The precise equation of shaping curve of right angle step is built in accordance with the volume balance principle,the results of experimental verification show that a satisfying step shaping curve is available.

The equations of per step shaping curve at each condition were deduced, the discriminants of each conditions and the domains o.

The alliance in Shaoling is a great event in pre-Qin history period,especially for the relation between Qi state and Chu state in Spring and Autumn period.

Then the article analyzes separately the words of "lun", "wu", "qi" and holds the opinion that the original meanings of Zhuangzi is making every thing equal by using dao.

Groundwater Quality Assessment Based on BP Neural Network in Qiqihar District;

Water saving irrigation project and the benefit analysis in Qiqihar;

Present situation of groundwater resources and development suggestion in Qiqihar City;

The term "Keeping Equal is not fair" is one of the most important concepts of equity in Chinese traditional culture,which reflects different viewpoints in different views,so as to determine the relevant educational policies.