如图所示,C、D是线段AB上两点,若AC=3cm,C为AD中点且AB=10cm,则DB=( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/3e20ccb3-e448-4e4c-8fdb-7fe77a180fde.png?resizew=257)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/19/3e20ccb3-e448-4e4c-8fdb-7fe77a180fde.png?resizew=257)
A.4cm | B.5cm | C.6cm | D.7cm |
更新时间:2019-04-20 00:55:56
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】坐标平面上有两个二次函数的图像,其顶点
、
皆在
轴上,且有一水平线与两图像相交于
、
、
、
四点,各点位置如图所示,若
,
,
,则
的长度是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e0c5cb53fd85b7a23f0580df6bb49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,一点从距原点4个单位长度的点
处向原点左方向跳动,第一次跳动到
的中点
处,第二次从点
跳到
的中点
处,第三次从点
跳到
的中点
处.如此不断地跳动下去,则第
次跳动后,该点到原点
的距离为( )
![](https://img.xkw.com/dksih/QBM/2023/12/29/3399688425349120/3400530021949440/STEM/1ab3c9fa1afb46078641cb2da49630a3.png?resizew=244)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b104090ea2ac34be58a76a4e0e95cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd05f27fb25e486092d776339fe3b942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df1d9b712b639c8b6809c9f3ae03706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80be8bad2b64e0297363ba555751a259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32efe4eff75508cb93e828c735dcb695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2023/12/29/3399688425349120/3400530021949440/STEM/1ab3c9fa1afb46078641cb2da49630a3.png?resizew=244)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次