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【简答题】
如图，在直角坐标平面内，已知点A的坐标（-5，0）， （1）图中B点的坐标是______； （2）点B关于原点对称的点C的坐标是______；点A关于y轴对称的点D的坐标是______； （3）△ABC的面积是______； （4）在直角坐标平面上找一点E，能满足S △ADE =S △ABC 的点E有______个； （5）在y轴上找一点F，使S △ADF =S △ABC ，那么点F的所有可能位置是______；（用坐标表示，并在图中画出）
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