如图,在平面直角坐标系中,点
,直线
交坐标轴于B、C,且
,点M在直线
上,且
,则直线
的解析式为( )
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700482002329600/2700548158472192/STEM/d6752e25dbe74b5d9e50538cc59e246e.png?resizew=215)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c536b68b1855a7ab75708a70520133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ae3be6b61f47adec52270491b3a148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c050b1559631a108c3d8561c7e4c1fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700482002329600/2700548158472192/STEM/d6752e25dbe74b5d9e50538cc59e246e.png?resizew=215)
A.![]() | B.![]() | C.![]() | D.![]() |
20-21八年级上·浙江·单元测试 查看更多[2]
更新时间:2021-04-15 21:02:12
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【推荐1】某小区有一块绿地如图中等腰直角
所示,计划在绿地上建造一个矩形的休闲书吧
,其中点P,M,N分别在边
,
,
上,记
,
,图中阴影部分的面积为S,当x在一定范围内变化时,y和S都随x的变化而变化,则y与x,S与x满足的函数关系分别是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187afae05a3bf2081bc7d381255bcc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea98a1fefa6385dd05aded1ebce24edf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04fd22e3ef2e86ba904d30bc28d34b14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/16/e6bf1f7f-1cda-4af8-a9f8-95ac32d8624b.png?resizew=120)
A.正比例函数关系,一次函数关系 | B.一次函数关系,二次函数关系 |
C.一次函数关系,一次函数关系 | D.正比例函数关系,二次函数关系 |
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【推荐2】根据物理学知识可知:平面镜反射光线的规律是射到平面镜上的光线和被反射出的光线与平面镜所夹的锐角相等.如图,一束光线
射到平面镜a上,被a反射后的光线为
,则入射光线
,反射光线
与平面镜a所夹的角相等,即
,若按如图建立平面直角坐标系,并设入射光线和反射光线所在直线的解析式分别为
,
,则下列关于
,
的关系说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0958f495f0ba9d7c0dcca7114a27cf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01329473ed89417dc98a795b1ea89533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,
,点
为
的平分线上的一个定点,点A,B分别为边
,
上的动点,且
,则以下结论中:①
;②
为定值;③四边形
的面积为定值;④四边形
的周长为定值.正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac144685e50009fa7c9233d85e8bd85b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
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A.4 | B.3 | C.2 | D.1 |
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【推荐2】如图,已知平行四边形
的顶点
分别在直线
和
上,点
是坐标原点,则点
的横坐标为( )
![](https://img.xkw.com/dksih/QBM/2020/9/7/2544435533996032/2546588492201985/STEM/84f206dc919243eaa79145f6cb6387f5.png?resizew=182)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098a3e7d1f1890863b7483a98b618119.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐1】如图,在四边形
中,
,E为对角线
的中点,连接
,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/89271920-4d42-4273-9071-d920a276eb67.png?resizew=141)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】如图,在
中,
,
于点D,
,点E是斜边
的中点,且
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/08a72946-3d98-4465-a030-29bed46270bd.png?resizew=177)
A.2 | B.![]() | C.3 | D.![]() |
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