1. What is the meaning of qualitative, what is qualitative reasoning? 2. Simply describe some basic qualitative reasoning approaches. 3. What kind of problem is to be solved by qualitative reasoning approach, describe its analyse steps. 4. Please describe the boiler heating process with qualitative process. 5. Qualitative simulation reasoning is a relatively important qualitative reasoning architecture, please simply describe its basic approach. 6. Try to compare the qualitative reasoning based on algebra and geometry. 7. Qualitative reasoning has been actually implemented in economy analysis and prediction, please consulting data and study a qualitative reasoning system