材料三“自古皆贵中华,贱夷狄,朕独爱之如一……” (1)唐政府先后与吐蕃进行过哪两次和亲? ___________________________________________________________________________________________ (2)北方少数民族向哪一位皇帝献号“天可汗”?为什么? ___________________________________________________________________________________________ (3)从中你能在正确处理民族关系上得到什么启示呢? ___________________________________________________________________________________________ |