请回答: (1)从图1和图2可以看出两汉在都城布局上有什么共同特点? ________________________________________________________________________________________________________________________________________________________________ (2)图3与图1、2相比,其在布局上有何特点? ________________________________________________________________________________________________________________________________________________________________ (3)从图4、5提取信息,说明北宋汴京(东京)与唐都长安(图3)在商业活动方面发生了什么变化? ________________________________________________________________________________________________________________________________________________________________ |