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2025年江苏省高考数学真题及笔试、听力完全解读【PDF版分享】高考数学下载

  • 2026-03-16 10:38:18
2025年江苏省高考数学真题及笔试、听力完全解读【PDF版分享】高考数学下载
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7.B【分析】先求出圆心E(0,-2)到直线 y=3x+2 的距离，然后结合图象，即可得出结论.【详解】由题意，在 x2+(y+2)2=r2(r>0)中，圆心E(0,-2)，半径为 r，到直线 y=3x+2 的距离为 1 的点有且仅有 2 个，∵ 圆心 E(0,-2) 到直线 y=3x+2 的距离为：d=∣0×3−(−2)×1+2∣(3)2+(−1)2=2，

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  15. SELECT * FROM `article` WHERE `id` < 459858 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001704s ]
0.080218s