2020高一·全国·专题练习
解题方法
1 . 如图所示,四边形ABCD是平行四边形,点P是平面ABCD外一点,M是PC的中点,在DM上取一点G,过G和AP作平面交平面BDM于GH.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dbb3aea5-bbea-47f1-8fa8-36586aafe50d.png?resizew=179)
求证:GH∥平面PAD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dbb3aea5-bbea-47f1-8fa8-36586aafe50d.png?resizew=179)
求证:GH∥平面PAD.
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解题方法
2 . 如图,在三棱柱,
中,侧面
是菱形,
是
中点,
平面
,平面
与棱
交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/85d44d5c-5305-43e7-91d5-9937e56708d4.png?resizew=168)
(1)求证:四边形
为平行四边形;
(2)若
与平面
所成角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4890e58791814622b87c4d60ea971f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1a1b7edecd3344707cf04ea3e86916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/85d44d5c-5305-43e7-91d5-9937e56708d4.png?resizew=168)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202794c51b2166eca170da9c53247bea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e108d5c61e85e0741ec2c484fc5768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c0fed1bec279a67db01c918711d4f5.png)
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2020-05-13更新
|
471次组卷
|
4卷引用:2020届山东省菏泽市高三联合模拟考试数学试题
2020届山东省菏泽市高三联合模拟考试数学试题(已下线)专题九 立体几何与空间向量-2020山东模拟题分类汇编(已下线)专题九 立体几何与空间向量-山东省2020二模汇编黑龙江省鹤岗市第一中学2022-2023学年高三上学期10月月考数学试题
3 . 如图,在四棱锥
中,
平面
,底面
是菱形,
,
,
,
为
与
的交点,
为棱
上一点.
![](https://img.xkw.com/dksih/QBM/2020/8/27/2536711217176576/2536736867942400/STEM/4975d3df-192f-4b8a-a64e-ba13d30ceb0c.png)
(1)证明:平面
平面
;
(2)若
平面
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36e2bb83427181e4cdb1bf38776be55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459372aa54090fcce9430a3cfa182f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2020/8/27/2536711217176576/2536736867942400/STEM/4975d3df-192f-4b8a-a64e-ba13d30ceb0c.png)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b999123e51b75bfeea6bee373e1677e9.png)
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2020-08-27更新
|
450次组卷
|
9卷引用:宁夏银川市宁大附中2020届高三第五次模拟考试数学(文)试题
宁夏银川市宁大附中2020届高三第五次模拟考试数学(文)试题甘肃省兰州市西北师大附中2020届6月高三诊断考试试卷文科数学试题(已下线)专题20+立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅱ专版)陕西省西安市周至县第二中学2020-2021学年高一上学期期末数学试题黑龙江省大庆市铁人中学2020-2021学年高一下学期期末数学试题甘肃省金昌市永昌县第一高级中学2021-2022学年高二下学期期末数学(文)试题(已下线)专题20 立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅱ专版)江西省丰城市第九中学、万载中学、宜春一中2022届高三上学期期末联考数学(文)试题陕西省延安市新区高级中学2021-2022学年高一上学期期末数学试题
解题方法
4 . 如图,在三棱柱
中,侧面
是矩形,平面
平面
,
是棱
上的一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/b2db8f3e-45b1-4e96-9f25-07bfe0d9405d.png?resizew=193)
(1)求证:
;
(2)若
是
的中点,且
平面
,求证:
是棱
中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c88d4954b9a1e1f3861ffa0dfef9cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/b2db8f3e-45b1-4e96-9f25-07bfe0d9405d.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736eca86008d535f03500d32ac00cd46.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa6d64d90b17044cb17ff3061420c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b4f16694b2bd79a1a93d776a82680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
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解题方法
5 . 如图,在三棱锥
中,侧面
是边长为2的等边三角形,
,
分别为
,
的中点,过
的平面与侧面
交于
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/dc05fc36-ffb9-43be-852b-b78ada4eff6f.png?resizew=185)
(1)求证:
;
(2)若平面
平面
,
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/dc05fc36-ffb9-43be-852b-b78ada4eff6f.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e928a9ffb945be8dba82a6f9c2c7294d.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4f0c1c9cca0555906d8a53e1a6803d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2020-09-16更新
|
1302次组卷
|
8卷引用:百师联盟2021届高三开学摸底联考新高考卷数学试题
百师联盟2021届高三开学摸底联考新高考卷数学试题百师联盟2021届高三开学摸底联考理科数学全国卷III试题百师联盟2021届高三开学摸底联考文科数学全国卷III试题福建省厦门第一中学2021届高三(10月月考)数学第一次质量检测试题(已下线)专题20 立体几何综合——2020年高考数学母题题源解密(山东、海南专版)(已下线)卷13 选择性必修第一册高二上期中考试 总复习检测4(中)-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)辽宁省朝阳市建平县2021-2022上学期高三上学期第一次联考数学试题江苏省苏州市高新区第一中学2021-2022学年高三上学期10月月考数学试题
名校
解题方法
6 . 图1是由边长为4的正六边形
,矩形
,组成的一个平面图形,将其沿
,
折起得几何体
,使得
,且平面
平面
,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/779dfc8f-2788-4134-8619-c39f6ba86204.png?resizew=442)
(1)证明:图2中,平面
平面
;
(2)设点M为图2中线段
上一点,且
,若直线
平面
,求图2中的直线
与平面
所成角的正弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148bbc00e06ef450a440c8590ceea6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6068867177d196e56c23e078476b7dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17d4a6cf11cda87b3dfafaecdec683f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c334350df9be155b169fc3784b08532b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad16260099de12b57de1e4e3e44acf53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/779dfc8f-2788-4134-8619-c39f6ba86204.png?resizew=442)
(1)证明:图2中,平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c46daeb77015e09c6044d89451fdba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ee01e28681b584f85c8875f053b77b.png)
(2)设点M为图2中线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee73d637e8260733851b10b322b9cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e2fef2c0e49ecae8688ca60802310e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f239fbcc58fc15535db4b5084c4f7253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdd615843adf3e011e5b72f9c608bfa.png)
您最近一年使用:0次
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7 . 如图,在四棱锥
中,平面
平面
,
是边长为2的等边三角形,底面
是菱形,且
,设平面
与平面
的交线为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/13f34229-c432-4343-a1b7-ebcb5b2cd781.png?resizew=215)
(1)证明:
;
(2)求平面
与平面
所成锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/13f34229-c432-4343-a1b7-ebcb5b2cd781.png?resizew=215)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672e57c6ab0c23d782a1ae1116106834.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2020-10-18更新
|
1184次组卷
|
2卷引用:山东师范大学附属中学2020-2021学年高三上学期第二次月考(10月)数学试题
名校
解题方法
8 . 如图,四棱锥
的底面是边长为4的正方形,四条侧棱长均为
.点
,
,
,
分别是棱
,
,
,
上共面的四点,平面
平面
,
平面
.
(1)证明:
;
(2)设
的中心为
,连接
,证明
平面
;
(3)若
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20838e72faf737614d76fcee82ab6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ecdaab3160da098a8f5ca525192bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963a91995abd4927d75406d16e10a81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74a1536fb7546c769cdf684181b8997.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29dd8914518df1e2c2899f7fbb00336d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2736c6f5b1436863983cf84cb3d27f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74a1536fb7546c769cdf684181b8997.png)
![](https://img.xkw.com/dksih/QBM/2020/8/12/2526491348049920/2529066759266304/STEM/d6f93c3c594d4b2a9f49282c5e01b068.png?resizew=210)
您最近一年使用:0次
名校
解题方法
9 . 如图,在四棱锥
中,底面
是平行四边形,
平面
,
是棱
上的一点,满足
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/1147598c-b995-4ba3-8bae-0bac67b22528.png?resizew=189)
(Ⅰ)证明:
;
(Ⅱ)设
,
,若
为棱
上一点,使得直线
与平面
所成角的大小为30°,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/1147598c-b995-4ba3-8bae-0bac67b22528.png?resizew=189)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec78c2154c5972efd438a6555afaf2d.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7794325335aa508186003c333e95ed5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb08a3eed3af2bdcb9d30e8b142de47f.png)
您最近一年使用:0次
2020-03-15更新
|
640次组卷
|
3卷引用:2020届内蒙古鄂尔多斯市第一中学高三下学期第一次模拟考试数学(理)试题