There are two characteristics of the reviewing history lessons in the adult entrance examination:one is the high demand of creation; the other is being strongly aimed at.

In the new century,during the enrollment of HEIs,there appears such phenomena as examinees increasing continuously,the entrance to prestigious universities competing severely,the registering rate of new students decreasing and the enrollment scale becoming steadily.

Challenge from the appearance of vadose water within the surface iayer of megadunes, Badain-jaran dune desert, Inner Mongolia;

This paper, with fractal as the tool and using fractal dimension as the parameter, studies the morphological features of aeolian sand landforms in typical megadune area of Badain Jaran Desert.