解题方法
1 . 如题图,
为圆锥的顶点,
是圆锥底面的圆心,
是底面的内接正三角形.
为
上一点,
.
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146432864067584/3146801961656320/STEM/d73d6cd919bb48b6a5fe46ad4be3fa76.png?resizew=150)
(1)求证:
平面
;
(2)若
,圆锥的侧面积为
.求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a665ba024f2840ce5aef3765249341.png)
![](https://img.xkw.com/dksih/QBM/2023/1/5/3146432864067584/3146801961656320/STEM/d73d6cd919bb48b6a5fe46ad4be3fa76.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6fe14910a40072b76a1385efd289795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e251c2fe791c539437c4d62183b85f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
2023-01-06更新
|
274次组卷
|
2卷引用:贵州省贵阳市五校2023届高三联合考试(四)数学(文)试题
名校
解题方法
2 . 如图,四棱锥
中,
,
,
,
平面CDP,E为PC中点.
![](https://img.xkw.com/dksih/QBM/2022/2/11/2914373244076032/2934040094711808/STEM/20817f34-ee53-4390-8cef-3d847e3b53ac.png?resizew=200)
(1)证明:
平面PAD;
(2)若
平面PAD,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://img.xkw.com/dksih/QBM/2022/2/11/2914373244076032/2934040094711808/STEM/20817f34-ee53-4390-8cef-3d847e3b53ac.png?resizew=200)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137fcdac119eff6ac5990b6d201615df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245440d3761fb4217eaa8dc303fa288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e76d46719c1c1f0fe0a394872c20c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b672ffa6271d658873780ba1ae5e21.png)
您最近一年使用:0次
2022-03-11更新
|
661次组卷
|
4卷引用:贵州省毕节市2022届高三下学期诊断性考试(二)数学(文)试题
名校
解题方法
3 . 如图,
平面
,
平面
,
,
,且
均在平面
的同侧.
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931198018387968/2932300590637056/STEM/cf54a3e6c6f74f75b53d848490bd905f.png?resizew=190)
(1)证明:平面
平面
.
(2)若四边形
为梯形,
,且异面直线
与
所成角的余弦值为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1089f40864a8ec79bf544ab7ff1cc43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86325f55e83254a6e16c35d91590f8b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931198018387968/2932300590637056/STEM/cf54a3e6c6f74f75b53d848490bd905f.png?resizew=190)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e7a3d6eadcf4e7be0c6ba280c11c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65741c0b231a6fd479d3d1da8c87b861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5ba482836565abad208665cf7b9972.png)
您最近一年使用:0次
2022-03-09更新
|
1031次组卷
|
5卷引用:贵州省黔东南州2022届高三一模考试数学(理)试题
贵州省黔东南州2022届高三一模考试数学(理)试题河南省名校联盟2021-2022学年高三下学期3月大联考理科数学试题河北省部分名校(唐县第一中学等)2022届高三下学期3月联考数学试题广东省2022届高三下学期3月大联考数学试题(已下线)专题20 平行垂直与空间向量在立体几何中的应用-2022届高考数学一模试题分类汇编(新高考卷)
名校
解题方法
4 . 如图,在四棱锥
中,底面
是矩形,
平面
,
为垂足.
在线段
上移动时,判断
是否为直角三角形,并说明理由;
(2)若
,当点
是
的中点,且
时,求三棱锥
的体积.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1597af5a4405ce68f5a97c87de4df7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d03c2639a3b3f1f9590080b38ab21374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b24136c688c1dcb489dd67da5154d3.png)
您最近一年使用:0次
2022-02-22更新
|
322次组卷
|
2卷引用:贵州省贵阳市普通中学2022届高三上学期期末监测考试数学(文)试题
解题方法
5 . 如图,在四棱锥
中,
平面ABCD,
,
,且
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899259120918528/2916096735936512/STEM/597d1d4935b0431cb91680aabc8c6a93.png?resizew=278)
(1)求证:
平面PAC;
(2)已知点M是线段PD上的一点,且
,当三棱锥
的体积为1时,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e0b7d845cbceccd3e76ca461fcc534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899259120918528/2916096735936512/STEM/597d1d4935b0431cb91680aabc8c6a93.png?resizew=278)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
(2)已知点M是线段PD上的一点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c666f8d7a2765eb0063a4e23ab6ae0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f4ff060b8b0617d0c41cc164d14029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2022-02-14更新
|
320次组卷
|
3卷引用:贵州省黔西南州兴义市顶效开发区顶兴学校2022-2023学年高一下学期期中考试数学试题
名校
解题方法
6 . 如图,在四棱锥
中,四边形
是矩形,平面
平面
,点E,F分别为
、
的中点.
(1)求证:
平面
;
(2)若
,求三棱锥
的体积.
![](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/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/66831cb6-94e7-41c0-a792-1ab136afb958.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c159d0c7cd88a41801ccbbd8e42f6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
您最近一年使用:0次
2023-08-01更新
|
228次组卷
|
13卷引用:贵州省黔东南州2018届高三下学期第二次模拟考试数学(文)试题
贵州省黔东南州2018届高三下学期第二次模拟考试数学(文)试题贵州省思南中学2018-2019学年高二下学期期末数学(文)试题【全国百强校】湖南省长郡中学2018届高三下学期第一次模拟考试数学(文)试题【全国百强校】四川省双流县棠湖中学2017-2018学年高二下学期期末考试数学(文)试题【全国校级联考】广东省(宝安中学、 潮阳一中、桂城中学、南海中学、普宁市第二中学、中山中学、仲元中学)2018届高三5月七校高考冲刺交流数学(文)试题辽宁省六校协作体2019-2020学年高三上学期开学考试数学(文)试卷2019年四川省仁寿一中等西南四省八校高三9月份联考数学(文)试题湖南师大附中2020届高三下学期月考(七)数学(文)试题(已下线)专题8.4 直线、平面平行的判定及性质(精练)-2021年高考数学(文)一轮复习讲练测山西省山西大学附属中学2020-2021学年高二上学期期中数学(文)试题山西省太原市山西大学附属中学2020-2021学年高二上学期模块诊断数学试题云南省昆明行知中学2022-2023学年高一下学期期末模拟拉练三数学试题山东省烟台第一中学2023-2024学年高二下学期2月月考数学试题
名校
解题方法
7 . 在四棱锥
中,底面
是直角梯形,
,
,
,
分别是棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899231840321536/2902340650344448/STEM/e33bb52e-b185-4986-8bd7-1801e37e071c.png?resizew=215)
(1)证明:
平面
;
(2)若
,且四棱锥
的体积是6,求三棱锥
的体积.
![](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/d730ae4307db56b47849c3a19dedfb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899231840321536/2902340650344448/STEM/e33bb52e-b185-4986-8bd7-1801e37e071c.png?resizew=215)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84094aedc798143d465276916c1b9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f09d555c9022f7546fe4a678b599376.png)
您最近一年使用:0次
2022-01-25更新
|
515次组卷
|
7卷引用:贵州省名校联盟2022届高三上学期期末数学(文)试题
名校
解题方法
8 . 如图,已知直三棱柱
,
,
,
,
,E,F是
和
上的两点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/35566a96-31ea-4577-af35-18e15660447f.png?resizew=153)
(1)证明:B,C,E,F四点共面;
(2)求点A到平面BCE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c35cd5ec4aab04a2cbc6bc72cb06481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb04497a6cfe70c39c578b81e8dca33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/35566a96-31ea-4577-af35-18e15660447f.png?resizew=153)
(1)证明:B,C,E,F四点共面;
(2)求点A到平面BCE的距离.
您最近一年使用:0次
9 . 如图1,正方形
中,
,
,将四边形
沿
折起到四边形
的位置,使得
(如图2).
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871730622701568/2874299759689728/STEM/a84d1eed2477401585ece053e9a1e97b.png?resizew=377)
(1)证明:平面
平面
;
(2)若
分别为
的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c313fea2b6a674896d41950e939fe07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3988ef02a1132c7dbcd682559c2a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515f2668c6ab5e6d0679218ea9c8e4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac79e422ba4876949f0514c44539b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9a5b1190029c438c3a7927fa8f217.png)
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871730622701568/2874299759689728/STEM/a84d1eed2477401585ece053e9a1e97b.png?resizew=377)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643701e7855ef0458513290a99b78f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/712d9d9e29645c1df6ae23125b4aa1cc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e4d7503a7d57ba242ad4e05c7006a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67028ba8e1713be0bb98e5d760d8b8e5.png)
您最近一年使用:0次
2021-12-17更新
|
1066次组卷
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7卷引用:贵州省毕节市2022届高三上学期诊断性考试(一)数学(文)试题
贵州省毕节市2022届高三上学期诊断性考试(一)数学(文)试题甘肃省张掖市2021-2022学年高三上学期期末数学(文)试题陕西省渭南市2022届高三教学质量检测(一)文科数学试题(已下线)专题23 立体几何(文科)解答题20题-备战2022年高考数学冲刺横向强化精练精讲河南省顶尖名校2021-2022学年高三下学期第三次素养调研文科数学试卷(已下线)押全国卷(文科)第19题 立体几何-备战2022年高考数学(文)临考题号押题(全国卷)陕西省渭南市临渭区渭南市三贤中学2024届高三上学期12月月考数学(文)试题
名校
解题方法
10 . 如图,在四棱锥
中,底面
为正方形,△
是正三角形,侧面
底面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/9/17/2810166088802304/2814176132669440/STEM/f28abbf6d8f3464891934136799ab8d5.png?resizew=193)
(1)求证:
平面
;
(2)求三棱锥
与四棱锥
的体积比.
![](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/852aabd89edffc1b94344ff3f1f31ccd.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2021/9/17/2810166088802304/2814176132669440/STEM/f28abbf6d8f3464891934136799ab8d5.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ad6bb2d7efee5583ac605f1f7bce76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2021-09-23更新
|
1922次组卷
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6卷引用:贵州省贵阳市普通中学2023届高三上学期期末监测考试数学(文)试题