名校
解题方法
1 . 已知函数
.
(1)当
时,直接写出
的单调区间(不要求证明),并求出
的值域;
(2)设函数
,若对任意
,总有
,使得
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b2d3738f56987d159a343dc160f384.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdabdbbbde9b3ee68df66171b0145785.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d5a5e70f64f0933ae1e4ddec5fa2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61761abb364ece2281af24d9b1f008de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2024-03-07更新
|
513次组卷
|
11卷引用:安徽省合肥市一中、六中、八中三校2020-2021学年高一上学期期末数学试题
安徽省合肥市一中、六中、八中三校2020-2021学年高一上学期期末数学试题安徽省合肥一中、六中、八中2020-2021学年高一上学期期末联考数学试题安徽省淮南市寿县第一中学2020-2021学年高一下学期入学考试数学试题安徽省淮北市树人高级中学2020-2021学年高一下学期开学考试数学试题(已下线)大题好拿分期中考前必做30题(压轴版)-2020-2021学年高一数学下册期中期末考试高分直通车(沪教版2020必修第二册)(已下线)第7章 三角函数 单元测试(单元综合检测)(难点)(单元培优)-2021-2022学年高一数学课后培优练(苏教版2019必修第一册)(已下线)7.3 三角函数的图像和性质(难点)(课堂培优)-2021-2022学年高一数学课后培优练(苏教版2019必修第一册)山东省淄博市美达菲双语高级中学2022-2023学年高一下学期3月月考数学试题湖南省株洲市第二中学2022届高三下学期期中数学试题(已下线)专题17 三角值域问题四川省德阳市德阳中学校2023-2024学年高一下学期入学考试数学试卷
名校
解题方法
2 . 铰链又称合页,是用来连接两个固体并允许两者之间做相对转动的机械装置.铰链由可移动的组件构成,或者由可折叠的材料构成,合页主要安装与门窗上,而铰链更多安装与橱柜上,如图所示,
就是一个合页的抽象图,
可以在
上变化,其中
,正常把合页安装在家具门上时,
的变化范围是
,根据合页的安装和使用经验可知,要使得安装的家具门开关并不受影响,在以
为边长的正三角形
区域内不能有障碍物.
(1)若
使,求
的长;
(2)当
为多少时,
面积取得最大值?最大值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8044faecc4d5a611814a7f1e64dbf8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8107678c7709e1ef6aea705dbd0e85c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f8879c9994fe5c7681d7a754be0279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/16/61caf8e3-bd02-4656-930f-42e960e2a42f.png?resizew=128)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42789f54f6d3e1d508837711c6a873b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc52a06d806fde891e09a0a389fcd4.png)
您最近一年使用:0次
2023-08-14更新
|
842次组卷
|
9卷引用:河南省新郑市2021-2022学年高二上学期第一次阶段性检测数学(文)试题
河南省新郑市2021-2022学年高二上学期第一次阶段性检测数学(文)试题(已下线)数学与建筑(已下线)第13课时 课后 余弦定理、正弦定理应用举例(已下线)增分专题二 解三角形范围与最值问题(已下线)第6章 平面向量及其应用(新文化30题专练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)江苏省镇江市扬中市第二高级中学2023-2024学年高二上学期期初检测数学试题江苏省扬州中学2023-2024学年高三上学期10月月考数学试题(已下线)压轴题平面向量与解三角形新定义题(九省联考第19题模式)讲 (已下线)第六章 三角(压轴题专练)-单元速记·巧练(沪教版2020必修第二册)
3 . 已知数列
的通项公式为
,将这个数列中的项摆放成如图所示的数阵,记
为数阵从左至右的n列,从上到下的n行共
个数的和,则数列
的前2020项和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760526364f3b888cbdc9193285e3c80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceef1abeeef220b4fe5f7d96feedd90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff590e4ca93b20a9de37f7a2de7d09b7.png)
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() … … … … … ![]() ![]() ![]() ![]() |
您最近一年使用:0次
4 . 在①数列
的通项公式
,数列
中的最大项和最小项的值分别是等比数列
中的
和
的值,②点
在直线
上,其中
是数列
的前
项和,这两个条件中任选一个,补充在下面横线上并解答问题.
已知______,数列
满足
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1b36cf8fa8fe9069656ee90a9db8f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c493b9bf693aa7b9b964c488729256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52253634463ad5e70491206dd05ea8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d144c46d67492be75fc9402747b5a498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
已知______,数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec8b3d86fce0d1d70bf2e451b4a8c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
您最近一年使用:0次
解题方法
5 . 已知函数
,数列
的前
项和为
,且对一切正整数
,点
都在函数
的图象上.
(1)求数列
的通项公式.
(2)设
,
,等差数列
中的任一项
,其
是
中的最小数,且
,求
的通项公式.
(3)设数列
满足
,是否存在正整数
,
,使得
,
,
成等比数列?若存在,求出所有的
,
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d0a88dee7f0e44664bda697c7938ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/528042c027763b53c080104675c204bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/155e6ddefcf741e1ffb9de52b211dcfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7841115f40ce79a6a57a06d395b5ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa5bc2bdfd0bd4ff3a44cad1201b3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b715e7842b95f654f16056a7c7f2abe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba24590ac45c6cfeeabb20adaedb0dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423a3264512e599d967707a331039100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013025dc000cedee84dacdd53ab950d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35fc9116814de078677b34ea3979b97f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819d8b4711cacd6265f5697d4cc188c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
2021-09-20更新
|
438次组卷
|
2卷引用:人教A版(2019) 选修第二册 突围者 第四章 易错疑难集训(三)
6 . 设数列
,
的前
项和分别为
,
,
,
,且
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c752ebe8516e7d3327f3410473d9a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2557fbcbf6827167e50a37bbe7cc31a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7f8006ec87ad42ab230869dfcbf3df.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-20更新
|
2454次组卷
|
7卷引用:人教A版(2019) 选修第二册 突围者 第四章 专项拓展训练2 数列的前n项和的求解
人教A版(2019) 选修第二册 突围者 第四章 专项拓展训练2 数列的前n项和的求解(已下线)第4章 数列 单元综合检测(难点)(单元培优)-2021-2022学年高二数学课后培优练(苏教版2019选择性必修第一册)(已下线)第21讲 数列求和-2022年新高考数学二轮专题突破精练重庆市万州第二高级中学2021-2022学年高二下学期入学考试数学试题(已下线)4.1数列(第2课时)(分层作业)(2)(已下线)专题04 数列的概念与等差数列(1)(已下线)专题04 数列(5)
名校
7 . 设
,则
的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d0fad3897651e493323dbcca2102f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eea9a0ba2b2454020fcb66c58478a48.png)
您最近一年使用:0次
2021-09-10更新
|
1142次组卷
|
3卷引用:重庆市西南大学附属中学校2020-2021学年高二下学期第四次月考数学试题
重庆市西南大学附属中学校2020-2021学年高二下学期第四次月考数学试题(已下线)专题07 基本不等式压轴题型汇总-2021-2022学年高一《新题速递·数学》(人教A版2019)2.1.2基本不等式
8 . 数列
依次为:1,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,…,其中第一项为
,接下来三项均为
,再接下来五项均为
,依此类推.记
的前
项和为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b045c6172c4178d7aa52083e1489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b045c6172c4178d7aa52083e1489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5296c0056db0e2b5331c9b9a6d45962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.![]() | B.存在正整数![]() ![]() |
C.![]() | D.数列![]() |
您最近一年使用:0次
2021-09-08更新
|
1621次组卷
|
7卷引用:湖北省武汉市部分学校2021-2022学年高三上学期9月起点质量检测数学试题
名校
解题方法
9 . 在各项均为正数的数列
中,
为前
项和,
且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec6439c99c6a996a48b7d9e57c21208.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16c60afc204504c4973c825cc1f0fa81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f78fe78fe04158473908557be9567b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dec6439c99c6a996a48b7d9e57c21208.png)
您最近一年使用:0次
2021-09-02更新
|
1099次组卷
|
3卷引用:河北省衡水市武强中学2020-2021学年高一下学期期中数学(理)试题
解题方法
10 . 如图,某人身高
,他站的地点
和云南大理文笔塔塔底
在同水平线上,他直立时,测得塔顶
的仰角
(点
在线段
上,忽略眼睛到头顶之间的距离,下同).他沿线段
向塔前进
到达点
,在点
直立时,测得塔顶
的仰角
:塔尖MN的视角
(
是塔尖底,在线段
上).
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754872852873216/2781076809252864/STEM/98bd4bdc-fae1-4c25-b0a0-b847bfac9913.png?resizew=331)
(1)求塔高
;
(2)此人在线段
上离点
多远时,他直立看塔尖
的视角最大?说明理由.
参考数据:
,
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad35c8e3dc9a0a2d7e17f235593a725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a2dfdcdab05b60a1ee81a74061e86d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d98a867c15065700a04ccf6a3b9e6529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd8515118a6137f3323fa74730747559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79673bc5b6037d6516df1be25e0d2d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
![](https://img.xkw.com/dksih/QBM/2021/7/1/2754872852873216/2781076809252864/STEM/98bd4bdc-fae1-4c25-b0a0-b847bfac9913.png?resizew=331)
(1)求塔高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfef623a9534b5708df5f95f1760a5.png)
(2)此人在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21c6c8df2c8aaf99721ada68fe59cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892c71122fab5d95df9db7a94ca62d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39631c8b0f107dce57c8edc2ab0d8fd3.png)
您最近一年使用:0次
2021-08-07更新
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1778次组卷
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7卷引用:四川省达州市2020-2021学年高一下学期期末数学(理)试题
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