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【简答题】
已知抛物线的顶点在坐标原点,焦点在y轴的正半轴上,且与圆 相交于A、B两点, (1)求抛物线的标准方程 (2)已知直线l:2x-y=8,点P在(1)中的抛物线上,求点P到直线l的距离的最小值,并求出此时点P 的坐标
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【判断题】GB/T18387-2008规定传导发射的技术要求仅适用于通过交流电源线对电池充电过程期间。
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查看完整题目与答案