1 . 如图,在底面是正方形的四棱锥中
,
,
点
在底面
的射影
恰是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/41744164-3a95-474c-8d48-384b26e198a8.png?resizew=160)
(1)证明:平面
平面
;
(2)求二面角
的正弦值大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364d6c88726d8c3bb8ed297057332bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/41744164-3a95-474c-8d48-384b26e198a8.png?resizew=160)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
2019-01-08更新
|
1413次组卷
|
3卷引用:【校级联考】贵州省贵阳第一中学、云南师大附中、广西南宁三中2019届高三“3 3 3”高考备考诊断联考数学(理)试题
2 . 如图,四棱锥
中,底面 ABCD为矩形,侧面为正三角形,且平面
平面
E 为 PD 中点,AD=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/2723d66a-2dfa-45a1-bf48-e2122f297d55.png?resizew=193)
(1)证明平面AEC丄平面PCD;
(2)若二面角
的平面角
满足
,求四棱锥
的体积.
![](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/efe11ff2c080a2346c3a0f156ebaabd2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/2723d66a-2dfa-45a1-bf48-e2122f297d55.png?resizew=193)
(1)证明平面AEC丄平面PCD;
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75eb1402f4270b68723f61f9e6375d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4009bdd7f95dbfc97141b7c8b836dfa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2019-08-02更新
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887次组卷
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8卷引用:湖南师范大学附属中学2018届高三上学期月考试卷(三)(11月)数学理试题
湖南师范大学附属中学2018届高三上学期月考试卷(三)(11月)数学理试题河北省武邑中学2018届高三上学期第五次调研考试数学(理)试题辽宁省实验中学、大连八中、大连二十四中、鞍山一中、东北育才学校2017-2018学年高二上学期期末考试数学(理)试题福建省闽侯第六中学2017-2018学年高二上学期期末考试数学(理)试题湖南省五市十校2018-2019学年高二下学期期末联考数学(理)试题1湖南省五市十校2018-2019学年高二下学期期末联考数学(理)试题2辽宁省实验中学东戴河分校2019-2020学年高二上学期12月月考数学试卷湖北省沙市中学、郧阳中学、恩施高中、随州二中2019-2020学年高二上学期第三次月考数学试题
名校
3 . 在四棱锥
中,底面
是一直角梯形,
底面
,
,
,
,
,
是
上的点,且
.
![](https://img.xkw.com/dksih/QBM/2019/1/15/2119127592779776/2119223700103168/STEM/9762c39ec4be42d3a56da0ee39ec27b3.png?resizew=190)
(1)若
,求异面直线
与
所成角的大小;
(2)当
为何值时,二面角
的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2032d08bfae318bf1669d27aa8e6366f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef699f5dc072b853cfe700c6f1abbbae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a4d7bce3f94d2166cd332a63b58463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e23051c9ea0127d26aad912fb6ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3a05b557490fb450d7af1250c3bc1b.png)
![](https://img.xkw.com/dksih/QBM/2019/1/15/2119127592779776/2119223700103168/STEM/9762c39ec4be42d3a56da0ee39ec27b3.png?resizew=190)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8da022b26812ea653c7ed00cb1fb448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b866173e0a81cefa03b248602502e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8067cbba862cec3ae86b5e14878c5bc2.png)
您最近一年使用:0次
15-16高三上·上海浦东新·期中
名校
4 . 如图,在四棱柱
中,侧棱
底面
,
,
,
,
,
,
,(
)
平面
;
(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/86c0ad79161fb29ec231dd0248623ed3.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/2f0d68648b10fce54dfc19c5ee60086d.png)
![](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/2777840758e70e7dbbc18cef8f3d6d2b.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/fa7a84d7e5d6236009a8be655bd500fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7a84d7e5d6236009a8be655bd500fd.png)
您最近一年使用:0次
2020-02-05更新
|
849次组卷
|
5卷引用:上海市华东师大二附中2016届高三上学期期中数学试题
(已下线)上海市华东师大二附中2016届高三上学期期中数学试题辽宁省实验中学2024届高三考前模拟数学试卷(已下线)上海市华东师范大学第二附属中学2020-2021学年高二下学期期中数学试题北京市一零一中学2021-2022学年高二上学期期末考试数学试题(已下线)第一章 空间向量与立体几何(压轴必刷30题4种题型专项训练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
5 . 在直角三角形
中,
,
为
的中点,以
为折痕将
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/2018/10/29/2063962890559488/2064185756368896/STEM/efec2dfc53fa42138bb66dd9ea2da114.png?resizew=225)
(1)求证:
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60334b062acf697efaa4f3f7087a80dc.png)
![](https://img.xkw.com/dksih/QBM/2018/10/29/2063962890559488/2064185756368896/STEM/efec2dfc53fa42138bb66dd9ea2da114.png?resizew=225)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
13-14高二上·福建·期末
名校
解题方法
6 . 在正方体ABCD-A1B1C1D1中,E是C1D1的中点,则异面直线DE与AC所成角的余弦值为( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-08-13更新
|
1800次组卷
|
15卷引用:专题06+立体几何-2021高考数学(理)高频考点、热点题型归类强化
(已下线)专题06+立体几何-2021高考数学(理)高频考点、热点题型归类强化(已下线)2012-2013学年福建省师大附中高二上学期期末考试理科数学试卷河南省商丘市九校2017-2018学年高二上学期期末联考数学(理)试题(已下线)第二章 空间向量与立体几何(基础过关)-2020-2021学年高二数学单元测试定心卷(北师大版选修2-1)重庆市缙云教育联盟2020-2021学年高一下学期期末数学试题广东省普宁市2019-2020学年高二上学期期中数学试题(已下线)第一章 (综合培优)空间向量与立体几何 B卷-【双基双测】2021-2022学年高二数学同步单元AB卷(人教A版2019选择性必修第一册)(已下线)1.4 空间向量的应用-2021-2022学年高二数学同步教与学全指导(学习导航+教学过程+课时训练)(人教A版2019选择性必修第一册)重庆市2021-2022学年高一下学期学业质量调研数学试题湖南省长沙市南雅中学2020-2021学年高二下学期入学适应性练习数学试题北京交通大学附属中学2022-2023学年高二上学期期中考试数学试题北京市昌平区首都师范大学附属回龙观育新学校2023-2024学年高二上学期10月月考数学试题四川省南充市阆中东风中学校2023-2024学年高二上学期第二次段考数学试题四川省南充市南部中学2023-2024学年高二上学期第二次月考数学试卷四川省宜宾市棠湖高级中学2023-2024学年高二上学期阶段测试三(12月月考)数学试题
名校
7 . 如图,在四棱锥
中,底面
为平行四边形,已知
,
,
与
.
![](https://img.xkw.com/dksih/QBM/2019/1/14/2118643230154752/2119444159758336/STEM/1892d103c699407794858203a9053bbd.png?resizew=242)
(1)求证:
;
(2)若平面
平面
,且
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a4b8b69b419c557ba61a2bdfaf4066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95ed5fcb52987b6686149050bc72b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c127c651cf30e68b6c3abedc1f0d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497846628a41a9bc750a645e045afb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2019/1/14/2118643230154752/2119444159758336/STEM/1892d103c699407794858203a9053bbd.png?resizew=242)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf6c62979a7aa534a191d8387a741e8.png)
(2)若平面
![](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/5e61dcea246d9be228d26796f59443bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d61d38dbcd75e04f08d65235fc10046.png)
您最近一年使用:0次
2019-01-15更新
|
2498次组卷
|
4卷引用:福建省惠安惠南中学2019届高三上学期第二次月考数学(理)试题
名校
8 . 如图,在四棱锥P﹣ABCD中,底面ABCD为直角梯形,BC∥AD,AB⊥BC,∠ADC=45°,PA⊥平面ABCD,AB=AP=1,AD=3.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/b21705d7-5db6-4cfc-8167-b77abbe95df9.png?resizew=163)
(1)求异面直线PB与CD所成角的大小;
(2)求点D到平面PBC的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/b21705d7-5db6-4cfc-8167-b77abbe95df9.png?resizew=163)
(1)求异面直线PB与CD所成角的大小;
(2)求点D到平面PBC的距离.
您最近一年使用:0次
2018-12-20更新
|
1569次组卷
|
17卷引用:上海市崇明区2018届高三4月模拟考试(二模)数学试题
上海市崇明区2018届高三4月模拟考试(二模)数学试题【全国百强校】上海市建平中学2019届高三上学期期中考试数学试题人教B版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 本章达标检测上海市实验学校2020-2021学年高二下学期期末数学试题山东省临沂市兰山区、罗庄区2021-2022学年高二上学期中考试数学试题山东省聊城市2021-2022学年高二上学期期中数学试题山东省临沂市兰陵县2021-2022学年高二上学期期中数学试题山东省临沂市多县区2021-2022学年高二上学期期中教学质量检测数学试题辽宁省丹东市东港市第二中学2022-2023学年高二上学期第一阶段考试数学试题山东省济宁市梁山县第一中学2022-2023学年高二上学期10月月考数学试题山东省临沂市临沂第二中学2022-2023学年高二上学期期中数学试题贵州省安顺市黄果树高级中学2022-2023学年高二上学期第一次月考数学试题四川省盐亭中学2022-2023学年高二下学期第一学月教学质量监测理科数学试题山东省威海市乳山市银滩高级中学2023-2024学年高二上学期9月月考数学试题福建省南平市浦城县荣华实验高中2023-2024学年高二上学期第一次月考数学试题陕西省西安市鄠邑区第二中学2023-2024学年高二上学期第一次月考数学试题(已下线)期末真题必刷压轴60题(22个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)
9 . 如图,三棱柱
中,侧面
是菱形,
.
![](https://img.xkw.com/dksih/QBM/2018/12/15/2097562842603520/2099429382881280/STEM/8c235fd214a44a30a342d78c403f8ea2.png?resizew=257)
(1)证明:
;
(2)若
,
,
,求直线
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/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7870cee007535b979d35bc7feab75616.png)
![](https://img.xkw.com/dksih/QBM/2018/12/15/2097562842603520/2099429382881280/STEM/8c235fd214a44a30a342d78c403f8ea2.png?resizew=257)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ee347187fbbfe9e8a6faf286795d79.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16d5f3939886998e160a75cfafdeef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0720b376738d92994c84042ee0fc0bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
您最近一年使用:0次
2013·湖南怀化·一模
名校
解题方法
10 . 如图1,
,过动点
作
,垂足
在线段
上且异于点
,连接
,沿
将
折起,使
(如图2所示),
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8677db1f-f0c3-418a-b98a-838b801c7750.png?resizew=334)
(1)当
的长为多少时,三棱锥
的体积最大;
(2)当三棱锥
的体积最大时,设点
分别为棱
的中点,试在棱
上确定一点
,使得
,并求
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa41b8cc912b518b764d1919ce14751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587458141d890533c0c32aa249a27ad0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8677db1f-f0c3-418a-b98a-838b801c7750.png?resizew=334)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48dc419adb17eb12220f07480b077b8.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48dc419adb17eb12220f07480b077b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5889e1f093f2c35273d3132ef8434e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cca04b2a2b61d62a809776670a60c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5448218bd8c5b4f4a3714e0b0292d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
您最近一年使用:0次
2020-03-16更新
|
422次组卷
|
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