This paper discusses the contribution of the famous British historical geographer Sir Clifford Darby to the academic nature of historical geography; cross-section method; case study of regional historical geography; Domesday Geography and cartography.

A class of rings constructed by an abelian group;

Hydrocarbon accumulating model and forecasting of favorable prospecting areas in buried hill of Budate Group,Beier Sag;

Classification of reservoir types of Budate group in clastic buried hills of Sudeerte structural zone,Hailaer Basin;

Development Period of Fractures in the Budate Group in the Sudeerte Structural Zone,Hailaer Basin;

suzulii and Arctica subexten-sa and the gastropod Biplica obliqu discovered in the Dawaxung Group have the features of the Creta-ceous fauna,which suggests that the Dawax ung Group was deposited in the Early Cretaceous Hauterivian-Albrian rather than in the Mid-Upper Jurassic and corresponds completely with the upper part of the Ze-long Group in the area.