抛物线

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((pāo )()线(xiàn )(pāo )()线(xiàn ))

(shù )(xué )(míng )()(píng )(miàn )(shàng )()()(dòng )(diǎn )P()(dìng )(diǎn )O()()(dìng )(zhí )线(xiàn )AB(bǎo )(chí )(xiàng )(děng )(de )()()(()PQ=PO)()(dòng )(shí )(suǒ )(chéng )(de )(guǐ )()()(zhōng )()(dìng )(diǎn )O(jiào )(zuò )(pāo )()线(xiàn )(de )(jiāo )(diǎn )(jiāng )()()()(xiàng )(shàng )(xié )(pāo )(chū )()(suǒ )(jīng )(de )()线(xiàn )(jiù )(shì )(pāo )()线(xiàn )

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