题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-84188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-25729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-51000.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-97241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-58716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-39170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-25729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225400-36513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225400-87141.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225400-48937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225400-48937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-39170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225400-96705.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-42669.png)
(1)过点
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-39170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-69027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-43670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-92167.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-69085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-25444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-25444.png)
(2)在点
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-39170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-25729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-40344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-77931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-69027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-40344.png)
(3)探索:以
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-71406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-85519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-84188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-24296.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225404-20466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225404-96393.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225404-68656.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-84188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225404-21729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225405-69168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225405-12024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225405-64352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225406-49821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225406-42342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225406-92408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225406-34009.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-58071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-43409.png)
当点
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-39170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225400-48937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-25444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-31251.png)
所以,
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-25444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225404-96393.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-25729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-40344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-77931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-69027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-16788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225408-72580.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225408-57764.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225408-93929.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225408-21518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225409-54469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225409-36599.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225409-80545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-39170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225409-88140.png)
设直线
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-40344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225410-28766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225410-49630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225410-13584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225410-59111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-27562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225409-80545.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-40344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225404-68656.png)
(3)由(2)知,当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-74991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-16788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-16788.png)
故分两种情况:
(i)当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-44631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-43670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-41859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225412-85457.png)
过
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225412-41024.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225412-10515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225412-97187.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225413-10193.png)
可得
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225413-12540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225413-61540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225413-50015.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225414-44882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225414-53948.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225414-74024.png)
此时,
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225415-92954.png)
所以,当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-44631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-71406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-85519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-84188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-24296.png)
(ii)当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225415-87358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225401-43670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-41859.png)
此时
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225415-95275.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225414-44882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225415-99742.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225416-59939.png)
解这个方程,得
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225416-53039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225416-93672.png)
由于
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225416-71457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225417-97509.png)
而此时
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225415-87358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225417-30271.png)
所以,当
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225415-87358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-71406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-85519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-84188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-24296.png)
综上所述,以
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-71406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-85519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-84188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-24296.png)
(1)找出三角形相似的条件,利用相似三角形的对应边成比例,求出边界值即可
(2)用待定系数法,找出直线上两点坐标即可,由于
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225359-97241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225410-49630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225409-88140.png)
(3)由于点
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225417-52002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-71406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-85519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225417-52002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-44631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-25444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225414-44882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225411-74991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-16788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225407-16788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225415-87358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225402-25444.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225414-44882.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-71406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-85519.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225358-84188.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225403-24296.png)
核心考点
试题【如图,在直角坐标系中,矩形的顶点与坐标原点重合,顶点在坐标轴上,,.动点从点出发,以的速度沿轴匀速向点运动,到达点即停止.设点运动的时间为.(1)过点作对角线的】;主要考察你对相似图形等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225354-92223.png)
A.0对 B.1对 C.2对 D.3对
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225349-98222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225349-89368.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225342-87999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225342-60878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225342-58856.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225342-87999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225343-41706.png)
①
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225343-18130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225343-94593.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225343-78598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225344-60880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225344-98004.png)
A.1 | B.2 | C.3 | D.4 |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225327-35508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225328-18978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225328-79422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225328-89268.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225328-98366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225329-64788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225329-83096.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225329-72674.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225329-85983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225328-98366.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225330-91758.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225330-25485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225329-85983.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225330-91649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225330-54389.png)
(3)若点
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225331-87795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225331-83766.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225331-90867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225331-88035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225332-68797.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225332-17473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225331-87795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225332-17473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225332-23457.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225322-28723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225322-48098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225322-33500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225323-30820.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225323-79095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225323-39842.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225323-55884.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191102/20191102225325-35093.png)
最新试题
- 1My aunt Lisa is _______ office worker.A.aB.anC./D.the
- 2如图所示,一束电子流在经U1=5000V的电压加速后,沿偏转极板的中线进入偏转电场中,已知偏转极板的长度L=5.0cm,
- 32009年1月上海市虹口区高三调研)阅读材料,回答问题。斯塔夫里阿诺斯《全球通史》:由于中国人闭关自守、骄傲自满。三次灾
- 4最近,你班就“学校是否应该对老师进行民主测评”召开了一次主题班会。讨论情况如下:赞成:65%反对:35%可以促使老师更加
- 5陆 游 陆游已气息奄奄。 儿子要为他请郎中。 陆游摇头制止,说,没有用了。陆游的
- 6(本题12分)某市高三某班围绕该市就业问题进行调查,获取以下信息:信息一 某市电视台记者采访发现,该市民工就业市场上存在
- 7化学知识中有很多的“相等”。请你判断下列说法中不正确的是 [ ]A.同种元素的原子和离子的质子数相等 B.化学反
- 8理解下列句子的意思,回答问题。 ①杏花开了,就好像大自然在传语要赶快耕地;桃花开了,又好像在暗示要赶快种谷子。布谷鸟
- 9下表是某国出生率、死亡率的变化情况,下图是人口增长模式图。回答第题。 1975年1985年1995年2005年出生率(%
- 10水的净化方法,常用的有_________法和_________法。若要得到净化程度较高的纯水可用__________法或
热门考点
- 1奥运冠军刘翔说过,他喜欢同美国名将阿兰·约翰同场竞技,因为这样更能提高自己的成绩,这一事例说明[ ]A.竞争是前
- 2如图,淇淇和嘉嘉做数学游戏:假设嘉嘉抽到牌的点数为x,淇淇猜中的结果应为y,则y =A.2B.3 C.6D.x+3
- 3Don’t always believe him. Sometimes ______ he does is quite
- 4My parents and I_______ interested in films. _______ often g
- 5关于电磁场和电磁波,下列说法不正确的是A.变化的磁场能够产生电场,变化的电场能够产生磁场B.利用无线电波传递声音或图象信
- 6A gentle wind blew through Jennifer"s hair.The golden red su
- 7在某一高处以一定的水平速度将物体抛出,物体落到水平地面上。若空气阻力对物体的作用可忽略不计,下列说法中正确的是 (
- 8补写出下列名篇名句中的空缺部分。(10分)⑴、看万山红遍,层林尽染, ,百舸争流,鹰击长空,,万类霜天竞自由。(《沁园
- 9一个地区自然环境与经济发展往往有着非常紧密的联系。下面是我国西南局部地区矿产和工业分布图,据此回答下列问题。(1)本区域
- 10已知函数f(x)=Asin(x+),x∈R(其中)的图象与x轴的交点中,相邻两个交点之间的距离为,且图象上一个最低点为.