已知线段AB=3cm,延长线段AB到C,使BC=4cm,延长线段BA到D,使A为DC的中点,则线段CD的长为( )
![](https://img.xkw.com/dksih/QBM/2018/6/10/1964270157987840/1967790876508160/STEM/cc498d559b2d41abadfceca521a2e2cf.png?resizew=184)
![](https://img.xkw.com/dksih/QBM/2018/6/10/1964270157987840/1967790876508160/STEM/cc498d559b2d41abadfceca521a2e2cf.png?resizew=184)
A.14cm | B.8cm | C.7cm | D.6cm |
更新时间:2018-06-15 14:23:41
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单选题
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【推荐1】下列说法中,不正确的是( )
A.过两点有且只有一条直线 |
B.连接两点的线段叫做两点的距离 |
C.同角的补角相等 |
D.点B在线段![]() ![]() ![]() |
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【推荐2】如图,C为线段
上一点,D为线段
的中点,
,
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/1f532ae8-d219-42d3-86cc-ae8d7a940566.png?resizew=233)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b1927db96d84f27197b5a654b622f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18b5e7ad8fde2001e99ae54838adb9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/16/1f532ae8-d219-42d3-86cc-ae8d7a940566.png?resizew=233)
A.8 | B.9 | C.10 | D.11 |
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