_____ at the party, we saw Ruth standing alone in the corner of the hall. [ ]A. Arriving B. To arriv

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• 如图，已知直线y=mx与双曲线的一个交点坐标为（3，4），则它们的另一个交点坐标是A．（﹣3，4）B．（﹣4，﹣3）C．（﹣3，﹣4）D．（4，3）-八年级数学
• 如图，在平面直角坐标系xOy中，△ABC的边AC在x轴上，边BC⊥x轴，双曲线与边BC交于点D（4，m），与边AB交于点E（2，n）．（1）求n关于m的函数关系式；（2）若BD=2，tan∠BAC=，
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