-2023学年高一下学期期末数学试题(B卷)