61阅读

It is a classified label. It shows us a monthly report recorded by two officials...

etliesontheQinghai-TibetPlateauofthesouthwestborderofChina.Theaverageheightofthe...

the yangtze river, next only to the amazon and the nile, isthe third biggest riv...

加以扩充，历时9年修筑了一条西起临洮东到辽东绵延万里的长城，这也就是中国历史上第一道万里长城。到了汉朝，汉武帝也是为了加强防御，“不叫胡马度阴山”，修筑了一条近...