题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100627-97831.png)
答案
解析
已知DA⊥AB于A,CB⊥AB,要使DE=CE
即要
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100627-41270.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100627-24724.png)
已知AB=25,DA=15,CB=10
设AE为
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100627-20522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100628-99942.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100628-54169.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100628-97539.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100628-59682.png)
可得
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100629-88465.png)
所以E站应建在离A站10千米处。
核心考点
试题【如图,铁路上A,B两点相距25千米,DA⊥AB于A,CB⊥AB于B,已知DA长15千米,CB长为10千米,现在要在铁路AB上建一个农产品收购站E,使得C、D两村】;主要考察你对相似图形性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100618-46245.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100618-16974.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100618-16974.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100618-41566.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100613-51455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100613-94591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100613-19849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100613-93937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100613-93937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100614-71735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100614-15937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100607-62876.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100607-73600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100607-53110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100607-91317.png)
经过平移后得到△
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100608-51670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100608-85203.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100609-63661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100609-77807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-95082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-93459.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-63789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-33581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-95082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-74240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100600-46819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100600-95788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100600-31943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-33581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100600-93995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100600-35928.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100600-15326.png)
(2)△
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100559-95082.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100600-95788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-78069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-42093.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-72343.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-36137.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-23261.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-42624.gif)
(1)试说明:△
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-78069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-75055.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-61372.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-63943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100550-36137.gif)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100551-53773.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191103/20191103100551-58335.gif)
最新试题
- 1如图1是初中化学常见物质之间的转化关系,(反应条件及部分反应物、生成物已省略).其中A、H、I、J、K是单质,D、G常温
- 2的值是( ).A.B.C.D.
- 3阅读文段,回答问题。请等等落在身后的灵魂麦家 我曾养过两只狗。一只是朋友送的,德牧,名门血统,姿态高贵,仪表堂堂。我不
- 4下列实验能成功的是( )A.将乙酸和乙醇混合加热制乙酸乙酯B.苯和稀硝酸反应制硝基苯C.CH3CH2Br中滴加AgNO
- 5 如图,在△ABC中,BD⊥AC,EF⊥AC,垂足分别为D、F.(1)若∠1=∠2,试说明DE∥BC;(2)若已知DE∥
- 6It is reported that many a new house at present in th
- 7如图多次函数的图象与x轴相交于A、B两点,与y轴相交于你点,点你、D是多次函数图象上的一对对称点,一次函数的图象过点B、
- 8细菌、真菌、植物、动物的遗传物质是DNA,病毒的遗传物质是DNA或者是RNA______.
- 9( 1 ) (4分)在实验室鉴定氯酸钾晶体和1-氯丙烷中的氯元素,现设计了下列实验操作程序:①滴加AgNO3溶液;②加入
- 10下列不属于蒸腾作用意义的一项是 [ ]A.促进水分和无机盐的运输 B.增加空气湿度、调节气候 C.降低叶面温度
热门考点
- 1下图是北半球某段河流河道形态和断面图,虚线表示河流主航道中心线。读图完成下列各题。小题1:据图1中信息判断①一②、②一③
- 2一辆汽车在某段路程中的行驶速度与时间的关系如下图,(1)求图中阴影部分的面积,并说明所求面积的实际意义;(2)假设这辆汽
- 3函数y=x2-2x-3的零点是( )A.1,-3B.3,-1C.1,2D.(3,0),(-1,0)
- 4如图,在边长为a的菱形ABCD中,∠ABC=60°,PC⊥面ABCD,E,F是PA和AB的中点。(1)求证: EF∥平面
- 5假设地球表面不存在大气层,那么观察到的日出时刻与实际存在大气层时的情况相比 [ ]A. 将提前 B. 将延后
- 6英国前首相丘吉尔曾经说过,我宁愿失去一个印度而不愿失去一个莎士比亚,下列文化名人中属于英国的有①牛顿 ②拜伦
- 7在农村排有第一位是恶性肿瘤是胃癌,从发生的病因来看,主要是下列哪一情况造成的( )A.接触了大量的放射性物质B.不进行
- 8***诗云:“钟山风雨起苍黄,百万雄师过大江。虎踞龙盘今胜昔,天翻地覆慨而慷。”诗中的“天翻地覆”所指的重大历史事件应是
- 9辩证的否定观教给我们正确的生活态度是 ( ) A.抛弃传统观念,开拓新境界B.对权威说“不”,怀疑和否定一切C.敢于自
- 10 Have you got these jeans in larger size? This pair is a b