diff --git a/题库0.3/Problems.json b/题库0.3/Problems.json index d8c64777..4381882f 100644 --- a/题库0.3/Problems.json +++ b/题库0.3/Problems.json @@ -549272,7 +549272,7 @@ }, "021029": { "id": "021029", - "content": "如图, 已知$OA$是球$O$的半径, $OA=5, O_2$是$OA$上的两点, 平面$\\alpha$、$\\beta$分别通过点$O_2$, 且垂直于$OA$, 截得圆$O_1$和圆$O_2$, 当圆$O_1$、圆$O_2$的面积分别为$9 \\pi$、$21 \\pi$时, 求$O_1O_2$的长.\n\\begin{center}\n\\begin{tikzpicture}[>=latex,scale = 0.4]\n\\filldraw (0,0) circle (0.05) node [below] {$O$};\n\\filldraw (0,5) circle (0.05) node [above] {$A$};\n\\filldraw (0,2) circle (0.05) node [right] {$O_2$};\n\\filldraw (0,4) circle (0.05) node [right] {$O_1$};\n\\draw (0,0) circle (5);\n\\draw [dashed] ({-sqrt(21)},2) arc (180:0:{sqrt(21)} and {sqrt(21)/4});\n\\draw ({-sqrt(21)},2) arc (180:360:{sqrt(21)} and {sqrt(21)/4});\n\\draw [dashed] (-3,4) arc (180:0:3 and {3/4});\n\\draw (-3,4) arc (180:360:3 and {3/4});\n\\draw [dashed] (0,0) -- (0,5);\n\\end{tikzpicture}\n\\end{center}", + "content": "如图, 已知$OA$是球$O$的半径, $OA=5$, $O_1$与$O_2$是$OA$上的两点, 平面$\\alpha$、$\\beta$分别通过点$O_2$, 且垂直于$OA$, 截得圆$O_1$和圆$O_2$, 当圆$O_1$、圆$O_2$的面积分别为$9 \\pi$、$21 \\pi$时, 求$O_1O_2$的长.\n\\begin{center}\n\\begin{tikzpicture}[>=latex,scale = 0.4]\n\\filldraw (0,0) circle (0.05) node [below] {$O$};\n\\filldraw (0,5) circle (0.05) node [above] {$A$};\n\\filldraw (0,2) circle (0.05) node [right] {$O_2$};\n\\filldraw (0,4) circle (0.05) node [right] {$O_1$};\n\\draw (0,0) circle (5);\n\\draw [dashed] ({-sqrt(21)},2) arc (180:0:{sqrt(21)} and {sqrt(21)/4});\n\\draw ({-sqrt(21)},2) arc (180:360:{sqrt(21)} and {sqrt(21)/4});\n\\draw [dashed] (-3,4) arc (180:0:3 and {3/4});\n\\draw (-3,4) arc (180:360:3 and {3/4});\n\\draw [dashed] (0,0) -- (0,5);\n\\end{tikzpicture}\n\\end{center}", "objs": [], "tags": [ "第六单元" @@ -549284,7 +549284,8 @@ "usages": [], "origin": "2024届高二校本作业必修第十一章", "edit": [ - "20230101\t王伟叶" + "20230101\t王伟叶", + "20231102\t王伟叶" ], "same": [], "related": [],