Research results show that either based on the overall judgment or through analyzing several other indicators,such as the water sources of irrigation,water supply reliability and the changes of groundwater table,water shortage cannot be ignored.

A research on the reasons for the decline of mobile customer s ARPU value and its changing trend;

Research on the Abnormal Changing Trend of the Financial Status of Listed Companies Based on Bayesian Network;

The article,studying the changing trend of income disparity among urbanites in Beijing,analyzes the causes of the disparity,and on this basis,makes a corresponding proposal on policy making.

Through tracking down the changing tendency over 20 years since the opening and reform of our country and inspecting the mental model and operating strategy of the development of colour TV-making industry, this paper holds that TV-making industry must think s.