1 . 已知圆
:
,圆
:
,P,Q分别是
,
上的动点,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aed65024898bb517e8cd6a2c663b836e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f46bd6985253f993dc2d1c12b801dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
A.当![]() ![]() |
B.当![]() ![]() |
C.当直线PQ与![]() ![]() ![]() ![]() |
D.当直线PQ与![]() ![]() ![]() |
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解题方法
2 . 下列结论中正确的是( )
A.若直线![]() ![]() ![]() ![]() |
B.已知曲线![]() ![]() ![]() ![]() ![]() |
C.若直线![]() ![]() ![]() |
D.圆![]() ![]() |
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3 . 已知圆
和圆
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a277b645db0a012ed0865db716571e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8423eb0a2c34396f7980188ad763cd30.png)
A.圆![]() ![]() |
B.点![]() ![]() ![]() ![]() |
C.圆![]() ![]() ![]() |
D.圆![]() ![]() ![]() |
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4 . 已知直线
和圆
,则下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edf713d2b57b0d8982f4a2f7e61ccf39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12d69e02e9e3b1695c6a1117ed5e80.png)
A.直线![]() ![]() |
B.圆![]() ![]() |
C.直线![]() ![]() ![]() |
D.当![]() ![]() ![]() |
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解题方法
5 . 已知圆
:
(
),这些圆的全体构成集合
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a94555857a26590865f337f8c4a93c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1755c50d97403308e515438739e62a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2254320c5315470ac972ec9848c56b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8d5dfed6938bc1585797c66a5d8aaa.png)
A.x轴截圆![]() |
B.对任意正整数k,圆![]() ![]() |
C.任意正实数m,存在![]() ![]() ![]() |
D.存在正实数m,使得A中与直线![]() |
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6 . 已知圆O:
(
)与圆M:
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3503d330608e7138d1b529aba4512fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ba6b6aa6c3f9faba6b03bc193a6e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571445535e1bbf655bf53c80a810226d.png)
A.若![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() |
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7 . 已知圆
:
和圆
:
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb74eb81a7bd7304437379eb231e1795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8d0edccdeb48da311168d0625827a6.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若圆![]() ![]() ![]() |
D.若圆![]() ![]() ![]() |
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8 . 若点
为原点,且圆
与圆
没有公共点,则圆
的半径可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ac0d8922f441ba511dac38e2d06adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.1 | B.2 | C.8 | D.9 |
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9 . 已知圆
,点
是直线
上一动点,过点
作直线
,
分别与圆
相切于点
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a10d715d1bb7ff3df392f8c43c5928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac27984896c556ce6060e691eb708d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.圆![]() ![]() ![]() |
B.直线![]() ![]() |
C.![]() ![]() |
D.四边形![]() |
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10 . 若圆M:
与圆N:
相交,则k的取值可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298f4275256011cae83c4b166da3a1a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4b73047d4839a882720e0e7f719411.png)
A.![]() | B.1 | C.3.8 | D.4.2 |
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