几年过去了，一条宽阔的沥青公路从北方延伸到南方。它像箭一样笔直，但只在一个地方弯曲成马蹄形。

    坐车过往这里的人不约而同地赞叹道：“筑这条路的人一定有一颗高尚的心。”

阅读理解

    This is my new bedroom. There is a small shelf on the desk. Two end tables are near the bed and a photo is over the bed. The chair is in front of the desk. Look at my shoes. They are under the bed. I clean my bedroom on Sunday. I empty the trash every day. Mom says I'm a helpful boy.

如图，在矩形ABCD内，以BC为一边作等边三角形EBC，连接AE、DE．若BC=2，ED=$\sqrt{3}$，则AB的长为   (       )