1 . 图①、图②、图③都是
的正方形网格,每个小正方形的顶点称为格点.
均为格点.在给定的网格中,按下列要求画图:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/32e1f161-731b-4bcc-8100-b0db9ea25764.png?resizew=346)
(1)在图①中,画一条不与
重合的线段
,使
与
关于某条直线对称,且
为格点.
(2)在图②中,画一条不与
重合的线段
,使
与
关于某条直线对称,且
为格点.
(3)在图③中,画一个
,使
与
关于某条直线对称,且
为格点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777d8fccf0cf8b55a68488fe48b78744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/32e1f161-731b-4bcc-8100-b0db9ea25764.png?resizew=346)
(1)在图①中,画一条不与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
(2)在图②中,画一条不与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
(3)在图③中,画一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
您最近一年使用:0次
2 . 如图,甲、乙两人(看成点)分别在数轴
和5的位置上,沿数轴做移动游戏.每次移动游戏规则:
裁判先捂住一枚硬币,再让两人猜向上一面是正是反,而后根据所猜结果进行移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/a3aa0688-0ca3-4788-bdea-948bf41104cd.png?resizew=233)
①若都对或都错,则甲向东移动1个单位,同时乙向西移动1个单位;
②若甲对乙错,则甲向东移动4个单位,同时乙向东移动2个单位;
③若甲错乙对,则甲向西移动2个单位,同时乙向西移动4个单位.
(1)经过第一次移动游戏,求甲的位置停留在正半轴上的概率
;
(2)从如图的位置开始,若完成了10次移动游戏,发现甲、乙每次所猜结果均为一对一错.设乙猜对
次,且他最终停留的位置对应的数为
,试用含
的代数式表示
,并求该位置距离原点
最近时
的值;
(3)从如图的位置开始,若进行了
次移动游戏后,甲与乙的位置相距2个单位,直接写出
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
裁判先捂住一枚硬币,再让两人猜向上一面是正是反,而后根据所猜结果进行移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/a3aa0688-0ca3-4788-bdea-948bf41104cd.png?resizew=233)
①若都对或都错,则甲向东移动1个单位,同时乙向西移动1个单位;
②若甲对乙错,则甲向东移动4个单位,同时乙向东移动2个单位;
③若甲错乙对,则甲向西移动2个单位,同时乙向西移动4个单位.
(1)经过第一次移动游戏,求甲的位置停留在正半轴上的概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)从如图的位置开始,若完成了10次移动游戏,发现甲、乙每次所猜结果均为一对一错.设乙猜对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)从如图的位置开始,若进行了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
3 . 如图所示,将一个半径
,圆心角
的扇形纸板放置在水平面的一条射线
上,在没有滑动的情况下,将扇形
沿射线
翻滚至
再次回到
上时,
运动的路线长为__________
.(计算结果不取近似值)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae1859ae3035da683f926f3d7ddf9bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f05d0ebdc824907a12cd725d1b3011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/53ebc70a-cabb-4af9-b88e-b942e11e6f3b.png?resizew=363)
您最近一年使用:0次
4 . 匈牙利著名数学家爱尔特希(P.Erdos,1913-1996)曾提出:在平面内有
个点,其中每三个点都能构成等腰三角形,人们将具有这样性质的
个点构成的点集称为爱尔特希点集.如图,是由五个点
构成的爱尔特希点集(它们为正五边形的任意四个顶点及正五边形的中心构成),则
的度数是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d1ff865f265f5f66345d554a37603a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/565d0de7845e77737b774e8db6d43ee1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/6dfae4e0-b730-48c7-9cd6-d7c2ec77019e.png?resizew=167)
您最近一年使用:0次
5 . 如图,在
中,
,分别以点
为圆心,以大于
的长为半径画弧,两弧分别交于点
,作直线
交
点
;以点
为圆心,适当长为半径画弧,分别交
于点
,再分别以点
为圆心,大于
的长为半径画弧,两弧交于点
,作射线
,此时射线
恰好经过点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
__________ 度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f1910ea311f93b4f157b5464273a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d49404351575703cfe8325d1352ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e203b7c9a6600e0272c58a23733490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffea75cc9ccdb9371d82864d1dd086f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae536809b1161fd4e83fdc7f42be96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae536809b1161fd4e83fdc7f42be96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d092504d3c33c48be43f23b788efd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/93b4a46f-8dbd-4ad8-86a7-f26f7f0d4d85.png?resizew=202)
您最近一年使用:0次
6 . 如图,将
绕边
的中点
顺时针旋转
.嘉淇发现,旋转后的
与
构成平行四边形,并推理如下:
小明为保证嘉淇的推理更严谨,想在方框中“
”和“
四边形...”之间作补充,下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/7300176e-3739-4f16-bd8a-ab8887559912.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e7a123c9cc0e058db28841fb0edcf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf94bbdc11e2942b20368833c7d7a787.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
点![]() 而点 ![]() ![]() ![]() ![]() ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21510690a3321fec0ff1cf72b1582df1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de0d10ef8b748d4531250c37c5d3f9e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/7300176e-3739-4f16-bd8a-ab8887559912.png?resizew=162)
A.嘉淇推理严谨,不必补充 |
B.应补充:且![]() |
C.应补充:且![]() ![]() |
D.应补充:且![]() |
您最近一年使用:0次
7 . 如图1,已知
,用尺规作它的角平分线.
如图2,步骤如下,
第一步:以
为圆心,以
为半径画弧,分别交射线
于点
;
第二步:分别以
为圆心,以
为半径画弧,两弧在
内部交于点
;
第三步:画射线
.射线
即为所求.
下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/9eec5059-af1a-4e6e-9daa-6115e0cb465b.png?resizew=593)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
如图2,步骤如下,
第一步:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58e08ee0b2580a62cf20f709b5e90df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
第二步:分别以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
第三步:画射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
下列正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/14/9eec5059-af1a-4e6e-9daa-6115e0cb465b.png?resizew=593)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() |
您最近一年使用:0次
8 . 《九章算术》是古代东方数学代表作,书中记载:今有开门去阃(读kǔn,门槛的意思)一尺,不合二寸,问门广几何?题目大意是:如图1、2(图2为图1的平面示意图),推开双门,双门间隙
的距离为2寸,点
和点
距离门槛
都为1尺(1尺
寸),则
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/e5bd6d05-6ebd-4e2d-a615-6299143f2ef7.png?resizew=346)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3c450315612a9fa3fc9562f290bc04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/e5bd6d05-6ebd-4e2d-a615-6299143f2ef7.png?resizew=346)
A.50.5寸 | B.52寸 | C.101寸 | D.104寸 |
您最近一年使用:0次
9 . 2020年初以来,红星消毒液公司生产的消毒液在库存量为
吨的情况下,日销售量与产量持平.自1月底抗击“新冠病毒”以来,消毒液需求量猛增,该厂在生产能力不变的情况下,消毒液一度脱销,下面表示2020年初至脱销期间,该厂库存量
(吨)与时间
(天)之间函数关系的大致图象是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
10 . 设等差数列
的前
项和为
,则有以下四个结论:
①若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca47be5a21ea60ebd04dd8945852d8.png)
②若
,且
,则
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eef1f2c439ad1043f4b0e8892066826.png)
③若
,且在前16项中,偶数项的和与奇数项的和之比为3:1,则公差为2
④若
,且
,则
和
均是
的最大值
其中正确命题的序号为___________ .
![](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)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd67cf18bd35149475d35f1c603ad59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99ca47be5a21ea60ebd04dd8945852d8.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45c65fa15317b33766389407c427668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642a443e3315a7fb6489b01fad7e3215.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3c579e5e0540f190994cbb5b0653a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eef1f2c439ad1043f4b0e8892066826.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8bdb404dcbe74cd8bbd30de782a8fa.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8933c07e3651731291184c080766c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41c4154f019120be078200f2dff6f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
其中正确命题的序号为
您最近一年使用:0次
2023-11-26更新
|
508次组卷
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