题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020131-73041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020131-46351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020132-10655.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020132-85922.png)
A.5 | B.6 | C.8 | D.10 |
答案
解析
试题分析:抛物线
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020131-73041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020132-29663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020131-46351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020131-46351.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020132-38314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020132-85922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020133-94618.png)
点评:抛物线上的点到焦点的距离等于它到准线的距离,这是非常好用也经常用到的一条性质.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020125-24881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020125-86508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020125-21391.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020118-48545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020118-78484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020118-14155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020119-48379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020106-41722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020106-20242.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020106-44612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-46341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-61468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-98552.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-46341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-70510.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-46341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020108-68667.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-61468.png)
(2)椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-61468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020108-54332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020107-46341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020106-44612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020108-36425.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020108-54332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020100-81647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020100-72133.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020101-57426.png)
A.![]() ![]() | B.![]() ![]() |
C.y![]() ![]() | D.![]() ![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020054-83278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020054-52941.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020054-44598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026020054-13070.png)
A.![]() | B.![]() | C.![]() | D.![]() |
最新试题
- 1已知x,y满足条件则的取值范围是( )A.[,9]B.(-∞,)∪(9,+∞)C.(0,9)D.[-9,-]
- 2将直线y=—x+1的图象向上平移3个单位长度,得到直线_________.
- 3(本小题满分6分)学生每天体育锻炼不少于1小时的要求,为确保时间得到落实,某校对九年级学生每天参加体育锻炼的时间作了一次
- 4China rank ______ in the 2008 Beijing Olympic Games and more
- 5图1是t1℃时相同质量的甲、乙两物质同时放入100g水中的溶解情况,图2是它们的溶解度随温度变化的函数关系图,据此回答下
- 6Quick Reference IndexItemsPagesItemsPagesACTORS AND ACTRESSE
- 7阅读下面的文言文,完成1~4题。 刘谦,博州堂邑人。曾祖直,以纯厚闻于乡党,里有盗其衣者,置不问。州将廉知,俾人故窃其
- 8I often a red swimsuit when I swim. [ ]A. pu
- 9--How are the things in your village? --Modern farming metho
- 10当______时,分式x2-2x-3x-3的值为零.
热门考点
- 1书面表达。 请根据实际情况填写下表,然后以Myself为题,写一篇演讲稿,全面介绍自己的情况,内容包括(可以适当
- 2一架老式飞机在高出地面4.5km的高度,以1000/s的速度水平飞行。某时刻投下一颗炸弹,不计空气阻力(1)求炸弹下落的
- 3对收入差距扩大应分层次对待:第一层次是属于有利于提高效率的激励部分,也是克服平均主义的成果,应加以肯定。第二层次属于经济
- 4蛔虫的消化器官不同于涡虫的特点是A.有口无肛门B.有口有肛门C.有小肠大肠D.无口有肛门
- 52009年“世界环境日”的主题是“团结起来应对气候变化”。下列做法不符合这一主题的是[ ]A.鼓励建设小型火力发
- 6诗、文名句填空。① __________________,夜泊秦淮近酒家。(杜牧《泊秦淮》) ②夜阑卧听风吹雨,____
- 7某同学在学校沿直线以一定速率回家去拿一本掉在家中的参考书,他在家中歇着喝了一杯水,然后又以一定速率返回学校上课,则在以下
- 8(本题6分)如图,已知圆锥的轴截面ABC是边长为2的正三角形,O是底面圆心.(Ⅰ)求圆锥的表面积;(Ⅱ)经过圆锥的高AO
- 9区分下列各组物质的方法均正确的是[ ]需区分的物质方法A.硬水和软水①观察颜色②煮沸B.碳酸氢铵和磷矿粉①加氢氧
- 10双曲线的实轴长为 ( )A.B.C.D.