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1 . 若平面与一个球只有一个交点,则称该平面为球的切平面.过球面上一点恒能作出唯一的切平面,且该点处的半径与切平面垂直.已知在空间直角坐标系
中,球O的半径为1.记平面
,平面
,平面
分别为
.过球面上一点
作切平面
,且
与
的交线为
,下列说法正确的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd48d1ef9e8cd3b7aea60fd95b70fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef1e8a88d934eca5399decc64fdbd43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1212a95408ff7dfc94efd31c7c4dd78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428a7ced2c03cf0b36888f9a154c4894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/428a7ced2c03cf0b36888f9a154c4894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34517f479fb08f6096d2fb0362f3ad0.png)
A.![]() ![]() |
B.![]() ![]() |
C.过![]() ![]() ![]() ![]() ![]() ![]() |
D.过球面上任意一点![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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