名校
解题方法
1 . 已知
、
分别是正方体
的棱
、
的中点,求:
(1)
与
所成角的大小;
(2)二面角
的大小;
(3)点
在棱
上,若
与平面
所成角的正弦值为
,请判断点
的位置,并说明理由.
![](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/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/272cab81-ee03-427b-8075-168f579977ce.png?resizew=142)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d945b178e6db6fa78e3fe5610b2d39.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9961e091f180e964a962adf6916f33c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffb71379c2a28a42f454ec4f3cf01a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2023-06-20更新
|
646次组卷
|
6卷引用:上海大学附属中学2023-2024学年高二上学期9月月考数学试题
上海大学附属中学2023-2024学年高二上学期9月月考数学试题上海市宝山区上海师大附属宝山罗店中学2023-2024学年高二下学期第一次诊断性测试(3月)数学试卷上海市宝山区2022-2023学年高二下学期期末数学试题上海市复兴高级中学2023-2024学年高二上学期期中数学试题(已下线)第11讲 用空间向量研究距离、夹角问题11种常见考法归类-【暑假自学课】2023年新高二数学暑假精品课(人教A版2019选择性必修第一册)(已下线)专题1.6 空间角的向量求法大题专项训练(30道)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)
名校
解题方法
2 . 如图,在三棱柱
中,
平面ABC,
,
,
,点D,E分别在棱
和棱
上,且
,
,M为棱
的中点.
(1)求证:
;
(2)求直线AB与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209acf15985d1ea1ad86fc4a37e38c0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c122ca7141c43c15c783968f5f0dbc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/25/97a086b1-35a9-4ac9-8bff-e043dddff2c1.png?resizew=141)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8973bcb7d87303a0b5fba04a801019b9.png)
(2)求直线AB与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa279d85f7cb724fc05fe2917b3b8f8c.png)
您最近一年使用:0次
2023-05-24更新
|
1044次组卷
|
20卷引用:上海市行知中学2021-2022学年高二下学期3月月考数学试题
上海市行知中学2021-2022学年高二下学期3月月考数学试题重庆市第八中学校2021-2022学年高二艺术班下学期第二次月考数学试题上海市奉贤中学2021-2022学年高二下学期期末数学试题广西玉林市第十一中学2023-2024学年高二上学期10月月考数学试题河南省新乡市长垣市第一中学2023-2024学年高三上学期10月月考数学试题黑龙江省双鸭山市第一中学2021-2022学年高二上学期期中数学试题广东省惠州市2021-2022学年高二上学期期末数学试题黑龙江省五校2021-2022学年高二上学期期末联考数学试题黑龙江省大庆市东风中学2021-2022学年高二下学期开学考试数学试题广东省深圳市第七高级中学2021-2022学年高二上学期期末数学试题甘肃省武威市古浪县第二中学2021-2022学年高二上学期期末考试数学(理)试题(已下线)海南省华东师范大学第二附属中学乐东黄流中学2022-2023学年高二上学期12月教学质量监测(期末)数学试题黑龙江省七台河市勃利县高级中学2022-2023学年高二上学期期末考试数学试题四川省南充高级中学2022-2023学年高二上学期期末考试数学(理科)试题广东省湛江市第二十一中学2022-2023学年高二下学期期中数学试题广西南宁市第三中学2022-2023学年高二下学期期末考试试题(已下线)模块三 专题4 空间向量的应用1直线与平面的夹角、二面角 B能力卷(已下线)模块三 专题5 直线与平面的夹角、二面角 B能力卷 (人教B)天津市滨海新区实验中学滨海学校2024届高三上学期期中质量调查数学试题(已下线)通关练04 空间向量与立体几何大题9考点精练(41题)- 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
名校
解题方法
3 . 如图所示,已知正方体
,
,
分别是正方形
和
的中心,则
和
所成的角是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/f7410752-b1cd-4ccc-ad1c-2b67673baad9.png?resizew=163)
![](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/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/f7410752-b1cd-4ccc-ad1c-2b67673baad9.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-04-27更新
|
543次组卷
|
7卷引用:上海市行知中学2022-2023学年高二下学期5月月考数学试题
上海市行知中学2022-2023学年高二下学期5月月考数学试题上海市吴淞中学2022-2023学年高二下学期5月月考数学试题四川省绵阳南山中学2021-2022学年高二下学期4月月中评估(理科)数学试题四川省广元中学2023-2024学年高二上学期第一次阶段性测试(10月)数学试题内蒙古自治区通辽市科尔沁左翼中旗实验高级中学2022-2023学年高一下学期期中数学试题(已下线)第11讲 用空间向量研究距离、夹角问题11种常见考法归类-【暑假自学课】2023年新高二数学暑假精品课(人教A版2019选择性必修第一册)(已下线)第07讲 拓展一:异面直线所成角(传统法与向量法,5类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)
名校
解题方法
4 . 四边形
是边长为1的正方形,
与
交于
点,
平面
,且二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/662676a7-4f5f-4e81-ae57-e62a7c32acdc.png?resizew=160)
(1)求点
到平面
的距离;
(2)求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/662676a7-4f5f-4e81-ae57-e62a7c32acdc.png?resizew=160)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-04-06更新
|
713次组卷
|
4卷引用:上海市青浦高级中学2023-2024学年高二上学期12月质量检测数学试卷
名校
5 . 如图,已知直三棱柱
中,
且
,
、
、
分别为
、
、
的中点,
为线段
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/d7a4e86e-30b3-4222-90eb-8c718300db26.png?resizew=158)
(1)求
与平面
所成角的正切值;
(2)证明:
;
(3)求锐二面角
的余弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a9ad711b25c36dae0c2a2cedff9954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b51da47ab8433342f7a319e412fefae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/d7a4e86e-30b3-4222-90eb-8c718300db26.png?resizew=158)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456175ea34492f0bc025aaab668fa659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8b1a2760333f3d6f6d456881115498.png)
(3)求锐二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d9892555bfe67259e3e5a1fff78976.png)
您最近一年使用:0次
2023-03-11更新
|
470次组卷
|
3卷引用:上海市徐汇区2022-2023学年高二下学期3月月考数学试题
名校
解题方法
6 . 如图,在长方体
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/c47e2aa4-c85a-452e-9de2-ecb4301be8a2.png?resizew=123)
(1)求异面直线
与
所成角的余弦值;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4362edfc026266c5d29b3f90df374e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5e1093a147c521c5e8d0d5e266db54.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/c47e2aa4-c85a-452e-9de2-ecb4301be8a2.png?resizew=123)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
您最近一年使用:0次
2023-02-25更新
|
143次组卷
|
3卷引用:上海市奉贤区致远高级中学2022-2023学年高二下学期3月教学评估数学试题
名校
7 . 如图,在正三棱柱
中,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/d35717d7-88cb-4dfd-a964-4d6986d9d191.png?resizew=153)
(1)证明:
平面
;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cfb38323095090b0fe5eee70b24210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/d35717d7-88cb-4dfd-a964-4d6986d9d191.png?resizew=153)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec47f6d6cb1eeefbb466e4fe71fd568c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
您最近一年使用:0次
2023-02-21更新
|
860次组卷
|
4卷引用:上海师范大学附属中学2024届高三上学期9月月考数学试题
名校
解题方法
8 . 如图,该几何体由半圆柱体与直三棱柱构成,半圆柱体底面直径
,
,
为半圆弧
的中点.若异面直线
和
所成角的大小为
,求:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/21/ab6e098c-6b9b-4cf2-ad47-79c8ac9b8488.png?resizew=155)
(1)该几何体的体积;
(2)直线
和
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c2ef71706ae8f5c69c7205adf0d3aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/178a27068cf5517ad64f211af10256ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/21/ab6e098c-6b9b-4cf2-ad47-79c8ac9b8488.png?resizew=155)
(1)该几何体的体积;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
名校
9 . 如图,在四棱柱
中,侧棱
底面
,
,
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223036d27be5914db50fbd5cb19d4212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b377f632949bff36083a5464113387fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/41df7655-23a4-44d1-b7cc-5b525ad38bcd.png?resizew=193)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)若直线
与平面
所成角的正弦值为
,求
的值
(3)现将与四棱柱
形状和大小完全相同的两个四棱柱拼成一个新的四棱柱,规定:若拼成的新四棱柱形状和大小完全相同,则视为同一种拼接方案,问共有几种不同的拼接方案?在这些拼接成的新四棱柱中,记其中最小的表面积为
,写出
的解析式.(直接写出答案,不必说明理由).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b9740124a284f336f20c98695af04ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5cab760038d20eac10fe6108fbb334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f991c5086ba855802b0331c4e02e3f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223036d27be5914db50fbd5cb19d4212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b377f632949bff36083a5464113387fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/41df7655-23a4-44d1-b7cc-5b525ad38bcd.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4e6eb3663870ed202cc208eaf239dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)现将与四棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6cb8d4e39fa44f71df04b74f123f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e6cb8d4e39fa44f71df04b74f123f4.png)
您最近一年使用:0次
解题方法
10 . 如图,在四棱锥V-ABCD中,底面ABCD是矩形,侧棱
底面ABCD,E、F、G分别为VA、VB、BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/319696e9-38b5-4287-850a-d7bed049f305.png?resizew=182)
(1)求证:平面
平面VCD;
(2)当二面角V-BC-A、V-DC-A分别为45°、30°时,求直线VB与平面EFG所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c439e4e4e48b17e19e666d892216fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/16/319696e9-38b5-4287-850a-d7bed049f305.png?resizew=182)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de26c3f532386379ef028cd4e59d12a1.png)
(2)当二面角V-BC-A、V-DC-A分别为45°、30°时,求直线VB与平面EFG所成的角.
您最近一年使用:0次
2023-01-12更新
|
255次组卷
|
2卷引用:上海市第十中学2022-2023学年高二上学期12月月考数学试题