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【山西省太原市2024-2025学年高二上学期期末学业诊断数学试卷 Word版含解析

  • 2026-02-14 07:14:57
【山西省太原市2024-2025学年高二上学期期末学业诊断数学试卷 Word版含解析

20242025 学年第一学期高二年级期末学业诊断

数学试卷

(考试时间:上午8001000

说明:本试卷为闭卷笔答,答题时间120 分钟,满分150 分.

一、单项选择题(本题共小题,每小题分,共40 分.在每小题给出的四个选项中,只有

一项是符合题目要求的)

1. 抛物线 y2=4x 的焦点坐标是

A. 0,2 B. 0,1 C. 2,0 D. 1,0

【答案】D

【解析】

【详解】试题分析:的焦点坐标为,故选 D.

【考点】抛物线的性质

【名师点睛】本题考查抛物线的定义.解析几何是中学数学的一个重要分支,圆锥曲线是解析几何的重要

内容,它们的定义、标准方程、简单几何性质是我们要重点掌握的内容,一定要熟记掌握.

2. 双曲线的顶点坐标为(

A. , B. , C. , D. ,

【答案】B

【解析】

【分析】根据双曲线的几何性质即可求解.

【详解】由双曲线方程可知双曲线焦点在轴上,,所以双曲线的顶点坐标为

, .

故选:B.

3. 已知抛物线以圆的圆心为焦点,则其标准方程为(

A B. C. D.

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【答案】D

【解析】

【分析】根据条件得到圆心为,可得,再利用标准方程的形式,即可求解.

【详解】因为的圆心为,所以,得到 ,

又焦点在轴的正半轴上,所以抛物线的标准方程为 ,

故选:D.

4. 已知双曲线的一个焦点为,其离心率,则该双曲线的渐近线方程为(

A. B. C. D.

【答案】A

【解析】

【分析】由条件求得,再根据焦点位置确定渐近线方程.

【详解】由题意 , , ,所以 ,

焦点在轴,则渐近线方程为 ,

故选:A

5. 已知双曲线以椭圆方程E的焦点为顶点,以的顶点为焦点,则双曲线的标准方程为

A. B. C. D.

【答案】C

【解析】

【分析】求出椭圆的顶点和焦点,即可得出双曲线方程.

【详解】∵椭圆方程E的焦点坐标为 , ,上、下顶点为 ,

.

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∴设双曲线方程C,则 ,

,∴设双曲线方程C

故选:C.

6. 已知点是抛物线上一点,则点到直线的距离的最小值为(

A. B. 2 C. D.

【答案】A

【解析】

【分析】根据点在抛物线上,设,结合点到直线的距离公式与二次函数的性质即可求

.

【详解】∵点在抛物线上,∴设 ,

∴点到直线的距离 ,

当且仅当,即时取等号.

到直线距离的最小值为 .

故选:A.

7. 已知直线与双曲线相交于两个不同点,点

的中点,则双曲线的离心率为(

A. B. C. D.

【答案】D

【解析】

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【分析】利用点差法可求得,结合可得出双曲线的离心率的值.

【详解】设点,由题意可得 ,

因为点的中点,则 ,

因为,这两个等式作差可得 ,

所以, ,

因此,双曲线的离心率为 .

故选:D.

8. 古希腊数学家帕普斯在他的著作《数学汇编》中对圆锥曲线给出了统一定义,即到定点的距离与到定直

线的距离的比是常数的点的轨迹叫做圆锥曲线.当时,轨迹为椭圆;当时,轨迹为抛物线;

时,轨迹为双曲线.若方程表示的曲线是双曲线,则实数的取值范

围为(

A. B. C. D.

【答案】B

【解析】

【分析】把方程化为点到定点的距离与到定直线距离之比的形式后,由定义可得.

【详解】由,即 ,

该方程表示双曲线,则,解得 ,

故选:B

二、多项选择题(本题共小题,每小题分,共18 分.在每小题给出的四个选项中,有多

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项符合题目要求.全部选对的得分,部分选对的得部分分,有选错的得分)

9. 已知 , ,双曲线,则下列结论正确的是(

A. 它们的实轴长相等 B. 它们的焦点相同

C. 它们的离心率相等 D. 它们的渐近线相同

【答案】AC

【解析】

【分析】根据双曲线的方程一一求出它们的实轴长、焦点位置、离心率和渐近线方程即可判断各选项.

【详解】对于 A,由题意可知双曲线的长轴长均为,所以它们的实轴长相等,故 A 正确;

对于 B,双曲线的焦点分别在轴和轴上,所以它们的焦点不相同,故 B 错误;

对于 C,双曲线的焦距均为,所以它们的离心率均为,即它们的离心率相等,

 C 正确;

对于 D,双曲线的渐近线分别为 ,

所以当时,它们的渐近线不相同,故 D 错误.

故选:AC

10. 已知直线l,抛物线C,则下列结论正确的是(

A.

通过网盘分享的文件:试卷2

链接: https://pan.baidu.com/s/1Xly6GfIJBK4bBYItuKNSjw?pwd=4321 提取码: 4321 

--来自百度网盘超级会员v8的分享

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  1. CONNECT:[ UseTime:0.000778s ] mysql:host=127.0.0.1;port=3306;dbname=h460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001617s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.006946s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000740s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001324s ]
  6. SELECT * FROM `set` [ RunTime:0.000594s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001534s ]
  8. SELECT * FROM `article` WHERE `id` = 476036 LIMIT 1 [ RunTime:0.001276s ]
  9. UPDATE `article` SET `lasttime` = 1771039978 WHERE `id` = 476036 [ RunTime:0.003751s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000684s ]
  11. SELECT * FROM `article` WHERE `id` < 476036 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.009546s ]
  12. SELECT * FROM `article` WHERE `id` > 476036 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.005792s ]
  13. SELECT * FROM `article` WHERE `id` < 476036 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.008434s ]
  14. SELECT * FROM `article` WHERE `id` < 476036 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.031728s ]
  15. SELECT * FROM `article` WHERE `id` < 476036 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.013700s ]
0.198030s