名校
1 . 素数又称质数,是指在大于
的自然数中,除了
和它本身以外不再有其他因数的自然数.早在
多年前,欧几里德就在《几何原本》中证明了素数是无限的.在这之后,数学家们不断地探索素数的规律与性质,并取得了显著成果.中国数学家陈景润证明了“
”,即“表达偶数为一个素数及一个不超过两个素数的乘积之和”,成为了哥德巴赫猜想研究上的里程碑,在国际数学界引起了轰动.如何筛选出素数、判断一个数是否为素数,是古老的、基本的,但至今仍受到人们重视的问题.最早的素数筛选法由古希腊的数学家提出.
年,一名印度数学家发明了一种素数筛选法,他构造了一个数表
,具体构造的方法如下:
中位于第
行第
列的数记为
,首项为
且公差为
的等差数列的第
项恰好为
,其中
;
.请同学们阅读以上材料,回答下列问题.
(1)求
;
(2)证明:
;
(3)证明:
①若
在
中,则
不是素数;
②若
不在
中,则
是素数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4abb59695562b3a1295a251dc97da700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00860a6a9f7275e3d61e519b63802dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc975755665e2675c150f52821609f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
,具体构造的方法如下:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a14c188b1c9d61aa237b137ba18023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c9ee6c50000eef418c6103ecf721dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637ba0eba55f2fe7a0d03555056abdd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a14c188b1c9d61aa237b137ba18023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c5fabeba3f3212955d9e282cd5482b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bbc1c45063bba6f24c99a3e30b9fd5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164ae1d08f223df4fa8df94bad8edd57.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de075cbe45f637a11f53685a018e340a.png)
(3)证明:
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbac458da41f3d58829f20be4781d50d.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbac458da41f3d58829f20be4781d50d.png)
您最近一年使用:0次
2022-04-01更新
|
1679次组卷
|
4卷引用:北京市门头沟区2022届高三一模数学试题
北京市门头沟区2022届高三一模数学试题北京市第一六一中学2022届高三考前热身训练数学试题(已下线)专题4 “素材创新”类型(已下线)第六篇 数论 专题1 数论中的特殊数 微点2 数论中的特殊数综合训练
2 . 在各项均不为零的数列
中,选取第
项、第
项、…、第
项,其中
,
,若新数列
为等比数列,则称新数列为
的一个长度为
的“等比子列”.已知等差数列
,其各项与公差
均不为零.
(1)若在数列
中,公差
,
,且存在项数为3的“等比子列”,求数列
的通项公式;
(2)若
,数列
为
的一个长度为
的“等比子列”,其中
,公比为
.当
最小时,求
的通项公式;
(3)若公比为
的等比数列
,满足
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac52d20d7bb3a6631f5035ef18b64c19.png)
,证明:数列
为数列
的“等比子列”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27628b047da341c79074ea4aa938ddc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527093b2ec760913d0dccff8a099248b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c5b45ef6860f96dd3f033b456056c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ba164203399725ee3c6d42ba903b56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(1)若在数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c1344592c925b273f2cb9b9e47ebbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e234c3ca9dee1ae2a17638010eaf7f90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbd9fd3c51552c29d7c351790bb2404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffcbf641680b1c03802d53984840ab66.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/2eaa992a449b828df0ff545e233b279b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbbf4d763f3cbe5a71707bc19c78191.png)
(3)若公比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fe0f4e8a80a2840c0f6929a8a6351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769fe52ac96348d3b12d23d06d702595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac52d20d7bb3a6631f5035ef18b64c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8eeab42f189f7464a50e44bd29406e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
3 . 已知数列
满足:
,
,
,数列
满足
,
,数列
的前
项和为
.
(1)求数列
的通项
.
(2)求证:数列
为等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2438f2272d7b7ab51dbbe587025a553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ced564150c49c1afbe3e23cbd540ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0a9a0c97fd3a3699d2e389caf0db486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f83efca68bc470e464a97a7cd6222e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff708fbea7c09e6ef5346655e7e11c6.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)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79768a4e3970a18741cee3fbd8bcbdad.png)
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2021·全国·模拟预测
4 . 在等差数列
中,
,其前n项和为
,各项均为正数的等比数列
中,
,且满足
,
.
(1)求数列
与
的通项公式;
(2)若数列
的前n项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/968eb1910572edb648591d1dd90b53f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6661d6e240d8733d43b76172320854.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8050391385b496e9c059201e4f12600a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3860c78a8d25ac6b5c1cff5ebbd960fc.png)
您最近一年使用:0次
2021-09-07更新
|
1324次组卷
|
5卷引用:北京市一零一中学怀柔分校2022届高三高考数学模拟试题
北京市一零一中学怀柔分校2022届高三高考数学模拟试题(已下线)“超级全能生”2021届高三3月份高考数学(理)联考试题(丙卷)(已下线)考向27 等差数列及其前n项和(重点)-备战2022年高考数学一轮复习考点微专题(新高考地区专用)黑龙江省哈尔滨市第六中学2021-2022学年高三上学期期中考试数学(理)试题宁夏石嘴山市第三中学2022届高三上学期期末考试数学(理)试题
名校
5 . 已知有限数列
为单调递增数列.若存在等差数列
,对于A中任意一项
,都有
,则称数列A是长为m的
数列.
(1)判断下列数列是否为
数列(直接写出结果):
①数列1,4,5,8;②数列2,4,8,16.
(2)若
,证明:数列a,b,c为
数列;
(3)设M是集合
的子集,且至少有28个元素,证明:M中的元素可以构成一个长为4的
数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78af5020619465dd4f48090d1c27825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588d22323fe2e6666bb7052a5d686b60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3acb298edf3a1af4b0c18396e7c453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
(1)判断下列数列是否为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
①数列1,4,5,8;②数列2,4,8,16.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf36a8b0b9303e515cab436d325cd90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
(3)设M是集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b598d2cc3e2ea8e6a76670b1feecbad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb9ad1e34877b0db02d0219332b0f7b.png)
您最近一年使用:0次
2021-04-22更新
|
1039次组卷
|
6卷引用:北京市通州区2021届高三年级一模数学试题
北京市通州区2021届高三年级一模数学试题北京首师附中2021~2022学年高二上学期1月月考数学试题北京市师大附中2022-2023学年高二上学期数学期末试题北京卷专题18数列(解答题)北京市第九中学2024届高三上学期12月月考数学试题(已下线)4.2.2 等差数列的通项公式(1)-2021-2022学年高二数学同步培优训练系列(苏教版2019选择性必修第一册)
解题方法
6 . 定义首项为1,且公比为正数的等比数列为"M—数列”
(Ⅰ)已知数列
是单调递增的等差数列,满足
,求数列
的通项公式;
(Ⅱ)已知数列
的前n项和为
,若
是
和1的等差中项,证明:数列
是"M-数列";
(Ⅲ)在(Ⅰ)的条件下,若存在"M—数列”
,对于任意正整数k,都有
成立.求此时数列
公比q的最小值.
(Ⅰ)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b507923114ca32ef53982240bdd33852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(Ⅱ)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(Ⅲ)在(Ⅰ)的条件下,若存在"M—数列”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c9062bc228495507c8576177fd2789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
您最近一年使用:0次
7 . 已知等差数列
中,
,
,数列
满足
.
(1)求数列
的通项公式;
(2)证明
是等比数列,并求
前n项的和
;
(3)记数列
前n项的乘积为
,若
成立,直接写出m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e05ea61581ab3ce0f51ec93f422143bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9b6e51986fe5d7a7265e0e93adcb4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752cf42c1043745a337b6c0394709c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/162f5d9ea332401493a04b0d92a63098.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e00b064587b7f4a1181c8bb6e77dcbf.png)
您最近一年使用:0次
名校
解题方法
8 . 如果数列
满足“对任意正整数i,j,
,都存在正整数k,使得
”,则称数列
具有“性质P”.已知数列是无穷项的等差数列,公差为d.
(1)若
,
,判断数列
是否具有“性质P”,并说明理由;
(2)若数列
具有“性质P”,求证:
且
;
(3)若数列
具有“性质P”,且存在正整数k,使得
,这样的数列共有多少个?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b71af6590f0f369c164a054a8b63bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab406d94b4907ab8a20ae3214628b045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fc336b4a83bf6d66c4afcc431597f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3b18d23d41e5f456dfd6485feed523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3068733ef2ceda9f1620d5c9bcdfa542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f8e68eb4ade6e22982d2df5102d8894.png)
(3)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0af74258551ca3f28b2c6ce54bffd1.png)
您最近一年使用:0次
解题方法
9 . 已知数列
是等差数列,
,
,数列
的前
项和是
,且
.
(1)求数列
的通项公式;
(2)求证数列
是等比数列;
(3)记
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7def23f30138e0b7c4c1e498d6903a6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f8d9491c128591de76464d56a3ac1e.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/bf3ff620844128192f9d76adc52864c4.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求证数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac07953530e3c248b3438fb200fb1661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6181efc8da38375fb0fe04dc8f54d757.png)
您最近一年使用:0次
2012·广东广州·一模
名校
解题方法
10 . 已知等差数列{an}的公差d≠0,它的前n项和为Sn,若S5=70,且a2,a7,a22成等比数列.
(1)求数列{an}的通项公式;
(2)设数列{
}的前n项和为Tn,求证:
(1)求数列{an}的通项公式;
(2)设数列{
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfce215f34f701ee7c2cd2889a50f3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d20b356f7efd82d5a1cee6a27b5ae92.png)
您最近一年使用:0次
2020-07-26更新
|
290次组卷
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21卷引用:2019届北京市中国人民人大附属中学高三(5月)模拟数学(文)试题
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