来自刘宪林的问题
全等三角形的问题`1.AB与DC,AD与BC分别互相平行吗?2.∠A和∠C,∠B和∠D分别相等吗（图的链接：file:///C:/Documents%20and%20Settings/Administrator/Local%20Settings/Temporary%20Internet%20Files/Content.IE5/72L1Q0GH/200907021
全等三角形的问题`
1.AB与DC,AD与BC分别互相平行吗?
2.∠A和∠C,∠B和∠D分别相等吗
（图的链接：file:///C:/Documents%20and%20Settings/Administrator/Local%20Settings/Temporary%20Internet%20Files/Content.IE5/72L1Q0GH/20090702135809-1857873916%5B1%5D.jpg）
