This paper introduces the new concept of ecological cement,and gives a review on the status of urban refuse treatment such as garbage and sludge,the production process of ecological cement and the status of ecological cement at home and abroad.To produce ecological cement using urban garbage and sludge broadens the source of raw materials,reduces the consumption of natural resources,and reduces the cost of cement production,which is a promising way for the sustainable development of cement industry.

This paper analyses the problems and shortcomings in middle school chemical experiment teaching from four aspects such as lecture experiment, group experiment,requirement of teachers to students experiment,ability of teachers for inquiry experiment,and gives relevant solving strategies through teaching practice.