2011·广东深圳·一模
1 . 已知圆面
的面积为
,平面区域
与圆面
的公共区域的面积大于
,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab12dc10145236042e5cc895064cc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce0a5282d7bd2c6e54f6113c84438ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b9cf868dc77759a01d2f550d6ab291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9-10高二下·河南焦作·期末
2 . 如图,已知AD//BE//CF,下列比例式成立的是
![](https://img.xkw.com/dksih/QBM/2011/5/6/1570184122597376/1570184127569920/STEM/3dc31725cf6f466585aa9ecff61afc55.png)
![](https://img.xkw.com/dksih/QBM/2011/5/6/1570184122597376/1570184127569920/STEM/3dc31725cf6f466585aa9ecff61afc55.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2010·北京海淀·二模
3 . 如图,
是
的直径,
切
于点
,连接
,若
,则
的大小为
![](https://img.xkw.com/dksih/QBM/2010/5/7/1569719811866624/1569719816511488/STEM/fbf77006dfde4644ae39377c634d34cd.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c3f982d999937891eec4cb22d62e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1ce1f63ed1acb6e7a69541251722576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/189590914cde8d95141517df9bf1050f.png)
![](https://img.xkw.com/dksih/QBM/2010/5/7/1569719811866624/1569719816511488/STEM/fbf77006dfde4644ae39377c634d34cd.png?resizew=164)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 若无论实数
取何值时,直线
与圆
都相交,则实数
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da6cdafa6b648336f2381fe8807fb931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8f816b20f385fb29ab7a3985225fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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5 . 已知PQ与圆O相切于点A,直线PBC交圆于B、C两点,D是圆上一点,且AB∥DC ,DC的延长线交PQ于点Q.
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572588562546688/1572588568035328/STEM/ac6ae66cfecc4ccab7864831b5a9c67e.png)
(1)求证: AC2=CQ×AB;
(2)若AQ=2AP,AB=
,BP=2,求QD.
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572588562546688/1572588568035328/STEM/ac6ae66cfecc4ccab7864831b5a9c67e.png)
(1)求证: AC2=CQ×AB;
(2)若AQ=2AP,AB=
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572588562546688/1572588568035328/STEM/6c62ee9cadb44de8820f95ed21ba65d8.png)
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6 . 过点(-2,0)的直线l与圆x2+y2=5相交于M、N两点,且线段MN=2
,则直线l的斜率为( )
![](https://img.xkw.com/dksih/QBM/2017/8/6/1746197124546560/1746453500190720/STEM/e8630963468441498b68b10dd452c015.png?resizew=17)
A.![]() | B.![]() | C.![]() | D.![]() |
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