2013年山西中考数学题填空题最后一个怎么解如图是我省某地一座抛物线形拱桥,桥拱在竖直平面内,与水平桥面相交于A,B两点,拱桥最高点C到AB的距离为9㎝,AB为36㎝,DE为拱桥底部的两点,切DE∥AB,
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![2013年山西中考数学题填空题最后一个怎么解如图是我省某地一座抛物线形拱桥,桥拱在竖直平面内,与水平桥面相交于A,B两点,拱桥最高点C到AB的距离为9㎝,AB为36㎝,DE为拱桥底部的两点,切DE∥AB,](/uploads/image/z/1055100-12-0.jpg?t=2013%E5%B9%B4%E5%B1%B1%E8%A5%BF%E4%B8%AD%E8%80%83%E6%95%B0%E5%AD%A6%E9%A2%98%E5%A1%AB%E7%A9%BA%E9%A2%98%E6%9C%80%E5%90%8E%E4%B8%80%E4%B8%AA%E6%80%8E%E4%B9%88%E8%A7%A3%E5%A6%82%E5%9B%BE%E6%98%AF%E6%88%91%E7%9C%81%E6%9F%90%E5%9C%B0%E4%B8%80%E5%BA%A7%E6%8A%9B%E7%89%A9%E7%BA%BF%E5%BD%A2%E6%8B%B1%E6%A1%A5%2C%E6%A1%A5%E6%8B%B1%E5%9C%A8%E7%AB%96%E7%9B%B4%E5%B9%B3%E9%9D%A2%E5%86%85%2C%E4%B8%8E%E6%B0%B4%E5%B9%B3%E6%A1%A5%E9%9D%A2%E7%9B%B8%E4%BA%A4%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2C%E6%8B%B1%E6%A1%A5%E6%9C%80%E9%AB%98%E7%82%B9C%E5%88%B0AB%E7%9A%84%E8%B7%9D%E7%A6%BB%E4%B8%BA9%E3%8E%9D%2CAB%E4%B8%BA36%E3%8E%9D%2CDE%E4%B8%BA%E6%8B%B1%E6%A1%A5%E5%BA%95%E9%83%A8%E7%9A%84%E4%B8%A4%E7%82%B9%2C%E5%88%87DE%E2%88%A5AB%2C)
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