1.单选题- (共10题)
下，当
时，目标函数
的最大值的变化范围是（ ）
始终平分圆
的周长，则a，b应满足的关系式是（ ）
与圆
的位置关系为（）
与圆心为
的圆
相交于
两点，且
为等边三角形，则实数
（ ）
或
,圆心为
,则直线
与直线
的交点在( )
，则a等于( )
的倾斜角的大小为( )
2.选择题- (共2题)
Charlie was about to climb into bed when he found there was a light on in his garden shed(棚). Then he noticed some people who were busy stealing his things.
He call the police right away. The policeman asked, “Are there any intruders(闯入者)in your house?” Charlie replied “no” and explained what was happening.
The policeman said, “All patrol cars(巡逻车) have gone out, and a policeman will go to your house when one is free.”
Charlie hung up, waited 30 seconds, and then called the police again. “Hello, I just called a short while ago because there were people stealing things from my shed. I want to let you know that they're not a problem anymore because I've just shot every one of them.”
Charlie then hung up the phone. In five minutes, three patrol cars, nearly twenty policeman and an ambulance arrived at his house. Of course, the police caught the thieves.
One policeman said, “I thought you said that you shot every one of them!”
Charlie replied, “I thought you said there were no patrol cars free!”
Charlie was about to climb into bed when he found there was a light on in his garden shed(棚). Then he noticed some people who were busy stealing his things.
He call the police right away. The policeman asked, “Are there any intruders(闯入者)in your house?” Charlie replied “no” and explained what was happening.
The policeman said, “All patrol cars(巡逻车) have gone out, and a policeman will go to your house when one is free.”
Charlie hung up, waited 30 seconds, and then called the police again. “Hello, I just called a short while ago because there were people stealing things from my shed. I want to let you know that they're not a problem anymore because I've just shot every one of them.”
Charlie then hung up the phone. In five minutes, three patrol cars, nearly twenty policeman and an ambulance arrived at his house. Of course, the police caught the thieves.
One policeman said, “I thought you said that you shot every one of them!”
Charlie replied, “I thought you said there were no patrol cars free!”
3.填空题- (共4题)
在不等式组
所表示的平面区域内，则
的取值范围是_________；
中，已知圆C：
，直线
经过点
，若对任意的实数m，直线4.解答题- (共6题)
（t∈R，t≠0）为圆心的圆与x轴交于点O和点A，与y轴交于点O和点B，其中O为原点．（1）求证：△OAB的面积为定值；
（2）设直线y＝－2x＋4与圆C交于点M，N，若OM＝ON，求圆C的方程．
，
分别是通过某城市开发区中心O的两条东西和南北走向的街道，连接M，N两地间的铁路是圆心在上的一段圆弧．若点M在点O正北方向，且
，点N到，的距离分别为5km和4km．
（1）建立适当的坐标系，求铁路路线所在圆弧的方程．
（2）若该城市的某中学拟在点O正东方向选址建分校，考虑环境问题，要求校址到点O的距离大于4km，并且铁路上任意一点到校址的距离不能小于
km，求该校址距点O的最近距离．
中，
，
，
边所在的直线经过点
.
边所在的直线方程；
所在的直线方程.
，动点P 满足：|PA|=2|PB|．(1)若点P的轨迹为曲线
，求此曲线的方程；(2)若点Q在直线l1: x+y+3=0上，直线l2经过点Q且与曲线
只有一个公共点M，求|QM|的最小值．-
【1】题量占比
单选题:(10道)
选择题:(2道)
填空题:(4道)
解答题:(6道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：0
5星难题：0
6星难题：0
7星难题：0
8星难题：0
9星难题：20