Question

为什么新疆公路线大多绕盆地边缘修筑，呈环状分布？
                                                                                                                                                                
                                                                                                                                                                

Answer 1

提示：原因有二，一是沿等高线分布，施工难度小；二是盆地边缘多绿洲分布，是人口和城市相对集中的地区。